WO2022260390A2 - Method for personalizing place being shown on initial screen of digital map and digital map system using same - Google Patents

Abstract

Provided is a method for sharing with a receiver by sending a text message including indoor and outdoor places being shown on a map app being executed with a web app. The method comprises the steps of: a sender sending a text message; and a receiver selecting the received text message and executing a map app.

Description

A method for personalizing a place shown on the initial screen of a digital map and a digital map system using the same

The present invention can personalize the place shown on the initial screen of the digital map for each user, and furthermore, provides an easy way for the recipient to view the same map screen as the sender by sending the place shown on the screen of the digital map as a text message. do.

In the late 1990s, feature phones equipped with the latest technology at the time called Code-Division Multiple Access (CDMA) began to rapidly expand. At that time, there was a TV commercial that made comedian Lee Chang-myeong a national star. When a person on a fishing boat ordered jajangmyeon over the phone from Marado, the southernmost island of Jeju Island, a delivery man (Lee Chang-myeong) carrying a steel bag shouted, “The person who ordered jajangmyeon!”

This advertisement was devised by a mobile phone manufacturer to comically appeal to the notion that 'its phones work everywhere.' Due to the sensational popularity of this advertisement, it has become a new trend to order and eat jajangmyeon at the beach, and it is said that many Chinese restaurants are still in business in Marado, not restaurants suitable for the beach, such as seafood soup restaurants and raw fish restaurants.

Now is the age of smart phones, and many sensors such as GPS (Global Positioning System) sensors, acceleration sensors, and geomagnetic sensors are embedded in cellular phones, and native apps (native You can use a digital map in the form of an app (native application) or a web app (web application) that runs in an internet browser. Therefore, if you check your location using a map app (map application) that works with the GPS sensor and then order Jajangmyeon over the phone, the delivery person will be able to find you much more easily than before.

Using the GPS sensor built into the smartphone, latitude, longitude, and altitude corresponding to the location of the smartphone can be obtained. However, the latitude used in a smartphone or car navigation system is different from the latitude learned in elementary school. Since the latitude taught in textbooks describes latitude and longitude assuming that the earth's shape is a perfect sphere, the latitude that exists in our common sense is actually geocentric latitude. However, the latitude used in maps and GPS systems is called geodetic latitude.

Geodetic latitude reflects the fact that the Earth's shape approximates a rotational ellipsoid (ellipsoid of revolution, spheroid), or oblate spheroid, due to the rotation of the Earth on its axis. In simple terms, it means that the shape of the earth is similar to a slightly flattened shape by pressing a volleyball ball with your hand. In other words, the shape of the earth is not round like a grape or elongated like a melon, but flat like a tangerine. This Earth ellipsoid is used as a reference ellipsoid when making maps. 1 is a conceptual diagram for understanding the difference between geodetic latitude φ and geocentric latitude ^ψ .

In order to model the earth, not only this shape but also the location and orientation of the origin of the spheroid relative to the real earth must be determined. The center C of the Earth's ellipsoid is located at the center of mass of the Earth, and the error is said to be within 2 cm. The Earth's rotation axis 102 passes through the Earth's center of mass. And two points where the earth's axis of rotation 102 meets the earth ellipsoid 101 are the north pole (NP) and the south pole (SP). Since the Earth's ellipsoid is oblate, the semi-minor axis of this spheroid coincides with the Earth's axis of rotation.

The coordinates of a point P on the Earth can be expressed as (X, Y, Z) in a three-dimensional Cartesian coordinate (three-dimensional rectangular coordinate). The 3D Cartesian coordinate system is set in the ECEF (Earth-Centered, Earth-Fixed) method. The origin of the three-dimensional rectangular coordinate system is located at the center (C) of the Earth's ellipsoid, and the Z-axis coincides with the minor axis of the spheroid. The direction from the South Pole to the North Pole is the positive (+) direction of the Z-axis, and the X-axis and Y-axis are included in the Equatorial plane. In fact, the two points where the earth's axis of rotation intersects with the earth's surface are the north and south poles. These north and south poles do not exactly coincide with the magnetic northern (north magnetic pole) or magnetic southern pole (which the compass points to). That is, the Z-axis is the Earth's axis of rotation, and the X-Y plane is the equatorial plane. Earth-Fixed means that this coordinate system rotates as the Earth rotates.

The application of the optimal spherical coordinate system to this earth spheroid is called a geodetic datum. The geographic coordinate system or World Geodetic System (WGS) is a standard for cartography, geodesy and satellite-based navigation. The most recent WGS is a system called WGS 84, WGS 1984 or EPSG:4326, and GPS uses this system.

The plane containing the North and South Poles also includes the center (C) of the Earth's ellipsoid, and the line of intersection between this plane and the Earth's ellipsoid is given as an ellipse. However, since the center of the ellipse coincides with the center of the earth's ellipsoid, it is called a great circle for convenience. The line of intersection from the North Pole to the South Pole, or half of the great circle, is called the meridian or lines of longitude. And the meridian passing through the Royal Greenwich Observatory is the prime meridian, and the meridian on the opposite side is the antimeridian.

The coordinates of a point P on the Earth can also be expressed by the geodetic latitude φ, the longitude λ, and the ellipsoidal height h. A coordinate system using geodetic latitude φ, longitude λ and height h is called a geodetic coordinate system. Here, geodetic latitude is not measured based on a line segment connecting origin C and point P in a three-dimensional rectangular coordinate system. At the point P, the normal n to the earth ellipsoid 101 is lowered. The point 103 where the normal line n intersects the earth ellipsoid 101 will be referred to as an ellipsoidal point. If a tangent plane 104 is drawn from the ellipsoid point 103 to the earth ellipsoid 101, then by definition the normal passes perpendicularly through the tangent plane 104. The angle φ that the normal makes with the equatorial plane (XY plane) is the geodetic latitude. And the distance from the point 105 where the normal line meets the Z-axis to the ellipsoid point 103 is the radius of ^curvature in the prime vertical R _N.

The semi-major axis (radius of the semi-major axis) of the earth spheroid is ^6,378,137 m. If the radius of the major axis of the earth spheroid, that is, the major radius is a, and the minor axis, radius of the semi-minor axis, that is, the radius of the semi-minor axis is b, the eccentricity e of the earth ellipsoid is Equation 1 is given as

And the radius of curvature R _N of the hairline is given by Equation 2.

That is, the radius of curvature of the catheter is given as a function of the geodetic latitude φ, not a constant. In addition, the three-dimensional rectangular coordinates X, Y, and Z are given as Equations 3 to 5 as functions of geodetic latitude φ, longitude λ, and ellipsoidal height h.

The line of intersection between the Earth's ellipsoid and the plane of the equator is the equator, and the X-axis of the three-dimensional rectangular coordinate system is a straight line passing through the intersection point of the prime meridian and the equator at the center of the Earth.

The longitude of a point P on the Earth is the angle formed by the meridian plane containing the point with the X-Z plane, and is given by Equation 6.

Meanwhile, the distance from the ellipsoidal point 103 to the point P is the ellipsoidal height h. Also, the angle formed by the line segment from the center C of the earth ellipsoid to the ellipsoid point 103 with the X-Y plane is the geocentric latitude ψ. The geocentric latitude is given by Equation 7.

The formula for geodetic latitude is quite complex and is given as Equation 8.

That is, the formula for obtaining geodetic latitude includes geodetic latitude. Therefore, it cannot be calculated simply by tapping a calculator. When we casually refer to latitude, we mean precisely geodetic latitude. The latitude displayed on digital maps such as Google Maps (https://www.google.com/maps) or Naver Maps (https://map.naver.com) is a geodetic latitude.

In fact, it is difficult to understand why geodetic latitude should be used in modern times. It is probably related to the history of sailors measuring latitude by looking at constellations such as the Big Dipper and measuring longitude by comparing the altitude of the sun with the clock in the age of discovery and exploration. will be. On the other hand, longitude is the same concept as what you learned in elementary school textbooks, but there is a subtle difference in that the prime meridian does not exactly pass through the Greenwich Observatory. In any case, it is possible to mutually transform geodetic latitude φ, longitude λ, and ellipsoidal height h with the coordinates (X, Y, Z) of a 3-dimensional rectangular coordinate system using the above equation.

As can be seen from the foregoing, in order to specify an accurate three-dimensional position on the earth, in addition to (geodetic) latitude and longitude, the height h of the ellipsoid at that point must be given. However, the GPS coordinates given by the smartphone are geodetic latitude, longitude, and height above sea level. Altitude above sea level is the height measured based on the geoid, and the geoid is a virtual closed surface obtained when the height of average sea level is extended to the land. The exact shape of the geoid is neither a sphere nor a spheroid. Although it is close to a spheroid, it is given as a rugged closed surface due to the difference in the amount and density of materials underground or on the ground, and it is virtually impossible to describe the entire shape of the geoid as a mathematical function.

If you look at the value of the GPS sensor on your smartphone, you can know (geodetic) latitude, longitude, and altitude above sea level. However, unless you need the exact shape of the Earth, your current location, or the distance between two points, such as surveying, civil engineering, construction, or military operations, you probably don't need to know what height you are actually on the Earth's ellipsoid.

Like ants attached to a balloon, altitude is not necessary to specify the location of most people who live confined to the surface or sea level. The use of GPS that ordinary people need in their daily lives would be to know where I am on a map and how much the distance between two points or the approximate distance from a reference point is. In other words, if only the exact location on the map can be known from the GPS signal, it is not necessary to know that the shape of the earth is a spheroid and that the physical quantity we call latitude is exactly geodetic latitude.

Therefore, wherever you are on the earth, you can specify the location only with latitude and longitude. In other words, even if you get lost in the deep mountains of Jirisan Mountain, get stranded in the vast Sahara Desert, or even shipwrecked and drift on an unknown uninhabited island, you can check (geodetic) latitude and longitude with the GPS sensor if your smartphone works. . In addition, if the latitude and longitude are notified to the rescue team, the rescue team will be able to find the person to be rescued immediately without having to go through the trouble of searching for the missing person.

If we think back to the age of smartphones when ordering jajangmyeon off the coast of Marado, the reason why the jajangmyeon deliveryman shouted out loud to find the orderer was because the exact location of the customer was not known. 2 is a search for the southern tip of Marado on Naver Map. As can be seen in FIG. 2, Marado is a fairly small island with few landmarks, and it is not easy to specify a place with a detailed address or number. Therefore, without an accurate address at sea, the guest would have had no choice but to inform his location rather vaguely, such as 'a white fishing boat 30m off the coast of Janggunbawi Rock'.

Figure 3 is the result of moving to the southern end of the same Marado on Google Maps. Here, if you click on a point in front of General Rock, a small pop-up window will appear. In Figure 3, it is indicated as the East China Sea (33.112810, 120.269394). In other words, this point is located at (geodetic) latitude 33.112810° and longitude 120.269394°, which means that it belongs to the East China Sea (South Sea).

Also, if you look at the address bar of this map screen, "https://www.google.co.kr/maps/@33.113906,126.2683883,17.5z?hl=ko" is displayed. This is a GET method that displays the address of the southern tip of Marado on Google Maps. Specifically, it means to search (@) for a point with latitude 33.113906° and longitude 126.2683883° on the map (/maps) of Google Korea (https://www.google.co.kr) and display it at zoom 17.5 (17.5z). , and "hl=ko" means to display the language for displaying geographical names in Korean (ko). If you change it to "hl=en" the same map will be displayed in English.

FIG. 4 shows a URL (Uniform Resource Locator), that is, a web address shown in the address bar (address bar, location bar, URL bar) of FIG. 3 on a desktop computer, as a web browser of Google. Paste it into the address bar of Chrome and press Enter to see the result. As can be seen from FIG. 4, a screen almost identical to that of FIG. 3 appears. Looking at the slight difference, I entered the zoom as 17.5, but Google Maps truncates the zoom level to a natural number and displays it.

This is possible because Google Maps (https://www.google.co.kr/maps) running on the web processes a search string containing geographic information. Because the function is implemented. Complete location information must be given in geographic coordinates consisting of (geodetic) latitude, longitude and altitude, but it is not necessary to know the altitude to get to a specific location on a general map. Also, the string shown in FIG. 3 seems to be Google's own format, not a standard string of the GET method. Since it is not a string for the purpose of communicating with other apps (apps, applications) from the beginning, it seems to have developed and used its own format. If this is converted into a standard string, it becomes "https://www.google.co.kr/maps?lat=33.113906&lon=126.2683883&zoom=17.5&hl=ko". This is done by moving to a point where the latitude is 33.113906° (lat=33.113906) and the longitude is 126.2683883° (lon=126.2683883) on Google Korea's map (https://www.google.co.kr/maps), and the zoom is 17.5 ( zoom=17.5), but the display language is Korean (hl=ko).

However, it is difficult to determine exactly which point on the map corresponds to the geographical coordinates shown in the address bar of FIG. 3 . It is presumed to be the coordinates of the center of the map, but it is difficult to know where the exact center of the map is in FIG. 3 .

On the other hand, if you put the same string in the search box of the Google Maps app on your Android smartphone and search, 'No search results in Google Maps' is displayed. First of all, Google Maps on a smartphone is not a web app implemented in HTML5/CSS3/JavaScript, but uses a language called Kotlin for Android phones and Swift for iPhones. It is a native app developed using Also, the search bar of Google Maps is not the address bar of an Internet browser. And this is because the Google Maps app has not implemented a function that can process strings displayed in the address bar of a web page in the search bar. Therefore, you can search for 'Marado General's Rock' on Google Maps on your smartphone, but you cannot search by entering a string that appears in the address bar of Google Maps running on your desktop computer.

GPS coordinates are used in aircraft, missiles, self-driving cars, and smartphones. It's hard to find an area where GPS coordinates aren't used. In particular, GPS coordinates are very important in search & rescue missions.

For example, let's assume that a traveler on a Sahara desert tour gets lost and gets in trouble, but luckily has a satellite phone and wants to call the police for rescue. Then you won't be able to call the address once. This is because there will be no road signs in the middle of the desert, and there will be no address itself.

A dune is constantly changing its shape under the influence of the wind. And how likely is it that there are unusual features in the middle of the desert, visible to the naked eye? Therefore, it is impossible to inform the police of one's location by describing the landmark.

The surest way is to check the GPS coordinates on your smartphone and call the latitude and longitude. However, the method of specifying a geographical location using (geodetic) latitude and longitude has many inconveniences in practice. The biggest inconvenience is that it is difficult to guess how far apart two points of latitude and longitude are in terms of distance, since they are not units of distance such as meters or feet.

For example, suppose that you want to bombard an enemy military supply base with self-propelled artillery during war, and you know both the longitude of the self-propelled artillery and the longitude of the supply base. In order to hit a supply base with a high-angle gun, you need to know the exact direction and distance from the self-propelled gun to the supply base. However, calculating this from two geographic coordinates would have been a very difficult calculation in the past without computers.

Also, for example, if you call the latitude and longitude of your location over the phone to the rescue team, but assume that the third decimal place number is called incorrectly, how far is the location corresponding to the incorrectly called longitude and latitude from the actual location of the victim? It's hard to know until you do the math. In other words, assuming that 6 is incorrectly called 8 at the third decimal place, few people will be able to immediately answer whether the error is 1m, 10m, or 1km.

For reference, if latitude and longitude are displayed to eight decimal places, the positional precision is less than 1 mm no matter where you are on the globe. Of course, this means taking into account the size of the Earth, you need other orders of magnitude for the Moon or Mars. On the other hand, the error of a GPS measuring device used for civil engineering/construction is about 2 to 3 cm, and the error of GPS coordinates in a smartphone is about 5 to 15 m.

5 is a conceptual diagram simply illustrating a process of creating a map using the Mercator projection provided by the Encyclopedia Britannica (Source: (https://www.britannica.com/science/Mercator-projection#/media/1/375638/ 231099).The Mercator projection is the most widely known projection among the cartography methods of the cylindrical projection scheme.In the Mercator projection, it is created by first projecting a cylinder in contact with the equator from the center of a sphere and then expanding the cylinder, so the polar regions are It cannot be ^displayed .

6 is an example of a world map created by the Mercator projection (author: Justin Kunimune, source: https://en.wikipedia.org/wiki/Mercator_projection#/media/File:Mercator_with_Tissot's_Indicatrices_of_Distortion.svg). The circles shown in FIG. 6 are called Tissot's indicatrix of deformation, and indicate how the area or shape is distorted depending on the position. If there is no distortion, the Tissot ellipses should all be represented as circles of the same size. 6, it can be seen that the Tissot ellipse increases as the latitude increases, but still maintains a circular shape. That is, the Mercator projection preserves the angle and shape of a small area. Mercator projection is a representative example of conformal projection.

The greatest advantage of the Mercator projection is that it preserves direction, which was especially helpful in navigation by ship using a compass in the past. However, the biggest disadvantage of the Mercator projection is that the area is greatly distorted and the polar regions cannot be displayed as described above. For example, Greenland appears to be the same size as Africa, but in reality the area of Africa is 14 times the area of Greenland.

As the internet map became active, the Mercator projection was revived as the Web ^Mercator projection and is widely used. Web Mercator projection was adopted by Google in 2005 and is currently a projection method adopted by most Internet map service providers, and SRID (Spatial Reference Identifier) is given as EPSG:900913 or EPSG:3857. The official name of EPSG:3857 is WGS 84/Pseudo_Mercator. Webb Mercator projection is also referred to as spherical Mercator. In the Webb Mercator projection, longitudes range from -180° to +180°, but latitudes range only from ±85.051129°.

7 is a conceptual diagram for understanding Web Mercator projection. A point P on the Earth has a geodetic latitude φ, a longitude λ, and an ellipsoidal height h. The ellipsoid point 703 is the point where the normal line (n) drawn from the point P to the earth ellipsoid 701 meets the earth ellipsoid. This normal (n) passes perpendicularly through the tangent plane 704 at the point of the ellipsoid. The radius of the Earth's ellipsoid in the equatorial plane (X-Y plane) is R.

At this time, assume a sphere 706 that shares a center C with the earth ellipsoid 701 and has a radius R. Then draw a straight line (n') parallel to the normal n at the center C of the Earth's ellipsoid. A point 707 where the straight line n' intersects the sphere 706 will be referred to as a sphere point. P' is the point separated by a distance h from this sphere along the straight line n'. The spherical Mercator projection is drawn using the Mercator projection by replacing the point P with P'. That is, a point P having a geodetic latitude φ and an ellipsoidal height h on the earth ellipsoid is regarded as a point P' having a geocentric latitude φ and an altitude h on the spherical Earth.

