JP2011141153A - Portable terminal and view information display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display accurate view confirmation information relative to a view at an altitude of a place where a user is actually located, even if the user is anywhere, concerning a portable terminal and a view information display method. <P>SOLUTION: The portable terminal includes: an altitude storage part 1-72 for storing the altitude of a ground surface in each grating of a map; a view object information storage part 1-73 for storing data of the name, the position and the altitude of each mountain of a view confirmation object; and present position detection sensors 1-3, 1-4 for detecting the latitude, the longitude and the altitude of a present position. A control part 1-6 reads the position and the altitude of a view object mountain from the view object information storage part 1-73, determines each grating just under a connection line for connecting the present place to the top of the view object mountain, compares the altitude of the connection line with the altitude of the ground surface in each grating, and determines that the view object mountain can be viewed when the altitude of the connection line is higher than the altitude of the ground surface in each grating. A determination result of view propriety and the view confirmation object including the name of the view object mountain are displayed on a screen by an output part 1-2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable terminal that displays information related to a view of surrounding mountains and the like, and a view information display method.

  There are times when you want to enjoy the scenery on a rooftop of a building with a good view, an observatory, a mountaintop, a hillside, etc. where you can see a wide range of mountains. In observation decks that are well maintained, there are cases where bulletin boards displaying the direction of the mountains to be viewed and their names and heights are installed. There are many cases where such a bulletin board is not installed on a hill in the middle of a mountain road.

  However, even in such a place, you may want to see what kind of mountains you can see and see the scenery of the