In this way, after replacing the earth ellipsoid with the spherical earth, assume a cylinder 708 contacting the earth ellipsoid 701 at the equator in order to perform a map projection using the Mercator projection. Then P" is the point where the straight line n' intersects the cylindrical surface 708.

According to this principle, the projection method of the Webb Mercator projection can be written as Equations 9 to 10.

where x is the easting distance in the Webb Mercator projection, λ is the longitude, and R is the radius of the Earth at the equator, equal to the radius a of the major axis of the Earth's ellipsoid. That is, 6,378,137m can be used as the R value. On the other hand, y is the northing distance in the Web Mercator projection method, and φ is the geodetic latitude. The Web Mercator projection uses geodetic latitude and longitude, but assumes that the earth is a sphere, not an ellipsoid, and assumes geodesic latitude to be geocentric latitude, and transfers it to the Mercator projection.

It is also possible to create a map using the ^Mercator projection accurately without approximating the earth's ellipsoid as a sphere. However, although this can be done when creating maps printed on paper, it is inappropriate for use in digital world maps due to the complexity of mathematical operations on the Earth's ellipsoid. In addition, when displaying maps of local regions on the earth, such as the complete map of Korea, a projection with an error of less than mm is possible, but such benefits cannot be expected from Google Maps, which is serviced by Google, a multinational company, for the world. Therefore, the Web Mercator projection is almost a unique choice for map services covering the world.

All map projections involve distortion. In the spherical Mercator projection, distortion occurs in two stages. First, distortion occurs by considering the geodetic latitude φ as geocentric latitude, and second, distortion occurs while projecting from the sphere 706 to the cylinder 708. As can be guessed from FIG. 7, in the Web Mercator projection, the horizontal axis and the vertical axis of the map have distance units, but they differ from actual distances. For this reason, the US Army is warning against using Web Mercator projection maps for military purposes.

Earth's equatorial radius is about 6,378 km, and its polar radius is about 6,357 km. In other words, the Earth's ellipsoid is so close to a sphere that it is difficult to distinguish it with the naked eye. If the earth ellipsoid is regarded as a sphere, the scale of the distance by the Mercator projection projection is given as Equation 10 to Equation 11.

Thus, at the equator (φ = 0°), 1m is represented by 1m, but at 30° latitude, 1m is represented by 1.15m, at 45° latitude, it is 1.41m, at 60° latitude, it is 2.00m, and at latitude 85°, it is 11.47m. is indicated by

The UTM coordinate system (Universal Transverse ^Mercator Coordinate System) was developed in 1947 by the US Army as one of the grid coordinate systems to represent locations on the entire globe as a unified system. 8 is an example of a world map created in the UTM coordinate system (author: Jan Krymmel, source: https://commons.wikimedia.org/wiki/File:Utm-zones.jpg). In the UTM coordinate system, the earth is divided into vertical bands at 6° longitude intervals, drawn in a transverse Mercator projection, and then the location is indicated by vertical and horizontal coordinates with respect to the origin set for each vertical zone (band). The point of intersection of the central meridian and the equator is the origin of each vertical band. While the geographic coordinate system greatly reduces the rectangular shape toward the polar regions, the UTM coordinate system maintains a rectangular shape, so it is very convenient to indicate distance, area, direction, etc.

The UTM coordinate system models the shape of the earth with irregular curvature and ups and downs as a reference ellipsoid. At the time of development, the Clark 1866 ellipsoid was used in the Americas and the International ellipsoid was used in other regions. The UTM projection used in the UTM coordinate system is a transverse drawing of the Mercator projection developed in 1570 by Gerardus Mercator, a Belgian geographer and cartographer. The UTM coordinate system divides the Earth's surface into a total of 60 vertical bands at 6° longitude intervals, starting at 180°W (west longitude), each extending from 80°S (south latitude) to 84°N (north latitude) from north to south. Each vertical strip is numbered 1 through 60, starting from section (180°W-174°W) and extending eastwards to section (174°E-180°E).

9 is a conceptual diagram illustrating a UTM zone (Author: Javiersanp, Source: https://commons.wikimedia.org/wiki/File:Utm-latlon_grid_en.svg), showing the northern hemisphere of Zone 28. For these 60 vertical bands, they are transferred to the map by the transverse Mercator projection with relatively little distortion in the north-south direction. The scale factor at the central meridian of each zone is 0.9996, and is about 1.0010 at the boundary of the zone. The scale factor becomes 1 at a location 180 km east and west of the origin (ie, the intersection of the central meridian and the equator), the scale factor is less than 1 within that range, and the scale factor is greater than 1 in the area beyond 180 km.

Each UTM zone is further divided into 20 latitude bands, which belong to the Military Grid Reference System (MGRS) system rather than the UTM system. Each latitude band is 8° latitude apart. However, the northernmost latitude band (72°N-84°N) is at 12°. From the southernmost (80°S-72°S) band to the northernmost (72°N-84°N) band, alphabetic symbols from 'C' to 'X' are assigned. I' and 'O' are excluded. This is because I can be confused with the number 1 and 'O' with the number 0. Therefore, the symbol for the latitude band (0°N-8°N) bordering the equator in the northern hemisphere is 'N'. Each vertical band, i.e., a band of latitude within a UTM zone, is indicated by a combination of numbers and alphabetic symbols. For example, South Korea belongs to zones 51S, 51T, 52S, and 52T in the UTM coordinate system.

As described above, the UTM coordinate system is an orthogonal coordinate system used for military purposes. ) has the advantage that the distance of a point in the direction can be easily calculated by trigonometry. However, there is a disadvantage in that the process of interconverting the geodetic latitude and longitude obtained from the GPS signal with the northward and eastward distances in the UTM coordinate system is too complicated. Therefore, although it is possible to obtain the UTM coordinate system using a computer or app, it is practically impossible to calculate it with a calculator or handwriting.

In Korea, a 'National Branch Number' is used so that a ^hiker in distress can easily report his or her location by phone. 10 is a photograph of a national branch number information board around Daecheong Lake. Wikipedia explains the country branch number as follows.

The national branch number in Article 2 <Definition> Paragraph 9 of the Road Name and Address Act, one of the administrative laws of the Republic of Korea, is a number assigned to each point that divides the national land and the adjacent sea in a grid pattern (including letters and Arabic numerals). ) says

These national branch numbers are used as a location indicator in emergency rescue activities.

National branch number system

It is represented by combining two Korean characters and eight Arabic numerals, and the whole country is expressed in one coordinate system.

After dividing the country into grids of 100 km × 100 km, the points 700 km south and 300 km west of the UTM-K origin are used as reference points, and Korean characters are given in alphabetical order from west to east and south to north, respectively, from the reference point to each grid. Then, a number is assigned based on the point where the length and width of the grid are divided into 10,000 units of 10 meters each. At this time, the given number is displayed in 4 digits, and in this case, if each integer is less than 4 digits, "0" is inserted in front of it until it reaches 4 digits. The first 4 digits of the branch number indicate the distance to the east, and the 4 digits to the back indicate the distance to the north. For example, "Raa 8485 1333" (Seoraksan Mountain Daecheongbong) means the point 384.85 km east and 713.33 km north of the reference point.

As explained in Wikipedia, this national branch number was developed with the intention of asking the survivor to call 119 for their location after seeing this information board. That is, if you report your location as “Daba 9924 1825” while calling 119, the rescue team can specify the location of the missing person in the range of a square of 10 m in length and width. Although a location can be accurately specified using latitude and longitude, the use of such a national point number system is because, as described above, geographical coordinates are inconvenient for people to remember or dictate.

However, this national branch number system also has inconvenient points. First of all, this national branch number specifies a location with an error range of 10m horizontally and vertically. A margin of error of 10 m is sufficient for use in the rescue of victims, but insufficient for other uses. For example, if you think about a case where a spectator orders chicken and beer (chicken and beer) over the phone at a baseball stadium, there will be about 100 people in a square of 10m x 10m. Therefore, even if the country branch number is called, the delivery person will not know who the customer is unless he shouts "The person who ordered chicken and beer!" In addition, if a person in distress on Daecheong Lake cannot find a national branch number sign nearby, he or she cannot receive help from the national branch number system.

An app (what3words) from a British company (What3words Limited) uses three words to specify a location on the globe. 11 captures a part of the page introducing this app (https://what3words.com/products/what3words-app), and it can be seen that latitude/longitude pairs are replaced with three words.

In [Special 1], the principle of this technology is explained in the following points. After receiving the geographical coordinates of a place from the location determining means, transform them into one big integer n, which is then decomposed into three integers (i, j, k). do. Then, the decomposed three integers are replaced with three words and used as location identifiers.

Geographical coordinates are pairs of latitude and longitude, using latitude and longitude to six decimal places. This is the precision that can specify a position on the earth with an error range of 3m horizontally and vertically. A smartphone's GPS sensor has about this accuracy.

The task of converting a pair of latitude and longitude into an integer n, decomposing it into three integers (i, j, k), and substituting it into three words again is a server using a lookup table. ) runs on

The user can use these three words to remember or record the location of the place, use them to call their location or a third destination to others, or send them as text messages. The receiver can obtain geographical coordinates from these three words and display the corresponding location on a map.

12 is the closest subway station exit to the applicant's office found in this app. As can be seen in FIG. 12, a 3m × 3m square area near Exit 9 of Jungangno Station on Daejeon Subway Line 1 is specified by three words: 'suspect', 'civil', and 'bikers'. If you press the share button at the bottom, you can send it to others by text message, and the text message includes an internet link called https://w3w.co/suspect.civil.bikers. When the received text message is clicked, the map is executed and the screen shown in FIG. 13 is obtained.

[Special 2] discloses a technology in which two or more users (Buddy) registered in a watch list share their location in both directions using a GPS sensor of a mobile phone and a dedicated server (Buddy Watch server) connected to the Internet. . The process of registering a user to the watchlist can be permanent or temporary on an ask/accept basis, and the user can arbitrarily stop sharing their location.

[Special 3] discloses a method of confirming the location of another mobile phone on a map based on a request/acceptance using a GPS positioning system and a mobile communication network.

In [Special 4], the sender sends a text message embedded with a map to the recipient so that the recipient can check the location of the sender and the recipient at the same time, and the location of the two people on the map is displayed in real time. A technique to be updated is disclosed.

In [Special 5], the geographical location of the sender's smartphone is converted into encoded data using two or more alternatively selectable means such as email or text message. A method of transmitting to a receiver and sharing the sender's location is disclosed.

In [Special 6], the recipient receives a text message from the sender and processes it to display the sender's location on a map, but the text message hash a longer URL including the sender's location A method of including a hash-processed short URL is disclosed.

[Special 7] discloses a technique in which a sender and a receiver continuously share a location for a predetermined time and end sharing the location when the specified time elapses.

In [Special 8], emergency information can be sent to an emergency contact with just a simple button operation of the mobile communication terminal to notify an emergency situation, and security can be maintained by switching the mobile communication terminal to silent/matte mode. Disclosed is an emergency call processing device using a mobile communication network for

[Special 9] approximates the ground surface to a three-dimensional curved surface, divides the three-dimensional surface into a number of cells, and then uses a three-dimensional curved coordinate system for each cell. A method of specifying a three-dimensional position on the earth by applying a curvilinear coordinate system is disclosed.

[Special 10] discloses a technology capable of inserting a marker and text into a panoramic image along with geographic coordinates and transmitting the same through a pre-set sharing link.

On the other hand, due to rapid urbanization, most of the world's population lives in cities, and many buildings are multi-story buildings with two or more floors. Therefore, if you want to display complete information of a specific building on an online map, an indoor map that shows the structure and information of a specific floor when the user selects it is essential. An indoor map is basically an optional display of additional information on the floorplan of a building. Indoor maps can be used independently, but their usefulness increases significantly when linked with outdoor maps.

Google started providing digital map service running on the web in February 2005, and indoor map service started in March ²⁰¹¹ . If you search for 'Google Indoor Maps' in Chrome, you can find a page introducing Google's indoor map service (https://www.google.com/intl/en/maps/about/partners/indoormaps). An example of an indoor map is showing Madison Square Garden in New York, USA. Here, if you click the link marked 'View on Google Maps', the screen shown in Figure 14 is displayed (Source: https://www.google.com/maps/place/%EB%A7%A4%EB%94%94 %EC%8A%A8+%EC%8A%A4%ED%80%98%EC%96%B4+%EA%B0%80%EB%93%A0/@40.7505029,-73.9936424,19z/data=!3m1! 5s0x89c259ae1546fb27:0x93ba42deb43c8368!4m12!1m6!3m5!1s0x89c25a21fb011c85:0x33df10e49762f8e4!2z66ek65SU7IqoIOyKpO2AmOyWtCDqsIDrk6A!8m2!3d40.7505045!4d-73.9934387!3m4!1s0x89c25a21fb011c85:0x33df10e49762f8e4!8m2!3d40.7505045!4d-73.9934387).

As shown in FIG. 14, an indoor map is overlapped and displayed at the correct position on an outdoor map, and a 6K floor is shown on the introduction screen. In addition, the mini home page of Madison Square Garden is shown on the left side of the screen, and there is a menu to select other floors on the right side.

In FIG. 15, the map screen is enlarged to show the east side of Madison Square Garden, and in FIG. 16, the floor is changed to the second basement floor (-2). If you select a different floor like this, the floorplan of that floor is replaced and displayed.

[Special 11] discloses a technique in which a network server provides indoor map features to a client device. When a user requests outdoor map data for a specific geographic location and zoom level, the network server checks whether there is a multi-floor building among the outdoor map data, and then maps the indoor map of the default floor for the multi-floor building. and an indoor map indicator are displayed on the user device, and the indoor map is selectively displayed as the user manipulates the indoor map indicator.

[Special 12] to [Special 13] disclose a technology for selecting a floor of a multi-story building from an interactive digital map. The external representation of a multi-story building is displayed on the digital map, and when the user selects a point on this external representation, a 3D model of the building is displayed, with the floor plan of the building partially overlapped. do. When the user swipes the model vertically, the floor plan of the selected floor is activated in a way that distinguishes it from the floor plans of the other floors.

[Special 14] discloses a technology capable of providing indoor location information even when GPS location information cannot be found, and providing location information and map information-based services through an open API. To this end, the location on the indoor map is estimated based on the location, identification information, and signal strength of the indoor map of the building and the wireless access point (AP) installed indoors.

In the conventional invention disclosed in [Special 15] to [Special 16], a new coordinate system for specifying an indoor/outdoor position on the earth is disclosed. The structure of this coordinate system is similar to that illustrated in FIG. 7 . In other words, it is assumed that a point P on the earth with geodetic latitude φ and longitude λ is a point with geocentric latitude φ and longitude λ. And in this coordinate system, the geographic location is specified using a pair (N, E) of northing distance N and easting distance E instead of a pair of geodetic latitude and longitude (φ, λ), and a cylindrical projection ( cylindrical projection) is not applied. This coordinate system is not a coordinate system for creating a map, but a coordinate system for specifying a location anywhere on the earth with the same margin of error.

17 is a diagram for explaining the concept of northbound distance and eastbound distance used in the prior art. In FIG. 17, a sphere whose center is located at the center of mass of the Earth is assumed, and the radius of this spherical model Earth is R. The R value can use 6,378,137 m, the radius of the earth at the equator.

The origin C of the World coordinate system, that is, the Earth-Centered Earth-Fixed three-dimensional Cartesian coordinate system, is located at the Earth's center of mass, and the Z-axis coincides with the Earth's axis of rotation. , the X-axis is a straight line passing through the intersection of the equator and the prime meridian at the origin, and the direction of the Y-axis is automatically determined by the principle of Right-Handed coordinate system (RHS).

At this time, the northward distance N and eastward distance E of a point having geodetic latitude φ, longitude λ, and ellipsoidal height h are measured as follows. Similar to FIG. 7, a point having geodetic latitude φ, longitude λ, and ellipsoidal height h is replaced with a point P having geocentric latitude φ, longitude λ, and geocentric altitude h. The point where the line segment from the origin C of the world coordinate system to the point P intersects the sphere is called the sphere point S(φ, λ), and the point where the equator L _o and the prime meridian meet is called the origin of the latitude-longitude line. ) is referred to as O. And the point w where the parallels, parallels of latitude, and lines of latitude with the geocentric latitude φ and the prime meridian meet is called a waypoint. Then, the northward distance is defined as the length of an arc measured along the prime meridian from the origin O of the longitude line to the path point, and the eastward distance is defined as the latitude line from the path point to the sphere point S(φ, λ) having geocentric latitude φ and longitude λ. Therefore, it is defined as the measured arc length.

However, by generalizing this concept, it is possible to move the starting point of measurement of northward and eastward distances from the origin O of the longitude line to another reference point on the earth's surface with geodetic latitude φ _o and longitude λ _o . Then, the reference point is the point of intersection of the line of latitude with geodetic latitude φ _o and the meridian with longitude λ _o , the northbound distance is the length of an arc measured along the meridian from the reference point to the route point, and the eastward distance is the geodetic latitude from the route point. It is the length of an arc measured along the latitude line to the ball point S(φ, λ) with φ and longitude λ.

According to this definition, the northward distance is given as Equation 8 as a function of the geodetic latitude φ and longitude λ, and the Eastward distance is given as Equation 9.

where R is the average radius of the earth, N _o is the base value of the northward distance, E _o is the base value of the eastward distance, φ _o is the geodetic latitude of the reference point, and λ _o is the longitude of the reference point.

Using this formula, any point on the Earth can be used as a reference point. For example, the position of the statue of King Sejong in Gwanghwamun Plaza can be used as the reference point of the coordinate system. Alternatively, the Sejong reference point can be used for use only within the territory of the Republic of Korea, and the default values for the distance northward and eastbound can be given so that the distance northward and eastbound always have positive values within the territory of the Republic of Korea.

On the other hand, if you want to use one unified coordinate system for the whole world, the reference point for measuring the northward and eastward distances is the south pole (φ _o = -90°) in latitude and the antimeridian (λ _o in longitude) = -180°), and the default values for northbound and eastbound distances can be set to 0 (N _o = 0, E _o = 0). The reason for choosing such a reference point is to ensure that distances heading north and east have positive values all over the globe, and to prevent discontinuities in distances going north and east in densely populated areas such as London. because it can

By this selection, the northward distance is given as in Equation 14, and the eastbound distance is given as in Equation 15.

Inversely, formulas for obtaining geodetic latitude and longitude from northward and eastward distances are given as Equations 16 and 17.

Table 1 shows the northward and eastward distances of representative places on the earth in this coordinate system.

number	Place	geodetic latitude	Hardness	North facing street	East street
One	longitude and latitude origin	0°	0°	10,018,754.171m	20,037,508.343m
2	antipode	0°	180°	10,018,754.171m	40,075,016.686m
3	North Pole	90°	0°	20,037,508.343m	0.000 m
4	Antarctica	-90°	0°	0.000 m	0.000 m
5	Sejong Standard Branch	36.5222134°	127.3031899°	14,084,388.370m	27,491,115.402m
6	Sydney Opera House	-33.8567844°	151.2152967°	6,249,834.172m	30,618,651.175m

As can be seen from Table 1, the distances north and east have finite positive values at all points on the globe. On the other hand, when calculating the northward and eastward distances of representative points within the territory of the Republic of Korea, Table 2 is shown.

number	Place	geodetic latitude	Hardness	North facing street	East street
One	Sejong Standard Branch	36.5222134°	127.3031899°	14,084,388.370m	27,491,115.402m
2	Daejeon Jungang-ro Intersection	36.3286936°	127.4259233°	14,062,845.844m	27,570,728.707m
3	Mt. Baekdu Cheonjiyeon	42.0072268°	128.0564190°	14,694,977.268m	25,481,535.991m
4	southernmost tip of Korea (Marado)	33.1138727°	126.2684738°	13,704,973.619m	28,556,380.328m
5	Dokdo Territorial Signpost	37.2399286°	131.8684690°	14,164,284.060m	27,638,526.094m
6	Seogyeolbido	36.6115719°	125.5439153°	14,094,335.712m	27,302,128.877m

As can be seen in Table 2, if you want to specify an arbitrary location within the territory of the Republic of Korea with an error range of 1 m ² , you can indicate the distance to the north and the distance to the east with 7 digits, respectively. For example, if this coordinate system is intended to be used only in Korea, the coordinates of the Dokdo territorial marker can be specified as 4,164,284m northbound and 7,638,526m eastbound. In the national point coordinate system, the position in the horizontal direction is specified with an error range of 10m × 10m with two Korean characters and two 4-digit numbers, whereas in the coordinate system of [Special 15], the position in the horizontal direction is specified with two 7-digit numbers and 1m × 1m. Considering that it is specified with an error range, the cost of displaying or transmitting coordinates can be considered equal.

Like the what3words app, the usefulness of the country point coordinate system comes into play when dictating your location over the phone. By the way, the area that can be called is also text message (text message). Therefore, if reporting by text message rather than dictating by phone, it is okay to send two 7-digit numbers.

Moreover, the national point coordinate system cannot calculate the national point coordinate system from the geographic coordinate system or conversely calculate the geographical coordinates, that is, latitude and longitude, without using a computer or application. It has the advantage that it can be calculated using it, and it can be approximated even with only paper and pencil.

Meanwhile, most modern people live in cities. In the city, there are numerous buildings such as apartments and commercial buildings, and for modern people who live or work in indoor spaces, geographical location that can be specified by latitude and longitude, as well as the indoor location when inside the building, integrally specifying the location We need a way.

In multi-story buildings such as apartments, underground shopping malls, buildings, and parking towers, floor information is more important than elevation. For example, if you are meeting someone in a tall business building, information about which floor you are on is more important. In addition, at least once, everyone will have experienced a disappointment when they parked their car in an underground parking lot and forgot how many floors they parked in the basement. For these various reasons, floor information is more useful than elevation.

18 is a conceptual diagram for understanding the layer model used in the conventional invention of [Special 15]. In order to describe the entire Earth with a simple mathematical model and a consistent concept, it is preferable to call the ground floor layer 0. In addition, the ground surface, the surface of a lake, and the sea level in the middle of the sea are all considered as layer 0. Here, the 0th floor refers to the ground surface where people can walk around on their feet in a natural state and the floor of a building continuously connected to the ground surface. Therefore, even if Gapdori jogs along the riverside road, swims in a lake, or finds a store he likes and enters the store from the sidewalk, it is all on the 0th floor. Also, when you have climbed Mt. Baekdu or Mt. Everest and are singing hurray at the top of the mountain, you are still on the 0th floor. That is, in the invention of [Special 15], the 0th floor has nothing to do with the height of the ellipsoid or the altitude above sea level. On the other hand, the layer we call the second layer is the +1 layer, and the third layer is the +2 layer. In addition, the first basement floor is the -1 floor, and the second basement floor is the -2 floor.

In [Special 15], the altitude of the ground center, the height of the ellipsoid, and the altitude above sea level are all ignored, and the integer F representing the floor is used instead. In addition, the northward distance N and the eastward distance E are used for the location in a horizontal space. And the integer F representing the layer is optionally used. In other words, if the location of a point is specified as (N, E, F), this means the F floor of a building with north-facing street N and east-facing street E. In practice, the geodetic latitude and longitude on floor F of a building denotes a particular point corresponding to a distance N north and a distance E east. On the other hand, if you only write (N, E), it means (N, E, 0). That is, it may mean an outdoor place where the concept of a floor is not required, or it may mean the first floor of a multi-story building. In this way, the concept of a floor can be logically extended from the inside of a building to the outside to specify the indoor/outdoor locations integrally.

This model can be used for a variety of purposes, such as ordering food to be delivered, delivering mail, making an appointment with someone, or visiting a restaurant found on the Internet in a large city with many multi-story buildings.

[Special 17] suggests a map-based online platform based on such a location identifier. 19 is a conceptual diagram showing the configuration of a digital map system of the related art that provides indoor map service in the form of a web app. When a user of a smart phone or desktop computer, or a delivery robot accesses a web server through the Internet, Google Chrome or Microsoft Edge You can use a digital map using a web browser such as (Microsoft Edge). Since the digital map works as a web app, the web server and app server are effectively the same. Therefore, both the terms web server and app server can be used.

A user who wants a digital map service directly accesses a web server using a computer or smartphone, and the web server includes an outdoor map server, a building database, and a building data store. data store, building data warehouse). It can be said that they are integrated to constitute the hardware of a digital map system.

An outdoor map server is a server that provides map tiles to a web server to draw an outdoor map. For example, a service server of Open Street Map (www.openstreetmap.org) providing tile service may be regarded as an outdoor map server.

The building database is a database capable of inquiring information related to a building, such as a building name, address, homepage, geographical location, and a location where a building's outline drawing file or floor plan file is stored.

The building data store is where vector data is stored as indoor map files, including building outline drawings and floorplans per level. . Building data storage can be thought of as Network Attached Storage (NAS) connected to the Internet, and as users and content grow, it can be one or more devices or servers. The web server fetches the indoor map file from the building data store and draws it overlaid on the correct location on the outdoor map.

In the conventional method, the map app could be used as a web app on a PC and as a native application on a smartphone. To this end, a web site for digital maps is created using HTML5/CSS3/JavaScript for PC, a native app is created with Kotlin for Android phones, and a native app is created for iPhone using Swift. Kotlin is similar to Java, and Swift is similar to C++. In the end, the app must be written in three independent languages: JavaScript, Kotlin, and Swift, and three times the effort is required to maintain and maintain the app.

The biggest advantage of the web app is that it can respond to both PC and smartphone with a single source, and there is no need to write, maintain, and maintain a separate app. The reason this is possible is because there is a great piece of software available in web browsers called JavaScript. That is, there is a common platform that exists across PCs and smartphones. It is for this reason that software, which used to be used by installing a program contained in a floppy disk or USB (Universal Serial Bus) on a PC in the past, can now be used by accessing the web and paying a fee. to be. In addition, due to the remarkable development of web technology, professional programs such as Microsoft Word and AutoCAD can be made into web apps.

On the other hand, the biggest drawback of web apps is that you have to access the website every time. For example, if you want to use Microsoft Word written as a web app, your PC or smartphone must be connected to the Internet, and you must visit the website every time to work on the word. When a website is visited, a client, that is, a web browser, connects to a host, that is, a corresponding web server, fetches necessary files, and creates and displays a web page.

Let's say there's a writer who wants to write a book using Microsoft Word, which was created as a web app. The writer probably uses only a few familiar features of Microsoft Word's many features on a daily basis. However, if you use Microsoft Word as a web app, you have to bring the source code you brought yesterday and bring it tomorrow as well. Moreover, the source imported today may be exactly the same as the source imported yesterday. However, if you have to import the source every time, it is an extremely inefficient system.

If the writer had the luxury of sitting at a picnic table in the park and writing his manuscript while gazing at the beautiful scenery, expect to pay for the data that brings the same source to the Wi-Fi every time, and slow down the app. can do. This has been pointed out as the biggest drawback of web apps.

These drawbacks were addressed with the development of an innovative technology called Progressive Web App (PWA). A PWA is an installable web app. In order for a web app to become a PWA, several conditions must be satisfied. First of all, you must use https protocol, not http, and have a JavaScript file called service work. You also need a manifest file and an icon file to be displayed on the desktop of your computer or smartphone.

If you access the address of the Progressive Web App with Chrome on your smartphone, the PWA will run and the 'Install' button will appear. If you click this button, the PWA is installed on your smartphone and an icon appears on the desktop. When the PWA is installed, necessary files are also saved semi-permanently on the smartphone. So the next time you connect, you don't have to import the same file again. If you access a new page, or if there is an updated part of the software, only that part is newly imported. Therefore, it can be said that the biggest drawback of web apps has been removed with the advent of PWA.

As we have already seen, Google Maps provides indoor maps for large multi-story buildings. When the zoom of the map exceeds the preset value, the floorplan of the default floor of a large building that provides indoor map service is displayed, and a menu for selecting other floors of the building appears on the map screen. looks on one side of If you select a different floor from that menu, the floor plan of the base floor is displayed replaced with the floor plan of that floor.

While this seems intuitively reasonable, it's actually more appropriate in an era when everyone sat in a chair and looked at maps on computer monitors. It's not the best way now, when everyone has a smartphone and self-driving cars and unmanned delivery robots are increasingly becoming a reality.

When a map app is executed on a smartphone, the location of the smartphone is calculated from GPS signals and displayed on a map. In other words, if you run a digital map on your smartphone, you can display your current location on the map, and you can program the map to pan automatically so that your location is always in the center of the map. Therefore, if the owner of the smartphone enters the inside of a building, a menu for selecting a floor can be displayed without clicking the mouse or touching the screen. That is, if the current location is inside a multi-story building where a floor can be selected, it would be convenient to display a menu for selecting a floor without clicking or touching.

In this method, if the owner of the smartphone continues to stay on the ground floor, he can ignore the floor selection menu, and if he intends to move to another floor using the stairs or elevator, the floor plan of the corresponding floor is displayed in advance through the floor selection menu. It will be convenient to check. In addition, in the case of a desktop computer or laptop, assuming that the center of the map screen is your location, and panning the map screen, if the center of the map is located inside a building that provides indoor maps, a floor selection menu will be automatically displayed. can In addition, when combined with various technologies that can identify floors, it will be possible to automatically change the view of the floor plan when the floor is changed.

20 shows the main window of a digital map. In the past, maps printed as a single sheet on a large sheet of paper or divided into regions and printed as a book were essential for travel. But now, with the popularization of computers and smartphones, digital maps have taken their place. The greatest advantage of a digital map is to move the center of the map screen to the place of interest (translate, move), zoom to the necessary magnification (zoom), and also to compare the map with the actual landscape in front of you. It will be a point that can change direction (rotate). The basic concept for implementing convenient functions that were not available in paper maps like this is a view.

In order to understand the concept of a view, it is necessary to first understand the concept of a JavaScript object. MDN Web Docs describes JavaScript objects as follows (source: https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object).

An object class represents one of JavaScript's data types. It is used to store collections of values with various keys and more complex entities. Objects can be created using the Object() constructor or object initializer / literal syntax. Object() constructor or the object initializer / literal syntax.)

For example, a user-defined object called coordinates could be defined as:

var coordinates = { lat: 36.0, lon: 127.0 };

Here, lat and lon are keys, and 36.0 and 127.0 are values. For example, the value of lat can be obtained with coordinates.lat.

If the map of Korea or the world is the entire map, a part of the map viewed on a computer or smartphone, or an object showing the map, can be considered as a view. OpenLayers, a representative client-side open source software related to maps, defines a view as follows (source: https://openlayers.org/en/latest/ apidoc/module-ol_View-View.html).

A view object represents a simple two-dimensional view of a map. You can apply map center, resolution, and rotation operations to this object. A view has a projection method. This projection determines the center of coordinates, and the units of this view determine the units of resolution. The default projection is spherical Mercator (EPSG:3857) (A View object represents a simple 2D view of the map. This is the object to act upon to change the center, resolution, and rotation of the map. A View has a projection The projection determines the coordinate system of the center, and its units determine the units of the resolution (projection units per pixel).The default projection is Spherical Mercator (EPSG:3857).).

Other maps such as Google map, BingMap, OpenStreetMap, Naver Map and Kakao Map all use a similar concept. Thus, you can think of a view as an unofficial but common concept used by virtually all digital maps.

The most essential element of a digital map is a view, and it is desirable to have a side panel to facilitate user interaction. 20, the view has a rectangular shape, and the range of the outdoor map visible in the view is called a view extent. The view range can be expressed as the minimum and maximum values of the longitude and maximum values of the outdoor map visible in the view, or the minimum and maximum values of the latitude, or equivalently, the minimum and maximum values of the eastward distance and the minimum and maximum values of the northward distance in the Web Mercator projection. .

In the present invention, a view is referred to as a map screen or simply a screen for convenience. In addition, a part of the map visible in the view range among the entire map will be referred to as a map area. The first map screen that is displayed when the map app is started is referred to as the initial screen.

In the map platform, a map is a JavaScript object that has views, layers, and targets. Openlayers describes the map object as follows (source: https://openlayers.org/en/latest/apidoc/module-ol_Map-Map.html).

Maps are a key element of OpenLayer. The map is the core component of OpenLayers. For a map to render, a view, one or more layers, and a target container are needed. Here, the target container refers to a document element (DOM element) to which a map is attached in an HTML document.

The simplest map object can be given as:

var osmLayer = new ol.layer.Tile({

source: new ol.source.OSM()

});

var view = new ol.View({

center: [0, 0],

zoom: 1

});

var map = new ol. Map({

view: view,

layers: [osmLayer],

target: 'map'

});

Here, the center of the view is set as the origin ([0, 0]) of the distance east and north, the zoom is set to 1, and a DOM (Document Object Model) element called map is created in the HTML document. Yes, which means attaching a map to that map element. Also, the map tile to be displayed on the map uses OpenStreetMap (OSM).

Digital maps accessed through the Internet differ in what is displayed on the view depending on the zoom level of the map. The zoom level of a typical map can vary from 0 to 24 degrees. And, when the zoom level increases by 1, the area shown in the view is reduced to 1/4, and conversely, the map is enlarged by 4 times.

20, there is a center marker at the center of the view. The coordinates of the view center are (geodetic) latitude and longitude, the northward distance (N) given by Equation 14 and the eastbound distance (E) given by Equation 15, etc., on the side panel or control window ( displayed in the control pane.

In addition, OK Venture Town is shown in the view in FIG. 20 . When the center of the view is located within the outline of this building - hereinafter referred to as the building at view center -, the building name is displayed on the left side panel. Since the building is a three-story building, a floor selector appears where you can select a floor.

21 is a part of JavaScript code written in OpenLayers grammar, and shows the configuration of a map object. The layer of map object is composed of baseLayer, buildingLayer, buildingLabelLayer, floorplanLayer, spaceLabelLayer, unitAreaMarkLayer, and locationMarkerLayer. Layers that are declared first are drawn first, so baseLayer is at the bottom and locationMarkerLayer is at the top. baseLayer is a layer that receives map tiles from OpenStreetMap as picture files and draws an outdoor map. The baseLayer is a raster layer, and all others are vector layers.

locationMarkerLayer is a layer for displaying a user's location or a compass on a map, and unitAreaMarkLayer is a layer for displaying a unit area.

The remaining layers except baseLayer, locationMarkerLayer, and unitAreaMarkLayer form a structure layer group. Among them, buildingLayer is a layer for drawing a building outline, and floorplanLayer is a layer for drawing a plan view of any one floor among floorplans per level of a building. buildingLabelLayer is a layer for displaying key information related to the building, such as the name of the building or homepage address, and spaceLabelLayer is a layer for showing each other of individual spaces shown in the floor plan. For example, each room can be a single space.

Although FIG. 21 is just one example, there is a map layer group that displays an outdoor map first, and a structure layer group for showing the outline or floor plan of a building as a vector layer on top of that. It is important that there is In FIG. 21, the map layer group is a layer group having only one layer (ie, baseLayer), but in an example in which a general map and a satellite map are used together, the map layer group also has a plurality of layers. Also, the structural layer group may be composed of several layers. The reason for configuring multiple layers like this is to do structural programming.

As such, the embodiment of the prior art integrates an indoor map including an outdoor map and a floorplan of a building on a view (map screen) of a digital map. provides a way to display 22 is a flowchart illustrating an entire process of displaying a digital map in an embodiment of the related art. This includes maintaining an outdoor map server, a building data store that manages building outline drawings and floorplans in individual folders for each building. ), and maintaining a building database that manages map setting data of buildings.

The map setting data stored in the building database includes the unique building identification number (primary ID, bldID) of each building, the full path to the individual folder, the number of floors of the lowest floor (minFloor) and The number of floors of the highest floor (maxFloor), the zoom level for showing building outline (zoomShowBld, zoom level for showing building outline), the zoom level for showing floor plan (zoomShowFloor, zoom level for showing floorplan), and the northing distance corresponding integer ) I and the easting corresponding integer J.

When the user starts the digital map, the outdoor map is displayed in the view with the initial map settings, and the view is updated according to the user's zoom, pan, and rotate selections. include Renewing the view not only updates the outdoor map, but also zooms, pans, and rotates the outlines and floor plans of the buildings included in it.

In the preset data of the digital map, there is an absolute zoom threshold value for displaying the floor plan of the building. For example, it is neither possible nor necessary to display the floor plans of all buildings in Korea when viewing the map of Korea. Therefore, a zoom level that needs to show a floor plan for some buildings with a zoom higher than a set value may be set to 15, for example. In this way, if the zoom of the digital map is greater than or equal to a preset value, a building database is searched and a list of buildings whose geographic locations are included in a view extent is prepared.

23 is a flow chart illustrating a floor plan display subroutine for displaying a floor plan for the first time in a view. If the number of buildings in the view range building list Bld_ID is greater than 0, a recursive loop such as a for loop is started, and the for loop starts with the first building in the list (i = 0). This first building is given by Bld_ID[0], and the last building is given by Bld_ID[Bld_ID.length - 1].

Here, the view range building list (Bld_ID) is the center coordinates of the building, or a list of buildings in which all or part of the building is located in the view and registered in the building database. However, some buildings may be too small to display at this zoom level. Therefore, for each building in this list, the building outline is displayed only when the zoom level of the digital map is greater than the zoom level (zoomShowBld) displaying the outline. In addition, a list of buildings to be displayed with outlines - referred to as a list of buildings to display outlines (bldIDsToShow) - is extracted and managed from the list of buildings in the view range. If this building, that is, the i-th building, is a building in the list of buildings to be outlined, the building outline drawing of this building is fetched from the data store and added to the buildingLayer.

For outdoor maps, tiles to be displayed on the map are automatically determined when the geographic location and zoom level to be displayed on the view are determined. In most cases, a square raster file produced in the form of a png file is used as a map tile. However, the indoor map must be overlapped on the outdoor map, and when the user selects another floor, another indoor map, that is, a floor plan of another floor, must be displayed, so it is difficult to provide a service in the same tiled manner as the outdoor map. Therefore, the indoor map should be managed as separate data from the outdoor map, stored in a data store, and then retrieved when necessary and displayed superimposed on the outdoor map.

In this way, in order to be stored in a data storage and provided to a web server, it is desirable to create an indoor map as a text-based vector file, and the most suitable file format for this is GeoJSON. According to the official website (https://geojson.org), ^GeoJSON is a format for encoding a variety of geographic data structures.

According to the Korean Wikipedia site (https://ko.wikipedia.org/wiki/GeoJSON), "GeoJSON (GeoJason) is an open and open standard format designed to systematically represent terrain based on geographic points. This is JSON. It is a file format that uses Javascript Object ^Notation ." Therefore, it is desirable to create outline drawings and floor plans in GeoJSON format.

The outline of the building should be given as a closed curve or polygon. However, the GeoJSON format does not allow curves, so in reality it should only be given as a polygon. If the outline is given as a polygon, it can be determined whether the view center is inside or outside the polygon.

The coordinates of any one point constituting the vertex of a polygon are given in the form of [distance east, distance north] or [longitude, latitude]. In JavaScript, square brackets [] denote an array. So, when you add this outline drawing to the buildingLayer, it is automatically added to the correct location.

Next, if the zoom level of the digital map is greater than the zoom level (zoomShowLabel) displaying the label including the name of the building for the buildings in the building list to display the building outline, the label of the building is displayed as the building label. Add it to the layer (bldLabelLayer).

Next, for the buildings in the list of buildings to be displayed as outlines, it is investigated whether the zoom level of the digital map is greater than the zoom level for showing floor plans (zoomShowFloor, zoom level for showing floorplan) of the buildings, and the zoom level of the digital map is the zoom level for showing floor plans. For buildings taller than the level, check again if the building has a +ground floor. This can be found by examining whether the lowest floor (minFloor) of the building is less than or equal to 0 and the highest floor (maxFloor) is greater than or equal to 0.

Next, a list of buildings that have passed both of these tests (hereinafter referred to as a list of buildings subject to floor plan display) is created, and for the buildings in this list, floor plans of the ground floor are retrieved from the data store and the corresponding buildings are displayed. It is displayed by overlapping to match the outlines. Since the locations of the points in these floor plans are all given in the form of [distance to the east, distance to the north] or [longitude, latitude], adding the floor plan to the floorplanLayer will give you the outline of the building and the ground floor. All of the floor plans are displayed in the correct location on the outdoor map.

What has been described so far is a flow chart from the beginning of a digital map to the first view of a building's floor plan. A map update process may then repeat the above process, such as zooming, panning, or rotating operations to add a new floor plan, move an existing floor plan, or remove some of the existing floor plans. have. That is, after initializing the already created view range building list, the outline display target building list, and the floor plan display target building list to 0, and removing all outline drawings and floor plans in the view, start again from the update view step. may start

However, it is very inefficient to remove all building outline drawings or floor plans and draw them again whenever user interaction occurs. Therefore, the map update subroutine is similar to the previous process, but the floor plan display subroutine is mainly different, except for the view range building list (Bld_ID), outline display target building list (bldIDsToShow), and floor plan display target building list (floorplanIDsToShow). In addition, it is more effective to use an algorithm that separately maintains and updates the outline display building list (bldIDsInView) and the floor plan display building list (floorplanIDsInView). That is, when the view is changed, after newly creating the view range building list and the outline display target building list, comparing with the outline display building list, deleting or updating the outline drawing of the existing building and adding the outline drawing of the new building It includes steps, and it goes through the same steps in relation to the floor plan.

A digital map system that performs this function includes an outdoor map server and data that manages building outline drawings and floor plans of buildings in individual folders for each building. A data store, a building database that manages map setting data of buildings, and outdoor maps and floorplans of buildings in views. A computer program stored on a medium that executes a series of stages to integrally display an indoor map containing

The above sequence of steps includes starting the digital map with initial map settings, displaying the outdoor map in the view, and updating the view according to the user's zoom, pan, and rotate selections. and, if the zoom of the digital map is greater than or equal to a preset threshold zoom value, the building database is searched and the view range building whose geographic coordinates are included in the view extent. Creating a list, and executing a floorplan display subroutine and a floor selection subroutine if the number of buildings in the view range building list is greater than zero.

In the coordinate system of the prior invention disclosed in [Special 15], the geographic coordinates of the centroid of OK Venture Town, where the applicant's office is located, are given as geodetic latitude 36.32981409 ° and longitude 127.42671111 °, from which Equation 14 Using and 15, N = 14062970.577m and E = 27570402.871m are given as northbound distance N and eastbound distance E, respectively. The northing corresponding integer I and the easting corresponding integer J, rounded off of the northing distance N, are given as 14062971 and 27570403, respectively. From this, if you calculate the name of the folder that stores the building outline drawing (Bld.geojson) and floor plan (G.geojson, F1.geojson, F2.geojson) of OK Venture Town, it is given as N14062971E27570403. Therefore, the building file of OK Venture Town, which is a three-story building, is stored in the following structure.

property	folder path	folder name	file name
building outline file	https://map.digitalearth.land/datastore	N14062971E27570403	Bld.geojson
1st floor plan	"	"	G.geojson
2nd floor floor plan	"	"	F1.geojson
3rd floor floor plan	"	"	F2.geojson

First of all, the data store is located at https://map.digitalearth.land/datastore. Each building in this has its own folder, and OK Venture Town exists in a folder called N14062971E27570403. OK Venture Town, a 3-story building, has a total of 4 files stored including the floor plan of the 1st, 2nd and 3rd floors and the outline drawing of the building. In such a file structure, an indoor map can be effectively displayed on top of an outdoor map using the algorithms shown in FIGS. 22 and 23 .

When trying to use the web app of the prior invention on a desktop computer and a smartphone, the first problem to be solved is to cope with the large difference in screen resolution. Also, unlike desktop computers, smartphone users use their smartphones vertically (portrait mode) or horizontally (landscape mode). Therefore, in the case of a smartphone, it is necessary to respond to the orientation of the smartphone.

This problem can be solved by using CSS3's media query or a JavaScript library that uses it. Using media query, you can know the screen size of the client running the web. In reality, there are various definitions of screens, such as window, screen, and viewport, and their sizes are all different. Even in the case of a screen, there are separate outer sizes (outerWidth, outerHeight) and inner sizes (innerWidth, innerHeight). However, in order to understand the concept of the present invention, it is sufficient to know that the size and orientation of a desktop or smartphone screen can be obtained using media queries.

On the other hand, if you use a specialized JavaScript library, you can find out the identity of a specific client. In other words, it can also tell if the client is an iPhone 5 or a Samsung Galaxy 22. 24 illustrates a method of responding to desktop computer and smartphone portrait mode/landscape mode using the same core code.

When a user accesses a corresponding site (https://map.digitalearth.land) with a web browser of a desktop computer or smart phone, an index page (index.html) existing on a server of the Internet address is executed. The index page uses media queries or JavaScript libraries to determine the type (desktop computer, tablet PC, smartphone) and direction (screen mode, orientation) of the client accessing the web, and then creates a suitable landing page. redirect to That is, if the client is a desktop computer, the indexDesktopLandscape.html page is executed, if the client is a standing smartphone (portrait mode), the indexMobilePortrait.html page is linked, and if the client is a lying smartphone (landscape mode), the indexMobileLandscape.html page is linked. . The JavaScript programs that operate on the indexDesktopLandscape.html, indexMobilePortrait.html, and indexMobileLandscape.html pages are the same or similar, but the UI (user interface) of the Internet page starts differently.

[Prior art literature]

[Patent Literature]

[Special 1] Mohan Ganesalingam, Christopher Sheldrick, Jack Waley-Cohen, "Method and apparatus for identifying and communicating locations", US Patent No. 9,883,333, Registration Date January 30, 2018.

[Special 2] Richard D. Haney, "Location sharing and tracking using mobile phones or other wireless devices", US Patent No. 7,353,034, Registration Date April 1, 2008.

[Special 3] Sami Sikila, "Positioning system and method", US Patent Publication No. 2003/0149527, published on August 7, 2003.

[Special 4] Seung June Oh and Minah Oh, "Location-based text messaging", US Patent No. 7,742,774, Registration Date June 22, 2010.

[Special 5] Marcel Mwa Van Os, Scott Herz, Mike Matas, "Location sharing", US Patent No. 8,369,867, Registration Date February 5, 2013.

[Special 6] Marcel Mwa Van Os, Scott Herz, Mike Matas, "Location sharing", US Patent No. 10,368,199, Registration Date July 30, 2019.

[Special 7] Marcel Mwa Van Os, Scott Herz, Mike Matas, "Location sharing", US Patent No. 10,841,739, Registration Date November 17, 2020.

[Special 8] Kim Han-seok, Kim Seong-soo, "Emergency call processing device and method using mobile communication network", Korean Registered Patent No. 10-0379946, registration date March 31, 2003.

[Special 9] Ralph M. Toms, "System and method of simulating with respect to spheroid reference models using local surface coordinates", US Patent No. 7,428,476, Registration Date September 23, 2008.

[Special 10] Ziji Wang, Jiefeng Sun, Dong Liu and Jiqing Zhang, "Method and device for sharing position", US Patent Publication No. 2020/0026418, published on Jan. 23, 2020.

[Special 11] Seth Jacob Pensack-Rinehart, Gavin Reaney, Yatin Chawathe, Nicholas Lee, Sascha Benjamin Brawer and Paul Messmer, "Providing indoor map data to a client computing device", US Patent Publication No. 2015/0019625, Publication Date 2015 January 15, 2011.

[Special 12] Zhou Bailiang and Jonah Jones, "Floor selection on an interactive digital map", US Patent No. 8,464,181, Registration Date June 11, 2013.

[Special 13] Zhou Bailiang and Jonah Jones, "Floor selection on an interactive digital map", US Patent No. 9,323,420, Registration Date April 26, 2016.

[Special 14] Kim Dong-hwan, Kwon Yeon-hee, Choi Jeong-ah, Kim Hyung-chan, "Indoor map database, map service providing device and method, indoor map providing device using open API, and indoor map production device and method", Republic of Korea Patent No. 10-1312294 , registration date September 23, 2013.

[Special 15] Kwon Gyeong-il, "Method for specifying geographical location and database using the same, and database of databases", Republic of Korea Patent Registration No. 10-2234723, Registration Date March 26, 2021.

[Special 16] Kwon Gyeong-il, "Method for specifying a location on the earth including indoors and database using the same", Republic of Korea Patent Registration No. 10-2308960, Registration Date September 29, 2021.

[Special 17] Kyungil Kwon, "Online Platform Based on Digital Map", Korean Registered Patent No. 10-2344087, Dongrok-il, Dec. 23, 2021.

[Non-Patent Literature]

[Non-Special 1] Wikipedia, "World Geodetic System".

[Special 2] Seonggon Lee, "Understanding of Geodetic Coordinate System and Map Projection for Practitioners of Physical Exploration", Geophysics and Geophysical Exploration, vol. 19, no. 4, 2016, p. 236 to 248.

[Non-spec 3] National Geospatial-intelligence Agency (NGA), "Web Mercator map projection", NGA_SIG_0011_1.0.0_WEBMERC (2014).

[Special 4] Wikipedia, "Mercator projection".

[Special 5] Wikipedia, "Web Mercator projection".

[Non-spec 6] Wikipedia, "Universal Transverse Mercator coordinate system".

[Non-Special 7] Wikipedia (https://en.wikipedia.org/wiki/), "Country branch number"

[Non-Special 8] Wikipedia, "Google maps".

[Non-spec 9] IETF (Internet Engineering Task Force), "The GeoJSON Specification: RFC 7946".

[Non-Special 10] Wikipedia, GeoJSON.

We want to provide a way to easily share indoor and outdoor places shown in the map app with others.

Indoor/outdoor places visible on the map app running as a web app can be sent as text messages and shared with the receiver. The text message body contains the geographic coordinates of the selected location and the map parameters, including the building ID and floor, as a search string. Contains the URL (Uniform Resource Locator) that contains

The sender and receiver can share the same map screen by integrating indoor and outdoor locations and sending them as text messages. .

1 is a conceptual diagram for understanding the difference between geodetic latitude and geocentric latitude.

Figure 2 is the result of moving to the southern tip of Marado on Naver Map.

Figure 3 is the result of moving to the southern tip of Marado on Google Maps.

FIG. 4 is a result of searching for the string shown in the address bar of the Google Map of FIG. 3 in Google's Chrome browser.

5 is a conceptual diagram of a Mercator projection;

6 is an example of a map created by the Mercator projection.

7 is a conceptual diagram for understanding spherical Mercator projection;

8 is an example of a world map drawn in the UTM coordinate system.

9 is a conceptual diagram of a UTM zone;

10 is an example of a national branch number guide board.

11 is a part of an introductory screen of what3words app.

12 and 13 are examples of what3words app execution.

14 is a start page screen introducing indoor maps of Google.

15 and 16 are enlarged indoor maps of the 6K floor and the second basement floor in Google's indoor map of Madison Square Garden.

17 is a conceptual diagram of a coordinate system used in the prior art.

18 is a conceptual diagram illustrating the concept of layer information in the conventional invention.

19 is a conceptual diagram showing the configuration of a digital map system according to the related art;

20 is a diagram showing a view of a digital map and an example of a building in the center in the prior art.

21 is a diagram illustrating the configuration of layers in an embodiment of the prior art.

22 is a flow chart showing an algorithm of a map app in the prior art.

23 is a flowchart of a plan view display subroutine in an embodiment of the prior art;

24 is a conceptual diagram illustrating a process of changing a landing page of a map app using a media query.

25 is an example in which the entrance of Jangdong Forest Park in Mt. Gyejok is at the center of the map screen of the digital map.

26 is an enlarged view of the control window shown in FIG. 25;

27 is JavaScript code of the map object of the present invention.

28 is a JavaScript code for defining a basic map parameter and a start map parameter in the first embodiment of the present invention.

29 is a flowchart illustrating an algorithm for displaying an initial screen by executing a map app;

30 is an example of JavaScript code specifying target map parameters.

31 is a diagram showing an initial screen of a map app in the first embodiment of the present invention.

32 is a flowchart of an algorithm for storing starting map parameters.

33 is a diagram for explaining a menu of a map app;

34 is an initial screen when the map app is executed again after saving the starting map parameters to local storage.

35 is a flow chart illustrating an algorithm of the step of sending a text message by the sender in the second embodiment of the present invention.

36 is an example of an event listener connected to a 'send screen as text message' button;

37 to 39 are examples of sending a map screen by text message from a smartphone.

40 is a flow chart showing an algorithm for selecting a received text message and executing a map app.

41 is an example of JavaScript code for extracting map parameters from a URL.

42 is a flowchart showing an algorithm for differentiating a landing page according to a type of device and a screen mode in the third embodiment of the present invention.

43 is a flow chart showing an algorithm for displaying an initial screen of a digital map on a landing page.

44 is an example of an indoor map displayed on the screen of the map app in the fifth embodiment of the present invention.

45 is a flowchart showing an algorithm for displaying an initial screen of a map app in a fifth embodiment of the present invention.

46 is a conceptual diagram illustrating a search range in an embodiment in which an indoor map is displayed on an initial screen;

47 is an example of registering an indoor location as a starting place and displaying it on the initial screen in the fifth embodiment of the present invention.

48 to 50 show cases in which the algorithm of the fifth embodiment fails.

51 is a conceptual diagram for explaining why the algorithm of the fifth embodiment fails.

52 is a flow chart showing an algorithm for storing starting map parameters in the sixth embodiment of the present invention;

53 is a flowchart showing an algorithm of a step of displaying an initial screen so that a place displayed on the initial screen matches a target map parameter;

54 is a flow chart showing an algorithm for sending text messages to indoor/outdoor places in the seventh embodiment of the present invention.

55 is an example of JavaScript code for extracting map parameters from a search string included in a URL and storing them in session storage;

56 is an example of JavaScript code that creates a map parameter object from map parameters.

57 shows a map app installed on a smartphone as a PWA.

58 is an example of a menu button of a map app of the present invention.

59 is a smartphone screen executing a menu for sending GPS coordinates as a text message.

60 to 61 are parts of JavaScript code that implements an algorithm for sending GPS coordinates as text messages.

62 and 63 are smartphone screens that send GPS coordinates as text messages.

64 is a flowchart showing an algorithm for sending GPS coordinates as a text message in the eighth embodiment of the present invention.

65 is a conceptual diagram illustrating a typical case where the device receiving the text message is a text message server.

66 is a flowchart showing an algorithm of the step of registering emergency contact information in the ninth embodiment of the present invention.

67 to 68 are examples of smartphone screens for registering emergency contact information.

69 is an example of JavaScript code for creating an urgent text message in the ninth embodiment of the present invention.

70 is an example of an urgent text message sent in the ninth embodiment of the present invention.

71 is a flow chart showing an algorithm of the step of automatically sending a text message in the tenth embodiment of the present invention.

[Example 7]

Using the technology used in the inventions of the first to sixth embodiments, an outdoor map or an indoor map can be sent as a text message and shared with a recipient. That is, the seventh embodiment of the present invention relates to a method for sharing an indoor/outdoor place visible on a map app with a receiver by sending a text message, It consists of a sender sending a text message and a recipient selecting a received text message and executing a map app.

54 is a flow chart showing the algorithm of the sender sending a text message, and the sender selecting a place to be displayed on the initial screen of the map app running as a web app on the recipient's device through interaction with the map app. , The sender executes a menu to send the selected place as a text message, and the map app includes a URL (Uniform Resource Locator) including map parameters corresponding to the selected place as a search string. and creating a text message body for sending the text message, selecting a recipient by the sender and sending the text message.

The step in which the recipient selects the received text message to launch the map app, the step in which the recipient selects the received text message to launch the map app that runs as a web app, and the map app launches the map from the search string included in the URL A step of extracting parameters (parse), and a step of displaying the initial screen so that places visible on the initial screen of the map app match the extracted map parameters.

Map parameters corresponding to the selected place include geographic coordinates, building ID and floor, as well as zoom and rotation of the map area. It is desirable to do

The building ID is given as a natural number of 1 or more when a building at view center exists, and is given as a number other than a natural number when the building at view center does not exist. For example, it can be given as -1.

The floor is given as 0 when the central building does not exist, and given as an integer when there is a central building and an indoor map is displayed, and the central building exists but indoors If the map is not displayed, it is given as a non-integer number. For example, it can be given as Infinity.

55 is a JavaScript code for extracting (parsing) a map parameter from a search string (window.location.search) included in a URL and storing it in session storage, and is a part of an index page (index.html). After replacing all colons (":") with ampersands ("&") in the search string, create a URLSearchParams object named searchParams from this search string. If this object is not an empty object (""), a new session storage (window.sessionStorage) is created. Next, read northing, easting, latitude, longitude, zoom, rotation, building ID, and floor from searchParams. Access and read are stored in variables called northing, easting, latitude, longitude, zoom, rotation, bldID, and floor, respectively. If there is a value corresponding to searchParams, the actual value is stored in the variable, and if there is no corresponding value, the variable becomes an empty variable with no value (null).

Finally, a mapParameters object named sessionMapParameters is created from these eight variables and stored in the session storage. To store sessionMapParameters in session storage, you must first convert them into strings. After that, the corresponding landing page is started by determining the device type and screen mode.

56 is the JavaScript code for creating a map parameter object. The northbound distance, eastbound distance, latitude, longitude, zoom, rotation, building ID, and floor passed as map parameters are stored in internal variables named __northing, __easting, __latitude, __longitude, __zoom, __rotation, __bldID, and __floor, respectively. . If both northbound and eastbound distances have valid values (line 4), the latitude and longitude are calculated from the northbound and eastbound distances (lines 6 and 8) and stored as a location object (line 10). If either of the northbound and eastbound distances do not have valid values, check whether latitude and longitude both have valid values. If both latitude and longitude have valid values, save them as a location object (line 11). If neither latitude nor longitude has a valid value, the location object is set to null (line 12). If the location object is not null (line 14), zoom, rotation, building ID, and floor are investigated, and if there is a value, the value is saved. If there is no value, the default value is used (lines 16 to 26).

The step of displaying the initial screen so that the place visible on the initial screen of the map app matches the extracted map parameters is the step of storing the extracted map parameters in session storage, using a media query Determining the device type and screen orientation, launching a landing page suitable for the device type and screen orientation, and storing the landing page in the session storage It includes getting map parameters, designating the map parameters retrieved from the session storage as target map parameters, and setting a map object to match the target map parameters.

In this way, if the search string included in the URL includes distance north and east, or latitude and longitude, the map app is started with the geographical coordinates. If both northbound and eastbound distances and latitude and longitude are included, use the northbound and eastbound distance values. If the URL does not contain geographic coordinates, the Maps app is launched with the starting map parameters stored in local storage. If the starting map parameters are not also saved, the map app will be launched with the default map parameters.

If the building ID and floor are valid values, it informs the exact location on the indoor map. If not, it is regarded as outdoor and only the outdoor map is displayed on the initial screen of the digital map. If zoom and rotation are included, the map screen sent by the sender is reproduced on the recipient's device as it is, otherwise only the location is indicated.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 25 to 71 .

[Example 1]

Suppose the future hope is that a boy who is a great climber like Sir Edmund Hillary decides to become the youngest ever climber to climb Mount Everest. 25 is an example in which the entrance of Gyejok Mountain Jangdong Forest Park located in Daedeok-gu, Daejeon is located at the center of the view (map screen) of the digital map. Assuming that this Mt. Gyejok is Mt. Everest, the boy would look at the map of Mt. Everest from time to time in this way, study it, and make a plan to climb it.

The digital map of the embodiment of the present invention shown in FIG. 25 is executed as a web app, more preferably as a Progressive Web App (PWA). A web app has a control pane and a view, and can have an address bar (URL bar, address bar, location bar). Even a web app can use a WebView that hides the address bar, so the address bar is not always exposed in a web app.

A view is a map screen on which a map is displayed and has a rectangular shape. In the present invention, a view and a map screen, or more simply, a screen are used in the same sense. In addition, the outdoor map displayed on the map screen will be referred to as a map area.

The control window displays (geodetic) latitude, longitude, distance north, distance east, zoom, rotation, etc., and has various control menus to interact with the digital map. FIG. 26 is an enlarged view of a part of the control window of FIG. 25 . Since a vertical slider is attached to the control window, moving the vertical slider scrolls the control window in a vertical direction, so that different menus can be displayed.

When the outdoor map shown on the map screen, that is, the map area, is changed, the values such as latitude and longitude, northward distance, eastward distance, zoom, rotation, etc. displayed on the control window are recalculated and displayed in real time. do. The latitude and longitude shown in the control window, or the northward and eastward distances that can be converted to and from them, are precisely the geographic coordinates of the point corresponding to the view center. In the map app of the embodiment of the present invention, a center marker is attached to the view so that users can know exactly where the center of the view is. For example, even if the map area visible in the view changes due to panning, the center marker is always fixed at the center of the view.

The most desirable northward and eastward distances are given as Equations 18 to 19.

where φ is the geodetic latitude, λ is the longitude, and R is the Earth's mean radius, for which 6,378,137 m can be used. Also, N is northing and E is easting.

The range of the outdoor map visible in the view is referred to as a view extent. The view range can be specified as the minimum and maximum values of the latitude and longitude of the map area. However, it is more common to specify by zoom in addition to a pair of latitude and longitude of the center of the map area, or a pair of distance north and east. That is, the view range may be displayed with the geographical coordinates and zoom of the center of the map area, or with the minimum and maximum values of the geographical coordinates. Also, the resolution of the map may be specified instead of the zoom of the digital map. The resolution of a map means how many geographical coordinate intervals one pixel on the map screen corresponds to.

Unlike a map printed on paper, a digital map can be rotated using two fingers on a smartphone (pinch rotate), and a map can be rotated using a dial shown in the lower right corner of FIG. 25 . Therefore, the outdoor map shown in the view is completely determined by specifying all three values of the geographic coordinates of the center of the view, zoom, and rotation.

A pair of latitude and longitude, or a pair of interconvertible north and east distances, indicates a horizontal location on the Earth. Latitude and longitude, or latitude and longitude plus altitude, are called geographic coordinates. In the present invention, geographical coordinates indicating a location in a horizontal direction will be referred to as a location. To specify a map area, you must specify the geographic coordinates of the center of the map area, that is, the location, zoom, and rotation. A location is given as a pair of longitude and geodetic latitude, i.e. [longitude, latitude], or a pair of easting and northing distances, i.e. [distance easting, that is interchangeable with a pair of longitude and latitude. , northbound distance]. Square brackets ([]) represent an array in JavaScript. We will collectively refer to these as map parameters.

Map parameters corresponding to an outdoor map visible in the view, that is, a map area, will be referred to as view map parameters. The view map parameters include the view location viewLocation, the view zoom viewZoom, and the view rotation viewRotation, where the view location is an array of longitude and latitude of the view center ([longitude, latitude]) , or as an array of Easting Distance and Northwarding Distance ([Easting Distance, Northward Distance]).

A map service provider must decide which region to display at the beginning when a user starts a digital map. The most common way is to show a map of your current location. When you start Google Maps or Naver Maps on your smartphone, the location is determined from the GPS signal and a map of the current location is displayed.

In the case of a boy climber, a screen like FIG. 25 may be displayed whenever a digital map is started. However, unless it is a digital map used only by one person, as shown in FIG. 21, the starting position of the map cannot be designated in the digital map program itself.

In fact, personalization of the starting location of a digital map is in universal demand. If a company inserts a map on its homepage to guide its location, the homepage will always want to show the location of the company. Or, a hiker going to a new mountain every weekend would want to change the map area displayed on the map's start screen on a weekly basis.

One method that can be used in this case is to use local storage. Local storage can be referred to as a memory space that can be used semi-permanently by an internet browser. That is, data stored in the local storage exists in a device supporting an Internet browser until the corresponding data is intentionally deleted. A typical example of a device could be a PC or a smartphone.

As described above, in order to reproduce the digital map shown in FIG. 25 as it is, the geographical coordinates, zoom, and rotation must all be the same. As shown in FIG. 25, in order for the entrance of Jangdong Forest Park to come to the center of the map area, latitude and longitude should be given as 36.40658543° and 127.43884349°, respectively. In addition, a zoom level of 13.5 is appropriate for viewing the entire Mt. Gyejok at a glance. And to show the road leading to Jangdong Forest Park in front, the map must be rotated 270°.

27 shows the JavaScript code of the map object of the present invention. Instead of specifying the view center and zoom directly, they are specified indirectly using the parameters goal location goalLocation and goal zoom goalZoom. The goal location is given as an array of goal longitude goalLon and goal latitude goalLat, namely [goalLon, goalLat]. Also, if the map needs to be rotated, that value is stored in the goal rotation goalRotation. Goal Rotation The goalRotation is set in degrees, but since OpenLayers uses the unit of radians, convert it to radians and rotate the map accordingly.

The map screen displayed when the map app starts can be called the initial screen. The initial screen refers to a map screen before changing geographic coordinates, zoom, rotation, etc. of the center of a view through user interaction. The initial screen of the digital map is determined through the setting of a map object.

28 shows JavaScript code defining default map parameters and start map parameters in the first embodiment of the present invention. [ λ, φ]. The default map parameters consist of default latitude default_latitude, default longitude default_longitude, default zoom default_zoom, and default rotation default_rotation. Have. 28, the basic position is the position of the statue of King Sejong the Great in Gwanghwamun, the basic zoom is 17.0, and the basic rotation is 0°.

On the other hand, the start map parameters include start latitude start_latitude, start longitude start_longitude, start zoom start_zoom, and start rotation start_rotation, and have an initial value ( initial values) are all set to 'null'.

At the start of the map app, these default map parameters are assigned as target map parameters. Therefore, when the code of FIG. 27 is executed, the initial screen is displayed to match the basic map parameters. Meanwhile, in order to personalize a map start screen, that is, a map area displayed on the initial screen, view map parameters may be stored as start map parameters. The start map parameters include start location start_location, start zoom start_zoom, and start rotation start_rotation.

When the user presses the menu button 'store current screen as start screen' in the Maps app, the view map parameters are saved to local storage as the starting map parameters. do. Here, 'view map parameters' do not refer to the map parameters of a physical place where a device such as a smartphone or computer is located, but rather the setting of the map displayed in the view of the map app. . For example, when viewing the map of Mount Everest at '21 Mokcheok 1-gil' in Daejeon City and clicking the 'Save current screen as start screen' button, the map parameters of Mount Everest are saved to the local storage as 'start map parameters'.

The next time you start the Maps app, the Maps app checks to see if valid 'start map parameters' are stored in local storage, and if so, assigns them as 'goal map parameters'. You can make Mount Everest visible on the start screen of your digital map. On the other hand, if you want to show 'Mokcheok 1-gil 21' the next time you start the digital map, you can move the map area to 'Mokcheok 1-gil 21' in the map app and press the 'Save current screen as start screen' button. However, you can specify it more conveniently by pressing the 'find current location using GPS' button first to show the user's location on the map, and then pressing the 'save current screen as start screen' button.

To store a value in local storage, a key-value pair must be used in the form of a JavaScript object, and the key must be given as a string. Therefore, if you want to give a value of 36.0 to a key called start_latitude and store it in local storage, you can execute the JavaScript command window.localStorage.setItem("start_latitude", 36.0). And to get this value, run the command window.localStorage.getItem("start_latitude"). However, the value obtained in this way is given as a string, not a real number. Therefore, a process of converting it to a real number is required. Taking all of this into account, you can run a command like this:

let start_latitude = parseFloat(window.localStorage.getItem("start_latitude"));

When this command is executed, the value of 36.0 is stored in a variable called start_latitude. If you want to retrieve values given as integers, such as building identification numbers or floor numbers, you can execute the parseInt() command instead of the parseFloat() command.

29 is a flow chart showing an algorithm of steps for executing a digital map after saving starting map parameters. When the user launches a digital map, the map app checks to see if the starting map parameters are stored in local storage. If there is a saved starting map parameter, the starting map parameter is retrieved and set as the target map parameter. If there is no saved starting map parameter, the default map parameter is specified as the target map parameter. Finally, the initial screen is displayed so that the map area of the initial screen matches the target map parameters.

30 shows JavaScript code that specifies goal map parameters. If the values stored in the keys start_latitude and start_longitude are both valid (not null), those values are designated as goalLat and goalLon, respectively, and the values stored in the keys start_zoom and start_rotation are also designated as goalZoom and goalRotation, respectively. If either value is invalid (null), the base map parameter is set as the target map parameter. After all, if valid starting map parameters are stored in local storage, the Maps app will start with starting map parameters, otherwise it will start with default map parameters.

31 is a diagram showing an initial screen of a digital map in the first embodiment of the present invention. Currently, there are no stored starting map parameters, so the initial screen shows Gwanghwamun Square that matches the default map parameters.

32 is a flow chart showing an algorithm for storing start map parameters. The step of storing the starting map parameters begins with a step in which the user selects a map area to be displayed on the initial screen of the map app through interaction with the map app.

33 shows a main screen of a map app executed as a web app. There is a control pane on the left side of the screen, and a view (map screen) on the right side. The map area visible in the view is specified by view map parameters. At the top left of the view is a plus (+) button to increase zoom and a minus (-) button to decrease zoom. At the bottom right is a dial that lets you rotate the map. In addition, you can change the map area by placing the mouse cursor on the map shown in the view, pressing the left mouse button and dragging, and you can change the zoom by turning the mouse wheel. In this way, you can change the map area visible in the view. In FIG. 33 , the view map parameters are latitude 36.40658543°, longitude 127.43884349°, zoom 17.0, and rotation 277.0°.

When the user completes the step of selecting a map area to be displayed on the initial screen of the map app through interaction with the map app, a menu for saving the selected map area as a start map area is executed. The control window of FIG. 33 includes a menu button for storing start map parameters (button for storing start map parameters) and a menu button for erasing start map parameters (button for erasing start map parameters). The name of the menu button to save the start map parameters is 'Save current screen as start screen', and the name of the menu button to delete start map parameters is marked 'Clear start screen'.

When the menu button for saving the starting map parameters is pressed, the map parameters corresponding to the selected map area, that is, the view map parameters are saved as the starting map parameters in the local storage. 34 shows the initial screen of restarting the map app after saving the starting map parameters. It can be seen that the map area visible in the view is the same as the map area of FIG. 33 .

However, instead of saving the starting map parameters to local storage, it is also possible to store them on the app server. In this case, of course, a device such as a PC or a smartphone must be connected to the Internet, and secondly, a user login must be performed. In this case, you can choose whether to store the starting map parameters in local storage or in the app server, or you can save them in the local storage first and additionally in the app server. However, the most desirable method is to first save it to local storage, then check if the user is logged in to the app server, and if so, save the start map parameters to the app server as well.

In this case, in the step of running the map app, first check if you are logged in to the app server, and if so, check if the starting map parameters are stored in the app server. If the starting map parameter is stored in the app server, the starting map parameter is designated as the target map parameter. If the starting map parameters are not stored in the app server, check if the starting map parameters are stored in the local storage. If valid values are stored in the local storage, the starting map parameter is designated as the target map parameter. If the value is not stored in both the app server and local storage, set the base map parameter as the target map parameter.

Even if the value stored in the local storage is erased in this way, it can be restored using the value stored in the app server. In addition, if you have saved the starting map parameters on your PC, you can run the map app with the changed starting map parameters on your smartphone.

According to the first embodiment of the present invention, a user who uses the map service of the present invention with a PC or smart phone can personalize the map area displayed on the initial screen of the digital map for each device.

[Example 2]

Let's assume that a boy climber meets with a friend at the entrance of Jangdong Forest Park on the weekend to practice climbing Mt. Gyejok. If so, the address of the rendezvous may be called by phone or sent by text message, but it would be more desirable if the digital map shown in FIG. 25 is directly sent. The second embodiment of the present invention sends the URL (Uniform Resource Locator) of the digital map as a text message, and when the receiver selects the received text message, the digital map starts as a web app and is sent to the initial screen of the map app. It is an invention related to a method for making a map area sent by a sender visible. The act of selecting a text message includes both clicking with a mouse and tapping on a touch monitor.

If the invention of Example 1 is a method for personalizing the map area shown on the initial screen of a map app running as a web app on a user's device, the invention of Example 2 is executed as a web app on a recipient's device that receives a text message. This is a one-time personalization of the map area shown on the initial screen of the map app. Specifically, the second embodiment of the present invention is to share a map area shown on a map screen (view) of a digital map executed as a web app with a recipient. An invention relating to a method of sending a text message. This embodiment consists of sending a text message by the sender and executing a map app by selecting the received text message by the recipient.

35 is a flowchart showing an algorithm of a sender sending a text message. This step starts with the sender selecting a map area to be displayed on the initial screen of the map app running as a web app on the recipient's device through interaction with the map app. The first embodiment of the present invention It is the same as the step of selecting a map area in .

When a map area is selected, the sender executes a menu to send the selected map area as a text message. The Maps app provides a uniform resource URL (URL) that includes geographic coordinates corresponding to the selected map area and map parameters including zoom and rotation as a search string. The text message body including the Locator is written in the text message window. When the creation of the text message is completed, the sender selects a recipient and sends the text message.

36 shows an example of an event listener connected to a menu button (btnSendScreenBySMS) called 'send screen by text message', and its structure is as follows.

btnSendScreenBySMS.addEventListener("click", function(){

....

}, false);

That is, when the menu button is clicked, an anonymous function is executed. The JavaScript code inside this anonymous function is the source code for the map app to send SMS (Short Message Service) map parameters corresponding to the selected map area. Such a function can be implemented in various ways, and the code presented in FIG. 36 is just one example.

In line 4, a URLSearchParams object instance with no content is created with the name searchParams. Next, in line 7, the viewNorthing of the view center is appended to searchParams with a key of northing. Similarly, viewEasting, zoom, and viewRotation of the center of the view are added to searchParams with keys called easting, zoom, and rotation, respectively. Although latitude and longitude may be used instead of distances north and east, distances north and east were used to indicate distance units.

The prepared searchParams are JavaScript objects. Convert this JavaScript object to a string using the toString() method. For the map area shown in FIG. 33, the converted character string is given as follows.

northing=14071516.723&easting=27544298.950&zoom=17.0&rotation=277.0

The ampersand (&) included here means 'and'. However, a problem may occur in the process of adding the URL including this ampersand to the text message body. Specifically, the program may be confused about where the body of the text message is. To avoid this problem, use the replace(/&/g, ':') method to change all ampersands (&) to colons (:). The reason why the colon was chosen among the many symbols is purely because the finished string looks good and is easy to read. Therefore, the command searchParams.toString().replace(/&/g, ':') returns the following string.

northing=14071516.723:easting=27544298.950:zoom=17.0:rotation=277.0

Here, if you get the address of the web app (https://map.digitalearth.land) with the command window.location.origin and add a question mark (?) to display the search string, the completed string stringTextarea is is given as

stringTextarea = "https://map.digitalearth.land?northing=14071516.723:easting=27544298.950:zoom=17.0:rotation=277.0"

Next, in line 21, an anchor element named linkSMS is created in the document, and in line 23, it is attached to the document as a child element (appendChild). In line 25, "sms:?body=" + stringTextarea is specified as the href attribute of linkSMS. sms means that this anchor element linkSMS is an element for sending a text message, and "body=" + stringTextarea means to write stringTextarea in the message body of this text message. And the recipient to receive the text message is not specified, but if you do this, a dialog box prompting you to select a recipient appears on the smartphone.

The most common anchor element in Internet documents is an HTML link to another web page. When this link is clicked or touched with a mouse, a web page connected to the link is redirected. In this way, click() is a command that can replace mouse clicks or touches with programs. Line 27 programmatically clicks the anchor (linkSMS) created in this way to send a text message.

37 to 39 are examples of sending map screens through text messages from a smartphone. 37 is a screen for executing the 'send screen by text message' menu on the inventor's smartphone, and FIG. 38 is a screen for sending a text message to the inventor's own smartphone, and FIG. 39 is a reception screen. This is the screen where you started the map app by clicking on the text message.

40 is a flowchart illustrating an algorithm of a step of executing a map app by selecting a received text message by a recipient. In this step, the recipient selects the received text message to start the map app (launch), the map app extracts map parameters from the search string included in the URL (parse), and the map app appears on the initial screen of the app. and displaying an initial screen so that the map area conforms to the extracted map parameters.

Since the most common device is a smartphone, when the recipient selects a text message received on the smartphone, the URL included in the text message (https://map.digitalearth.land?northing=14071516.723:easting=27544298.950:zoom= The map app (https://map.digitalearth.land) included in 17.0:rotation=277.0) starts as a web app. If the web page to start in the web app is not explicitly specified, the browser will find the index.html page or the index.php page and execute it. 41 is JavaScript code included in the index.html page.

When the URL is given as "https://map.digitalearth.land?northing=14071516.723:easting=27544298.950:zoom=17.0:rotation=277.0", window.location.search is given a string of question marks or less.

window.location.search = "?northing=14071516.723:easting=27544298.950:zoom=17.0:rotation=277.0"

Here, the method of extracting map parameters can be implemented in various ways, but the simplest method is to use URLSearchParams once again. To this end, the colon (:) used in place of the ampersand (&) in the text message transmission process must be replaced with an ampersand again. If you execute the command window.location.search.replace(/:/g, '&'), all colons are replaced with ampersands as follows.

window.location.search.replace(/:/g, '&') = "?northing=14071516.723&easting=27544298.950&zoom=17.0&rotation=277.0"

A URLSearchParams object with the name of searchParams is created from the string replaced in this way. After reading the value corresponding to the key using the get() method in searchParams, you can get the map parameter by converting it by mistake. For example, the northbound distance can be obtained as follows, and the eastbound distance and zoom and rotation can all be obtained in the same way.

let northing = parseFloat(searchParams.get("northing"));

[Example 3]

If the device that sends the map screen as a text message and the device that receives the text message are of the same type and have the same screen mode, a code like this is sufficient. However, the devices may not be the same, such as sending from a PC to a smartphone or from a smartphone to a PC. In addition, on smartphones, the screen can be used in landscape mode or portrait mode. In this case, it is convenient to use a web page with a different layout. For example, if the device is a PC, the landing page could be named indexDesktopLandscape.html. In addition, if the device is a smartphone and the screen mode is portrait mode, the name of the landing page can be indexMobilePortrait.html, and if the screen mode is landscape mode, the name of the landing page can be indexMobileLandscape.html. Therefore, as illustrated in FIG. 24, after determining the type of device and screen mode on the index page (index.html), it is necessary to redirect to an appropriate landing page.

However, in an HTML document, variables are not shared between different web pages. For example, if you select a text message received from your smartphone and run the map app in portrait mode, the indexMobilePortrait.html page should be executed, but the map parameters extracted from the index.html page cannot be viewed in the indexMobilePortrait.html page. none. A method for solving such a problem is to use a session storage. Local storage and session storage are defined in Internet standards and can be used by all Internet browsers.

Local storage is a storage method that stores variables as key-value pairs in the device's hardware and can be used continuously until intentionally deleted. On the other hand, session storage is a storage method that can be used temporarily only while the Internet browser is running, and is used to transfer variables between web pages. Variables stored in the session storage disappear as soon as the Internet browser is closed. However, storing variables in local storage and storing variables in session storage are virtually the same. For example, how to store the value of a variable called northing in a key called 'northing' in local storage and session storage is as follows.

window.localStorage.setItem('northing', northing);

window.sessionStorage.setItem('northing', northing);

In addition, the method of bringing the stored value is as follows.

let northing = parseFloat(window.localStorage.get('northing'));

let northing = parseFloat(window.sessionStorage.get('northing'));

An algorithm corresponding to the type of device and screen mode using such session storage is shown in FIG. 42 . When the recipient selects the received text message, the Maps app is launched with the URL included in the text message. The JavaScript code contained in the index page (index.html) retrieves the search string from the location object contained in the URL. The search string can be obtained with window.location.search. After extracting (parsing) the map parameters from the search string again, the extracted parameters are stored as session variables in the session storage.

Next, it determines whether the type of device on which the map app is running is a smartphone or a PC, and if it is a PC, it starts with indexDesktopLandscape.html, a landing page designed for PC. If the device type is a smartphone, you can start with indexMobilePortrait.html for portrait mode and indexMobileLandscape.html for landscape mode.

After starting the landing page corresponding to the device type and screen mode, map parameters are fetched from the session storage, and the index page (index.html) is closed. Finally, the initial screen is displayed so that the map area visible on the initial screen matches the map parameters.

The fact that a map app running as a web app would be preferable if it were a PWA, that instead of sending geographic coordinates as longitude and geodetic latitude pairs, it would send longitude and geodetic latitude pairs and interconvertible distance east and north distance pairs. The fact that it is more preferable is not only the same as in the first embodiment, but also the same in all the following embodiments.

[Example 4]

Embodiment 1 of the present invention relates to a method for personalizing the initial screen of a map app, and embodiments 2 and 3 are methods for one-time personalizing the initial screen of a map app executed on a device of a recipient who receives a text message. It is an invention about Then, when the recipient has personalized the initial screen of the map app, there is a problem of what to do with the map area displayed on the initial screen of the map app when a text message is received and selected as in Embodiments 2 and 3.

43 is a flowchart showing an algorithm for displaying an initial screen of a digital map on a landing page. When a landing page such as indexDesktopLandscape.html, indexMobilePortrait.html, or indexMobileLandscape.html is determined, the map app first checks whether valid map parameters are stored in the session storage. If valid map parameters are stored, get the map parameters from session storage and set them as target map parameters. If valid map parameters are not stored in session storage, this time we check if valid starting map parameters are stored in local storage. If a valid starting map parameter is stored, the starting map parameter is retrieved from local storage and assigned as the target map parameter. If there are no starting map parameters stored in local storage, the base map parameters are set as target map parameters. Finally, the initial screen is displayed so that the map area visible on the initial screen of the digital map matches the target map parameters.

As a result, when you click on the text message, the map matching the search string contained in the URL of the text message is displayed, and when you start the Maps app in the usual way, it starts with the personalized home screen, if there is one, and the personalized home screen is displayed. If not, it starts with the default map screen. Therefore, the invention of Embodiment 1 and the invention of Embodiments 2 to 3 can be implemented at the same time.

[Example 5]

According to the prior art disclosed in [Special 15] to [Special 17], an indoor map is displayed at the correct location on the outdoor map. For example, if an indoor map of a department store or shopping mall is registered, a business name is displayed at the location of each store on the indoor map, and when the business name is selected, the homepage or online shopping mall may be connected.

If a merchant who runs a store in a shopping mall has linked an online shopping mall to his/her business name, every time the digital map is started, he/she will want to check the online shopping mall for new orders or customer reviews. Therefore, in this case, there is a need to personalize the starting location of the digital map, including indoors.

In the present invention, a location on an outdoor map and a location on an indoor map are collectively referred to as a place. A place is a concept that includes geographic coordinates given as a pair of longitude and geodetic latitude, or a pair of longitude and geodetic latitude, and a pair of interconvertible distances east and north, and a floor within a building. . The zoom and rotation of the digital map are not included in the concept of place. That is, the fifth embodiment of the present invention is an invention for personalizing indoor/outdoor places shown on the initial screen of a map app.

44 shows an indoor map of the second floor of the OK Venture Town building where the applicant's office is located. In order for this place to be visible on the initial screen of the map app, a floor must be added to the map parameters in addition to the distance north and east, and zoom and rotation must be added to reproduce the map screen of FIG. 44 as it is. If the map parameters that specify a place contain only geographic coordinates and layers, then saving the map parameters to local storage as starting map parameters adds zoom and rotation, and those values are included in the base map parameters. Use values for zoom and rotation (e.g. zoom = 17 & rotation = 0).

45 is a flowchart showing an algorithm for displaying an initial screen of a digital map having a starting map parameter including layers. As in the first embodiment of the present invention, when the user starts the digital map, the map app checks whether there are starting map parameters stored in the local storage. If there is a saved starting map parameter, the starting map parameter is retrieved and set as the target map parameter. If there is no saved starting map parameter, the default map parameter is specified as the target map parameter. Finally, the initial screen is displayed so that the place visible on the initial screen matches the target map parameters.

46 is a conceptual diagram for explaining a search area necessary for personalizing a place visible on the initial screen of a digital map including indoors, that is, a start place. 46 shows the outlines of four buildings. These buildings are buildings whose building center is included in the view extent. In FIG. 46, representative points of each building are indicated by points. It is desirable to set the representative point of each building as the centroid of the geometry representing the outline of the building, but if the shape of the geometry is unique, a point within the building may be arbitrarily selected apart from the centroid.

The step of displaying the initial screen so that the place visible on the initial screen of the map app meets the target map parameters includes the following steps. First, the view range is determined from the target map parameters and the outdoor map is displayed. Then, a search area including a view extent is determined. The search range is the range of geographic coordinates to search for buildings in the building database. The search range can be made the same as the view range, but it is preferable to make it larger than the view range. For example, the search range can be centered with the view range, have the same shape, and have twice the area.

When the search range is determined, the building database is searched and a list (Bld_ID) of buildings whose representative points are included in the search range is created. For the buildings included in this list, a list of buildings to display outlines (bldIDsToShow) is created by comparing the zoom level (zoomShowBld) of each building and the zoom level (viewZoom) of the digital map, and Building outline drawings are retrieved from the building data store and marked in the correct location on the outdoor map.

Next, for the buildings in the outline display target building list (bldIDsToShow), the floor plan display zoom level (zoomShowFloor) and the digital map zoom level (viewZoom) are compared to create the floor plan display target building list (floorplanIDsToShow). For the buildings in the list of buildings to be displayed as floor plans, check if they are buildings with a ground floor, and the floor plans of the buildings with ground floors are retrieved from the building data storage and displayed in the correct location on the outdoor map.

Next, it checks whether there is a building whose view center is located within the outline of the building, that is, a building at the view center. If there is a building in the center, check if the floor (goalFloor) of the building included in the target map parameter is the ground floor. Mark the correct location on the map.

47 is an example in which the indoor map of the second floor of OK Venture Town is displayed on the initial screen of the digital map by applying the algorithm, and it can be seen that the same map screen as in FIG. 44 is displayed as the initial screen. In this way, in order to show the indoor map on the initial screen, several steps must be operated sequentially. For example, the list of buildings to be displayed in a floor plan (floorplanIDsToShow) should not be created before the list of buildings to be displayed with outlines (bldIDsToShow) is completed. Retrieving the building database or fetching the outline drawing or floor plan of the building from the building data store and displaying it in the correct location on the outdoor map is done asynchronously. Nevertheless, a program must be written so that the steps described above operate synchronously in nature, i.e., the next step begins only after the previous step has finished.

[Example 6]

In the center of FIG. 48, the outline of the Daejeon Jungang-ro Underground Shopping Center is displayed at the correct location on the outdoor map, and on the right side, the outline of the Daejeon Station Underground Shopping Mall is partially visible. 49 shows a state in which the right corridor of the Daejeon Jungang-ro Underground Shopping Center is designated as the starting point of the digital map, and FIG. 50 shows the initial screen of the digital map. In FIG. 50, the outdoor map is reproduced with the same geographical coordinates, zoom, and rotation, but it can be seen that the indoor map is not displayed.

51 is a conceptual diagram for explaining why the algorithm of Example 5 fails in this case. Daejeon Jungang-ro Underground Shopping Center is a relatively large underground shopping center with about 490 stores. However, when the centroid of the figure representing the outline of this underground shopping center is obtained, it is not located within the outline of this underground shopping mall. Therefore, the representative point of this underground shopping mall was arbitrarily matched with the center of the intersection of Jungang-ro, Daejeon.

In FIG. 51, the view extent of the digital map is biased towards the right corridor of the underground shopping mall. However, due to the size and shape of the underground shopping mall, the building center of the underground shopping mall is not included in the search area as well as the view extent. Therefore, even if the search range is determined in the target map parameter and then the building database is searched, this Daejeon Jungang-ro Underground Shopping Center cannot be searched. Therefore, only the outdoor map is displayed in FIG. 50, and the indoor map is not displayed.

The most preferred way to solve this problem is to include a unique building identification number, that is, a building ID (bldID) of a building in the map parameter in addition to the floor. That is, the map parameters include geographical coordinates, building IDs, and floors, and may further include zoom and rotation of the digital map. In addition, the concept of place shall include geographical coordinates, building ID, and floor.

The sixth embodiment of the present invention is a method for personalizing an indoor/outdoor place shown on the initial screen of a digital map executed as a web app for each device. The related invention consists of storing start map parameters and executing a map app.

52 is a flowchart showing an algorithm for storing starting map parameters in the sixth embodiment of the present invention. The step of storing the starting map parameters is a step in which the user selects a place to be displayed on the initial screen of the map app through interaction with the map app, and a step in which the user registers the selected place as a start place. The step of executing the menu, the map app stores map parameters including geographic coordinates corresponding to the starting place, building ID, bldID, and floor in the device's local storage ( local storage) as a starting map parameter.

As described above, in order to specify a place to be displayed on the initial screen of the map app, the geographic coordinates, the building ID (bldID), and the floor in the building must be included in the starting map parameters, and the zoom of the digital map It is desirable to include zoom and rotation as well. For the building ID and floor, a special number is used to inform the program that it is outdoors without substituting a null value when there is no building outside. The reason for not using null values is to store values as floats or integers when storing starting map parameters in local storage.

The building ID is preferably a natural number of 1 or more. That is, numbers are sequentially assigned starting from 1, such as "bldID = 1,2,3,4,5...", but it is not necessary to use consecutive numbers. For example, if the owner of a building insists on the lucky number 777 as the building ID for his building, he can do so, and for the same reason, he does not have to use 4 or 13 as his building ID. In addition, due to the nature of discrete mathematics, it is correct to start building numbers from 0, but if the building number is 0, it may cause emotional confusion to users, so start from 1 instead of 0.

The only condition required for building IDs is that all buildings have different IDs. Therefore, just as you decide on an ID when signing up for an SNS site, you can use a combination of English letters and numbers for your building ID. That is, the building ID can be 'BurjKhalifa0' or 'tallest_building_in_the_world_1'.

However, if the building ID is set in this way, time is wasted unnecessarily in searching for the building in the database. In addition, the building ID is not for user login to the map app, but for distinguishing buildings by registering them in a building database. Therefore, it is preferable to set the building ID as the simplest natural number, and the system sequentially recommends the number, but the user can ignore the recommended number and use the number he or she prefers. For example, the building ID of OK Venture Town is 1, the building ID of Daejeon Jungang-ro Underground Shopping Center is 101, and the building ID of Daejeon Station Underground Shopping Center is 102.

Since the ID of all existing buildings is a natural number greater than 1, the building ID of a place where no building exists, such as outdoors, can be set to -1. In other words, if the building ID included in the starting map parameter is -1, you can know that the place has no buildings.

The floor of the room is given as an integer. When indoors, the first floor is given as 0, the second floor as 1, the third floor as 2, the first basement floor as -1, and the second basement floor as -2. And when you are outdoors, your floor is given as 0. If the floor is 0 (floor = 0), but the building ID is -1 (bldID = -1), you can see that it is outside the building, not on the first floor.

On the other hand, Daejeon Jungang-ro Underground Shopping Center is a building without a ground floor. If you do not select B1 (B1) of Daejeon Jungang-ro Underground Shopping Center at the Daejeon Jungang-ro Intersection, the digital map does not display the indoor map of Daejeon Jungang-ro Underground Shopping Mall, only the outline of the building is displayed. The layer at this time can be displayed as infinity. Infinity is defined as a valid number in JavaScript syntax. Accordingly, if the building ID is a natural number greater than or equal to 1 and the number of floors is infinite, it is determined that the building exists at the geographical coordinates but the user is not inside the building. For example, you can think of standing in the middle of a crossroads on Jungang-ro, on the roof of a building, or trying to land on top of a building by parachute.

On the other hand, the steps of launching the map app include the user starting the map app, the map app checking whether there are starting map parameters stored in the device's local storage, and if there are the starting map parameters stored, the starting map parameters are the target. Specifying as goal map parameters, and if there is no saved start map parameter, specifying default map parameters as target map parameters, the place shown on the initial screen matches the target map parameters and displaying an initial screen to

53 is a flowchart illustrating an algorithm of a step of displaying an initial screen such that a place visible on the initial screen of a map app matches a target map parameter. In this step, first, a start map area is determined from the target map parameters, and an outdoor map is displayed in a view. Next, a search range is determined from the starting map area according to a predetermined rule. When the search range is determined, buildings whose representative points are located within the search range are searched in the building database to create a view range building list (Bld_ID). The view range building list is an array of building IDs (bldID) of buildings whose representative points are located within the search range.

Next, it is checked whether the building ID (goalBldID) included in the target map parameter is a valid building ID. If goalBldID is -1, it is an invalid building ID, and if it is a natural number greater than 1, it is a valid building ID. If goalBldID is a valid building ID, check if this building ID is included in the view range building list (Bld_ID), and if not included, search for a building with this building ID in the building database and add it to the view range building list.

Next, create a list of buildings to display outlines (bldIDsToShow) from the list of buildings in the view range. The outline display target building is a list of buildings whose zoom level for showing building outline (zoomShowBld) is smaller than the zoom level of the digital map among the buildings in the view range building list.

Next, building outline drawings of the buildings in the list of buildings to be marked as outlines are retrieved from the building data store and displayed at correct locations on the outdoor map. After that, the same plan view display step as in Example 5 is performed. If this method is used, the place shown in FIG. 49 is also registered as a starting place and operates without errors.

[Example 7]

Using the technology used in the inventions of the first to sixth embodiments, an outdoor map or an indoor map can be sent as a text message and shared with a recipient. That is, the seventh embodiment of the present invention relates to a method for sharing an indoor/outdoor place visible on a map app with a receiver by sending a text message, It consists of a sender sending a text message and a recipient selecting a received text message and executing a map app.

54 is a flow chart showing the algorithm of the sender sending a text message, and the sender selecting a place to be displayed on the initial screen of the map app running as a web app on the recipient's device through interaction with the map app. , The sender executes a menu that sends the selected place as a text message, and the map app includes a URL (Uniform Resource Locator) including map parameters corresponding to the selected place as a search string. and creating a text message body for sending the text message, selecting a recipient by the sender and sending the text message.

The step in which the recipient selects the received text message to launch the map app, the step in which the recipient selects the received text message to launch the map app that runs as a web app, and the map app launches the map from the search string included in the URL A step of extracting parameters (parse), and a step of displaying the initial screen so that places visible on the initial screen of the map app match the extracted map parameters.

Map parameters corresponding to the selected place include geographic coordinates, building ID and floor, as well as zoom and rotation of the map area. It is desirable to do

The building ID is given as a natural number of 1 or more when a building at view center exists, and is given as a number other than a natural number when the building at view center does not exist. For example, it can be given as -1.

The floor is given as 0 when the central building does not exist, and given as an integer when there is a central building and an indoor map is displayed, and the central building exists but indoors If the map is not displayed, it is given as a non-integer number. For example, it can be given as Infinity.

55 is a JavaScript code for extracting (parsing) a map parameter from a search string (window.location.search) included in a URL and storing it in session storage, and is a part of an index page (index.html). After replacing all colons (":") with ampersands ("&") in the search string, create a URLSearchParams object named searchParams from this search string. If this object is not an empty object (""), a new session storage (window.sessionStorage) is created. Next, read northing, easting, latitude, longitude, zoom, rotation, building ID, and floor from searchParams. Access and read are stored in variables called northing, easting, latitude, longitude, zoom, rotation, bldID, and floor, respectively. If there is a value corresponding to searchParams, the actual value is stored in the variable, and if there is no corresponding value, the variable becomes an empty variable with no value (null).

Finally, a mapParameters object named sessionMapParameters is created from these eight variables and stored in the session storage. To store sessionMapParameters in session storage, you must first convert them into strings. After that, the corresponding landing page is started by determining the device type and screen mode.

56 is the JavaScript code for creating a map parameter object. The northbound distance, eastbound distance, latitude, longitude, zoom, rotation, building ID, and floor passed as map parameters are stored in internal variables named __northing, __easting, __latitude, __longitude, __zoom, __rotation, __bldID, and __floor, respectively. . If both northbound and eastbound distances have valid values (line 4), the latitude and longitude are calculated from the northbound and eastbound distances (lines 6 and 8) and stored as a location object (line 10). If either of the northbound and eastbound distances do not have valid values, check whether latitude and longitude both have valid values. If both latitude and longitude have valid values, save them as a location object (line 11). If neither latitude nor longitude has a valid value, the location object is set to null (line 12). If the location object is not null (line 14), zoom, rotation, building ID, and floor are investigated, and if there is a value, the value is saved. If there is no value, the default value is used (lines 16 to 26).

The step of displaying the initial screen so that the place visible on the initial screen of the map app matches the extracted map parameters is the step of storing the extracted map parameters in session storage, using a media query Determining the device type and screen orientation, launching a landing page suitable for the device type and screen orientation, and storing the landing page in the session storage It includes getting map parameters, designating the map parameters retrieved from the session storage as target map parameters, and setting a map object to match the target map parameters.

In this way, if the search string included in the URL includes distance north and east, or latitude and longitude, the map app is started with the geographical coordinates. If both northbound and eastbound distances and latitude and longitude are included, use the northbound and eastbound distance values. If the URL does not contain geographic coordinates, the Maps app is launched with the starting map parameters stored in local storage. If the starting map parameters are not also saved, the map app will be launched with the default map parameters.

If the building ID and floor are valid values, it informs the exact location on the indoor map. If not, it is regarded as outdoor and only the outdoor map is displayed on the initial screen of the digital map. If zoom and rotation are included, the map screen sent by the sender is reproduced on the recipient's device as it is, otherwise only the location is indicated.

[Example 8]

At least two external environments are required to send a text message to a place shown on the screen by running a map app that runs as a web app on a smartphone. It has to be the internet, it has to be text messages. In addition, GPS sensors must work to send geographic coordinates as text messages in unfamiliar places where there is no address or where the location cannot be guessed. The GPS sensor works by receiving signals from satellites, so it must be in a place where you can see the sky, but it has nothing to do with wireless Internet or telephone networks.

Unlike when sending a text message of indoor and outdoor places shown on the map screen of a map app indoors, wireless Internet may not work outdoors. If the internet isn't working, you can't connect to the app server, outdoor map server, building database, or building data store. Therefore, you cannot use a map app written as a web app.

By the way, as mentioned above, if you use a progressive web app (PWA), which is a relatively new technology, you can use the app even in places where there is no internet. When you access a web app written in PWA (eg https://map.digitalearth.land) with Google Chrome, a menu button appears that can be installed on your PC or smartphone. When you press the install button, the source files from the app server are saved to your PC or smartphone, and an icon appears on the desktop. 57 shows a progressive web app (D.E.map) installed on a smartphone. Google Chrome, Google Maps, Naver Maps, and Kakao Maps are native apps, and D.E.map (https://map.digitalearth.land) is a PWA. As shown in FIG. 57, it is difficult to visually distinguish a native app from a progressive web app.

When you click the PWA icon on the desktop, it runs like a native app, and files that have already been imported are not re-imported. In the manifest file (manifest.json), specify the files to be saved on the PC or smartphone.

Apps written as PWAs will work even without wireless internet. When you run a PWA app in a place with Internet access, necessary source files or other assets are retrieved from the app server and stored in your smartphone. The next time you run the app in a place without Internet access, the app will run using the sources already stored in your smartphone.

In addition, even outdoor maps may not be displayed because the outdoor map server cannot be accessed in places without internet, but if the map app has already visited an area, the map tiles of the area may also be stored on the smartphone. . Therefore, outdoor maps can be viewed even in places where there is no internet. And even if you're stranded deep in the mountains, the GPS sensor will almost certainly work. And even in places where there is no wireless Internet, text messages are often available. A text message uses the same network as a phone call, and uses a network separate from the wireless Internet. So, if you're in an area where phone calls are available, you can use the Maps app to report your distress by texting the exact geographic coordinates rather than dictating the exact location of your distress in vague terms. An eighth embodiment of the present invention relates to a method for sending GPS coordinates as a text message in an environment where the Internet is not available and even an outdoor map is not available.

58 shows some of the various menus of the map app, with the 'send screen by text message' menu button and the 'copy URL for the screen' Menu button and 'send GPS coordinates by text message' menu button and 'register emergency contact information' menu button and 'send emergency text message' menu button )' menu button.

59 shows the initial screen of executing the map app written in PWA. For the test, both WiFi and data usage were blocked, but the app runs normally. In FIG. 59, the menu button 'send GPS coordinates by text message' was selected. This menu button has the name btnSendGPSCoordsBySMS.

60 to 61 show a part of JavaScript code that implements an algorithm for sending GPS coordinates as a text message. 60, it can be seen that an event listener is connected to the 'Send GPS coordinates as text message' menu button (btnSendGPSCoordsBySMS). When the menu button is selected (click or tap), it checks whether the Geolocation API is supported, and if supported, calls the API that reads the current location from the GPS sensor once.

The geolocation API is defined in the Internet standard, and getCurrentPosition (success, error, options) is an API that reads the coordinates only once by operating the GPS sensor. The success function is called if this API was executed successfully, and the error function is called if it fails. Options define how to call this API.

In FIG. 60, the option (GPSPositionOptions) obtains location information with a high level of precision (enableHighAccuracy: true), the browser can wait indefinitely for calculating the current location (timeout: Infinity), and the obtained information can be reused within 100 ms (maximumAge: 100) is the meaning. Also, if location information is successfully obtained, sendGPSCoordsBySMS function is executed, and if it fails, onGPSPositionError function is executed.

61 shows the source code of the sendGPSCoordsBySMS function. When this function is called, a position object with an internal name of _position is passed. The location object has a timestamp object and a coordinates object. The coordinate objects are latitude, longitude, altitude, accuracy for latitude and longitude, accuracy for altitude, heading of the device, and movement of the device. It has attributes called speed. Therefore, the following two lines of code are required to obtain geographic coordinates consisting of latitude and longitude from a location object.

let GPSLat = _position.coords.latitude;

let GPSLon = _position. coords. longitude;

After reading the latitude (GPSLat) and longitude (GPSLon) from the position object, calculate the northbound distance (GPSNorthing) and eastbound distance (GPSEasting) from them. If there is no internet, the map area is not displayed, so the values of map parameters such as zoom and rotation are meaningless. Therefore, a search string is created using only the northbound distance and the eastbound distance. However, since the calculated northbound and eastbound distances are given as real numbers with multiple decimal places, the search string is written with values rounded to the nearest decimal point. This is because the error of the GPS sensor is more than 5m, so the number of digits after the decimal point is meaningless. In FIG. 61, appHOME is the web app address (https://map.digitalearth.land). The rest of the code is the same as in Example 7.

62 shows a smartphone screen in which the inventor sent a text message to himself as the recipient. Meanwhile, FIG. 63 shows a screen where a map app is executed by turning on Wi-Fi again and selecting a text message. The reason I turned on the wifi is because I need to get the map tiles corresponding to the geographic coordinates contained in the search string.

As such, the invention of the eighth embodiment of the present invention is an invention related to a method of sharing GPS coordinates with a receiver by sending a text message, and the sender sends the text message and the receiver receives the It consists of selecting a text message and launching the map app.

64 is a flowchart showing the algorithm of the sender sending a text message, the sender starting a map app, the sender executing a menu to send GPS coordinates as a text message, and the map app sending a geolocation API (Geolocation API) to obtain a position object, the map app to read geographic coordinates from the acquired location object, the map app to include the geographic coordinates as a search string Creating a text message body including a URL (Uniform Resource Locator), and sending the text message by the sender selecting a recipient.

The step of the recipient selecting the received text message to launch the map app is the step of the recipient selecting the received text message to launch the map app, and the map app extracts geographic coordinates from the search string included in the URL. The parsing step includes displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographical coordinates.

The step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographic coordinates is to store the map parameters by adding default values for zoom and rotation to the extracted geographic coordinates. (session storage) step, using a media query (media query) to determine the device type (type) and screen orientation (screen mode) step, the device type and screen orientation (landing page suitable for the screen direction) landing page), fetching the map parameters stored in the session storage from the landing page, specifying the map parameters retrieved from the session storage as target map parameters, and matching the target map parameters. It involves setting up a map object.

As illustrated in FIG. 65, the situation in which GPS coordinates are sent by text message is probably a situation in which help is urgently requested from the National Police Agency, the Fire Administration, or the Ministry of Foreign Affairs. In this case, it is highly likely that the recipient of the text message is not an individual but a call center. Call centers will not accept calls or text messages on their smartphones. In this case, the device will be a PC connected to an SMS center or an SMS gateway, that is, a text message server.

[Example 9]

When women or children walk on dark and deserted streets at night, they are easily exposed to the risk of crime. Therefore, artificial intelligence CCTVs and emergency bells are installed in high-crime areas to request help by pressing the emergency bell in an emergency, or by recognizing a rescue request signal such as "Please help" with artificial intelligence software and automatically going to a rescue center such as 119. also connect. However, crimes do not occur only in high-crime areas, but can occur anytime, anywhere, and in particular, when traveling abroad and being exposed to danger, such a method cannot be used to cope with crime at all. And in an urgent moment, it can be difficult to call and ask for help.

In order to cope with such various situations, it would be desirable if a rescue request signal could be sent immediately by pressing a single button on a smartphone. The ninth embodiment of the present invention relates to a method for sharing GPS coordinates with a previously set receiver in a text message, and the sender registers emergency contact information. It consists of a step of sending a text message, a step of sending a text message, and a step of executing a map app by the recipient selecting the received text message.

66 is a flowchart showing an algorithm of a step of registering emergency contact information by a sender. This step includes starting the map app by the sender, executing a menu for registering emergency contact information by the sender and including an emergency contact telephone number to receive an emergency text message. Entering emergency contact information, and the Maps app saving emergency contact information to the device's local storage. When the 'register emergency contact information' menu button shown in FIG. 58 is selected, a screen for registering emergency contact information appears.

67 is an example of a smartphone screen for registering emergency contact information, and FIG. 68 shows a screen in which an inventor's own smartphone phone number is entered as an emergency contact phone number. Here, a user name and an emergency contact phone number (phone no. to send emergency text message) are fields that must be entered, and the rest are fields that can be entered selectively. If emergency contact information is entered and a save button is pressed, emergency contact information including a user name and emergency contact phone number is saved to the local storage of the smartphone.

The sender sends a text message, the sender starts the map app, the sender executes a menu to send the GPS coordinates as a text message, and the map app calls the geolocation API to create a location object (position object) step, the map app reads geographic coordinates from the location object, the map app obtains a URL (Uniform Resource Locator) containing the geographic coordinates as a search string Creating a text message body including the text message body, and sending a text message to a pre-registered emergency contact phone number by the map app. When the sender selects the 'send emergency text message' menu button shown in FIG. 58, an emergency text message can be sent.

69 shows JavaScript code for creating and sending an emergency text message. Line 3 gets the username (userName) stored in local storage, and lines 5 and 7 get the phone number to send the pre-composed message and emergency text message to. In lines 9 and 11, the latitude (GPSLat) and longitude (GPSLon) are read from the position object _position, and in lines 13 and 15, the distance north (GPSNorthing) and the distance (GPSEasting) are calculated from the latitude and longitude. do. In lines 18 to 19, a text message body is created. The text message body includes a URL including geographic coordinates (GPSNorthing, GPSEasting) as a search string, a user name (userName), and a pre-written message. Create an anchor element with the name linkSMS on line 21, attach it to a document on line 23, create the href attribute of linkSMS so that text messages can be sent on line 25, and then add this linkSMS on line 27. Click programmatically to send a text message.

70 shows an urgent text message sent in this way. This text message includes a pre-written message suitable for the situation and the minimum personal information of the person to be rescued, and an Internet link where the location of the person to be rescued can be checked on a map.

The step of the recipient selecting the received text message to launch the map app is the step of the recipient selecting the URL included in the received text message to start the map app running as a web app, and the map app starting the map app from the search string included in the URL. Extracting (parsing) geographic coordinates; and displaying the initial screen so that a map area visible on the initial screen of the map app matches the geographical coordinates.

Using the invention of the ninth embodiment of the present invention, a rescue request can be made quickly with minimal effort in an emergency situation. For example, a rescue request can be made by launching the Maps app, clicking the 'send emergency text message' button, and pressing the confirm button in the text message window. In addition, if you are in an area where you can only call anywhere on the planet, such as the Arctic, Antarctic, or the Sahara Desert, you can call for help using this map app, and no wireless internet is required.

In the step of registering emergency contact information, the name of the smartphone owner, that is, the person to be rescued, a personal identification number such as a resident registration number or passport number for identification of the person to be rescued, the phone number of the rescue authority, and the information required by the rescue authority in the rescue phase. You can register the names and phone numbers of family members or acquaintances that can be obtained, and whether or not you agree to the rescue authorities' personal information inquiry if necessary.

Rescue authorities to send emergency text messages may vary depending on the situation, such as 119, the National Police Agency, the Fire Agency, or the embassy of each country. For example, a high school girl who studies and returns home late at night would be good to register the phone number of the police station in her area of residence. Travelers going to Finland to see the aurora would do well to register the phone number of the Korean embassy in Finland in advance. In addition to storing emergency contact information in the device's local storage, storing it on the app server will also allow you to respond more flexibly to emergencies.

[Example 10]

Sometimes you can't even do the simple act of launching the Maps app and pressing the menu button. For example, if you fall down a mountain due to a slip while climbing a cliff, or if you suddenly get into a car accident while walking on the road. In addition, the same applies to cases in which the elderly or patients suffer a fall accident.

In a case like this, it would be helpful if the map app could automatically signal a rescue call when the person to be rescued is unable to send a call for help directly. The most appropriate way to make this possible is to have your app run in the background. An example is Siri on the iPhone. You can also set apps to run in the background on Microsoft Windows. In other words, even if the map app is not intentionally started, the map app waits while the smartphone is on while consuming minimal smartphone resources, and automatically registers the rescue request signal in advance when the conditions for sending the rescue request signal are met. You can send it to a rescue organization or an acquaintance.

A tenth embodiment of the present invention relates to a method for sharing GPS coordinates with a receiver set in advance in an automatically sent text message, wherein the user provides emergency contact information (emergency contact information). ), the map app automatically sends a text message, and the recipient selects the received text message and executes the map app.

The step of registering emergency contact information by the user is the step of the user starting the map app, the user executing a menu for registering emergency contact information, and selecting an emergency contact telephone number to receive an emergency text message. number), and the map app stores the emergency contact information in the device's local storage, which is substantially the same as the step of registering the emergency contact information in the ninth embodiment.

However, in the tenth embodiment, it would be desirable if the map app could personalize the conditions for sending an emergency text message. For example, if you shout "Help" with your own voice, an emergency text message is sent, or if you tap the desktop app icon 3 times within 3 seconds, an emergency text message is sent. can think of Conditions that are basically set include a case in which an impact of a certain level or more is applied to the smartphone, or a case in which a certain amount of noise is generated. As for the condition for sending an urgent text message, it would be desirable to allow one or more to be selected, rather than having to select one of them.

71 is a flowchart showing an algorithm of automatically sending a text message according to a tenth embodiment of the present invention. The step in which the map app automatically sends a text message is the step in which the map app runs in the background and monitors whether the conditions to automatically send an emergency text message are met. The map app calls the Geolocation API to obtain a position object, the map app reads geographic coordinates from the location object, and the map app retrieves the geographic coordinates Creating a text message body including a URL (Uniform Resource Locator) included as a search string, including sending a text message to a pre-registered emergency contact phone number by the map app do.

The step of the recipient selecting the received text message to launch the map app is the step of the recipient selecting the received text message to start the map app running as a web app. The map app obtains geographic coordinates from the search string included in the URL. A parsing step, and a step of displaying the initial screen so that a map area visible on the initial screen of the map app matches the geographical coordinates.

Instead of calling out an address or geographic coordinates, you can simply send a text message to the recipient and share your location on a digital map. It can be used to tell visitors where to come, or to tell a delivery person where to go, or it can be used for search & rescue missions by 119, the National Police Agency, and the Fire and Rescue Agency.

Claims (49)

1. A method for personalizing a map area shown on the initial screen of a map app executed as a web app for each device,

   It consists of saving start map parameters and running a map app,

   Storing the starting map parameters includes;

   Selecting a map area to be displayed on the initial screen of the map app through interaction with the map app by a user;

   Executing a menu for registering the selected map area as a start map area;

   The Maps app stores map parameters, including geographic coordinates corresponding to the starting map area and zoom and rotation, to the device's local storage. Including the step of saving as,

   The step of running the map app is;

   When the user launches the map app,

   The map app checks if there are starting map parameters stored in the device's local storage;

   Specifying the starting map parameters as goal map parameters if there are saved starting map parameters, and specifying the default map parameters as goal map parameters if there are no saved starting map parameters. ,

   Characterized in that it comprises the step of displaying the initial screen so that the map area visible on the initial screen of the map app meets the target map parameters,

   How to personalize the map area shown on the initial screen of the map app running as a web app for each device.
2. According to claim 1,

   Characterized in that the geographical coordinates corresponding to the starting map area are given as a pair of longitude and geodetic latitude,

   How to personalize the map area shown on the initial screen of the map app running as a web app for each device.
3. According to claim 1,

   The geographic coordinates corresponding to the starting map area are given as a pair of longitude and geodetic latitude and a pair of easting and northing distances that can be converted to each other. ,

   How to personalize the map area shown on the initial screen of the map app running as a web app for each device.
4. According to claim 3,

   The northing distance N is given by

   

   where R is the mean radius of the Earth, φ is the geodetic latitude,

   The easting distance E is given by

   

   Where λ is characterized in that the hardness,

   How to personalize the map area shown on the initial screen of the map app running as a web app for each device.
5. According to claim 1,

   Storing the starting map parameters includes;

   Checking whether user login is in the app server,

   If the user is logged in, saving the starting map parameters to the app server;

   The step of running the map app is;

   Steps to check if the user is logged in to the app server,

   If the user is logged in, checking whether there are starting map parameters stored in the app server;

   If there is a starting map parameter stored in the app server, specifying the starting map parameter stored in the app server as a target map parameter preferentially.

   How to personalize the map area shown on the initial screen of the map app running as a web app for each device.
6. In a method of sharing a map area visible in a map app running as a web app by sending a text message to a receiver,

   It consists of a sender sending a text message and a recipient selecting the received text message and launching a map app.

   The sender sends a text message;

   Selecting a map area to be displayed on the initial screen of the map app running as a web app on the recipient's device through interaction with the map app by the sender;

   The sender executing a menu to send a selected map area as a text message;

   A uniform resource URL (URL) that includes map parameters, including zoom and rotation, as well as geographic coordinates corresponding to the map area selected by the Maps app as a search string. Creating a text message body including a locator;

   The sender selects a recipient and sends the text message,

   The step of executing the map app by selecting the received text message by the recipient;

   Step of the recipient selecting the received text message to launch the map app;

   A step in which the map app extracts (parses) map parameters from the search string included in the URL;

   Characterized in that it comprises the step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the extracted map parameters,

   How to share a map area visible on a map app running as a web app with a recipient by sending a text message.
7. According to claim 6,

   Characterized in that the geographical coordinates corresponding to the selected map area are given as a pair of longitude and geodetic latitude,

   How to share a map area visible on a map app running as a web app with a recipient by sending a text message.
8. According to claim 6,

   Characterized in that the geographical coordinates corresponding to the selected map area are given as a pair of longitude and geodetic latitude and a pair of easting and northing distances that can be converted to each other,

   How to share a map area visible on a map app running as a web app with a recipient by sending a text message.
9. According to claim 8,

   The northing distance N is given by

   

   where R is the mean radius of the Earth, φ is the geodetic latitude,

   The easting distance E is given by

   

   Where λ is characterized in that the hardness,

   How to share a map area visible on a map app running as a web app with a recipient by sending a text message.
10. According to claim 6,

    Characterized in that the map app is a Progressive Web App (PWA),

    How to share a map area visible on a map app running as a web app with a recipient by sending a text message.
11. According to claim 6,

    The step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the extracted map parameters,

    Storing the extracted map parameters in session storage;

    Determining a type of device and a screen mode using a media query;

    Launching a landing page suitable for the type of device and screen orientation;

    Retrieving map parameters stored in session storage on the landing page;

    storing map parameters obtained from session storage as target map parameters;

    Characterized in that it comprises the step of setting a map object (map object) to match the target map parameters,

    How to share a map area visible on a map app running as a web app with a recipient by sending a text message.
12. A method for personalizing an indoor/outdoor place shown in a map app running as a web app for each device, the method comprising:

    It consists of saving start map parameters and running a map app,

    Storing the starting map parameters includes;

    Selecting a place to be displayed on the initial screen of the map app through interaction with the map app by the user;

    Executing a menu for registering a place selected by a user as a start place;

    The map app stores map parameters corresponding to the starting location as starting map parameters in local storage of the device;

    The step of running the map app is;

    When the user launches the map app,

    The map app checks if there are starting map parameters stored in the device's local storage;

    Specifying the starting map parameters as goal map parameters if there are saved starting map parameters, and specifying the default map parameters as goal map parameters if there are no saved starting map parameters. ,

    Characterized in that it comprises the step of displaying the initial screen so that the place visible on the initial screen matches the target map parameters,

    How to personalize the indoor and outdoor places shown in the map app running as a web app for each device.
13. According to claim 12,

    Characterized in that the map parameters corresponding to the starting place include geographical coordinates, building ID and floor,

    How to personalize the indoor and outdoor places shown in the map app running as a web app for each device.
14. According to claim 13,

    Characterized in that the map parameter corresponding to the starting place includes zoom and rotation of the map area to be displayed on the initial screen of the map app.

    How to personalize the indoor and outdoor places shown in the map app running as a web app for each device.
15. According to claim 13,

    Geographic coordinates are defined as either a pair of longitude and geodetic latitude, or a pair of easting and northing interconverted with a pair of longitude and geodetic latitude. Characterized in that one is given,

    How to personalize the indoor and outdoor places shown in the map app running as a web app for each device.
16. According to claim 15,

    The northing distance N is given by

    

    where R is the mean radius of the Earth, φ is the geodetic latitude,

    The easting distance E is given by

    

    Where λ is characterized in that the hardness,

    How to personalize the indoor and outdoor places shown in the map app running as a web app for each device.
17. In a method of sending an indoor/outdoor place visible on a map app running as a web app as a text message to share with a receiver,

    It consists of a sender sending a text message and a recipient selecting the received text message and launching a map app.

    The sender sends a text message;

    the sender launching the map app;

    The sender selects a place to be displayed on the initial screen of the map app running as a web app on the recipient's device through interaction with the map app;

    The sender executes a menu to send a text message to the selected place;

    Creating a text message body including a URL (Uniform Resource Locator) including map parameters corresponding to the selected place by the map app as a search string;

    The sender selects a recipient and sends the text message,

    The step of executing the map app by selecting the received text message by the recipient;

    Step of the recipient selecting the received text message to launch the map app;

    A step in which the map app extracts (parses) map parameters from the search string included in the URL;

    Characterized in that, including the step of displaying the initial screen so that the place visible on the initial screen of the map app matches the extracted map parameters,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
18. According to claim 17,

    Characterized in that a center marker is provided on the map screen of the map app,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
19. According to claim 17,

    Characterized in that the map parameters corresponding to the selected place include geographic coordinates, building ID and floor,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
20. According to claim 19,

    Characterized in that the map parameters corresponding to the selected place include zoom and rotation of the map area to be displayed on the initial screen of the map app.

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
21. According to claim 19,

    Characterized in that geographical coordinates are given as a pair of longitude and geodetic latitude,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
22. According to claim 19,

    Characterized in that the geographic coordinates are given as a pair of longitude and geodetic latitude and a pair of interconvertible easting and northing distances,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
23. The method of claim 22,

    The northing distance N is given by

    

    where R is the mean radius of the Earth, φ is the geodetic latitude,

    The easting distance E is given by

    

    Where λ is characterized in that the hardness,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
24. According to claim 19,

    The building ID is given as a natural number when a building whose view center is located within the outline of the building - hereinafter referred to as a building at view center - exists, ,

    Characterized in that it is given as a number other than a natural number when the central building does not exist,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
25. According to claim 19,

    The floor is given as 0 when a building whose view center is located within the outline of the building - hereinafter referred to as a building at view center - does not exist,

    If there is a central building and an indoor map is displayed, it is given as an integer,

    Characterized in that it is given as a non-integer number when the central building exists but the indoor map is not displayed,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
26. According to claim 17,

    Characterized in that the map app is a Progressive Web App (PWA),

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
27. According to claim 17,

    The step of displaying the initial screen so that the place visible on the initial screen of the map app matches the extracted map parameters,

    Storing the extracted map parameters in session storage;

    Determining a type of device and a screen mode using a media query;

    Launching a landing page suitable for the type of device and screen orientation;

    Retrieving map parameters stored in session storage on the landing page;

    specifying map parameters obtained from session storage as target map parameters;

    Characterized in that it comprises the step of setting a map object (map object) to match the target map parameters,

    A method of sharing indoor and outdoor places shown in a map app running as a web app with a recipient by sending a text message.
28. In the method of sharing GPS coordinates by text message,

    It consists of the sender sending a text message and the recipient selecting the received text message and launching the map app.

    The sender sends a text message;

    the sender launching the map app;

    The sender executing a menu to send GPS coordinates as a text message;

    Acquiring a position object by calling a geolocation API by the map app;

    The map app reading geographic coordinates from the location object;

    Creating a text message body including a URL (Uniform Resource Locator) including geographic coordinates as a search string by the map app;

    The sender selects a recipient and sends the text message,

    The step of executing the map app by selecting the received text message by the recipient;

    Step of launching (launching) a map app running as a web app by selecting the received text message by the recipient;

    A step in which the map app extracts (parses) geographical coordinates from the search string included in the URL;

    Characterized in that it includes the step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographical coordinates,

    How to share GPS coordinates by text message.
29. According to claim 28,

    Characterized in that geographical coordinates are given as a pair of longitude and geodetic latitude,

    How to share GPS coordinates by text message.
30. According to claim 28,

    Characterized in that the geographic coordinates are given as a pair of longitude and geodetic latitude and a pair of interconvertible easting and northing distances,

    How to share GPS coordinates by text message.
31. 31. The method of claim 30,

    The northing distance N is given by

    

    where R is the mean radius of the Earth, φ is the geodetic latitude,

    The easting distance E is given by

    

    Where λ is characterized in that the hardness,

    How to share GPS coordinates by text message.
32. According to claim 28,

    Characterized in that the map app is a Progressive Web App (PWA),

    How to share GPS coordinates by text message.
33. According to claim 28,

    The step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographical coordinates,

    Storing map parameters with default values for zoom and rotation added to geographic coordinates in session storage;

    Determining a type of device and a screen mode using a media query;

    Launching a landing page suitable for the type of device and screen orientation;

    Retrieving map parameters stored in session storage on the landing page;

    storing map parameters obtained from session storage as target map parameters;

    Characterized in that it comprises the step of setting a map object (map object) to match the target map parameters,

    How to share GPS coordinates by text message.
34. According to claim 28,

    Characterized in that the device is any one of a smart phone and a text message server,

    How to share GPS coordinates by text message.
35. A method for sharing GPS coordinates with a pre-registered receiver by text message,

    It consists of registering emergency contact information by the sender, sending a text message by the sender, and executing a map app by selecting the received text message by the recipient.

    The sender registering emergency contact information;

    the sender launching the map app;

    Entering emergency contact information including an emergency contact telephone number to receive an emergency text message by executing a menu in which the sender registers emergency contact information;

    the map app saving the emergency contact information to the device's local storage;

    The sender sends a text message;

    the sender launching the map app;

    The sender executing a menu to send GPS coordinates as a text message;

    Acquiring a position object by calling a geolocation API by the map app;

    The map app reading geographic coordinates from the location object;

    Creating a text message body including a URL (Uniform Resource Locator) including geographic coordinates as a search string by the map app;

    The map app sends a text message to a pre-registered emergency contact number;

    The step of executing the map app by selecting the received text message by the recipient;

    Step of launching (launching) a map app running as a web app by selecting the received text message by the recipient;

    A step in which the map app extracts (parses) geographical coordinates from the search string included in the URL;

    Characterized in that it includes the step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographical coordinates,

    How to share GPS coordinates with pre-registered recipients by text message.
36. The method of claim 35,

    Characterized in that the geographic coordinates are given as a pair of longitude and geodetic latitude,

    How to share GPS coordinates with pre-registered recipients by text message.
37. The method of claim 35,

    Characterized in that the geographic coordinates are given as a pair of longitude and geodetic latitude and a pair of interconvertible easting and northing distances,

    How to share GPS coordinates with pre-registered recipients by text message.
38. 38. The method of claim 37,

    The northing distance N is given by

    

    where R is the mean radius of the Earth, φ is the geodetic latitude,

    The easting distance E is given by

    

    Where λ is characterized in that the hardness,

    How to share GPS coordinates with pre-registered recipients by text message.
39. The method of claim 35,

    Characterized in that the map app is a Progressive Web App (PWA),

    How to share GPS coordinates with pre-registered recipients by text message.
40. The method of claim 35,

    The step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographical coordinates,

    Storing map parameters with default values for zoom and rotation added to geographic coordinates in session storage;

    Determining a type of device and a screen mode using a media query;

    Launching a landing page suitable for the type of device and screen orientation;

    Retrieving map parameters stored in session storage on the landing page;

    specifying map parameters obtained from session storage as target map parameters;

    Characterized in that it comprises the step of setting a map object (map object) to match the target map parameters,

    How to share GPS coordinates with pre-registered recipients by text message.
41. The method of claim 35,

    Characterized in that the device is any one of a smart phone and a text message server,

    How to share GPS coordinates with pre-registered recipients by text message.
42. The method of claim 35,

    Emergency contact information includes the name of the person to be rescued, a personal identification number for identification of the person to be rescued, the phone number of the rescue authority, the name and phone number of a family member or acquaintance from whom the rescue authority can obtain the necessary information, and the rescue authority of the person to be rescued. Characterized in that it includes any one or more of whether or not to agree to inquire personal information,

    How to share GPS coordinates with pre-registered recipients by text message.
43. In the method of sharing GPS coordinates with a pre-registered receiver in a text message that is automatically sent,

    It consists of the user registering emergency contact information, the map app automatically sending a text message, and the recipient selecting the received text message to launch the map app.

    Registering emergency contact information by the user;

    When the user launches the Maps app,

    Entering emergency contact information including an emergency contact telephone number to receive a text message by a user executing a menu for registering emergency contact information;

    The Maps app saves the emergency contact information to the device's local storage;

    The steps of the map app automatically sending a text message are;

    A step of monitoring whether the map app is running in the background and the conditions for automatically sending text messages are met;

    When a condition for automatically sending a text message is met, the map app calls a geolocation API to obtain a position object;

    The map app reading geographic coordinates from the location object;

    Creating a text message body including a URL (Uniform Resource Locator) including geographic coordinates as a search string by the map app;

    The map app sends a text message to a pre-registered emergency contact number;

    The step of executing the map app by selecting the received text message by the recipient;

    Step of launching (launching) a map app running as a web app by selecting the received text message by the recipient;

    A step in which the map app extracts (parses) geographical coordinates from the search string included in the URL;

    Characterized in that it includes the step of displaying the initial screen so that the map area visible on the initial screen of the map app matches the geographical coordinates,

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.
44. 44. The method of claim 43,

    Characterized in that geographical coordinates are given as a pair of longitude and geodetic latitude,

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.
45. 44. The method of claim 43,

    Characterized in that the geographic coordinates are given as a pair of longitude and geodetic latitude and a pair of interconvertible easting and northing distances,

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.
46. 46. The method of claim 45,

    The northing distance N is given by

    

    where R is the mean radius of the Earth, φ is the geodetic latitude,

    The easting distance E is given by

    

    Where λ is characterized in that the hardness,

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.
47. 44. The method of claim 43,

    Characterized in that the map app is a Progressive Web App (PWA),

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.
48. 44. The method of claim 43,

    Characterized in that the device is any one of a smart phone and a text message server,

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.
49. 44. The method of claim 43,

    Emergency contact information includes the name of the person to be rescued, a personal identification number for identification of the person to be rescued, the phone number of the rescue authority, the name and phone number of a family member or acquaintance from whom the rescue authority can obtain the necessary information, and the rescue authority of the person to be rescued. Characterized in that it includes any one or more of whether or not to agree to inquire personal information,

    A method of sharing GPS coordinates with pre-registered recipients in an automatically sent text message.

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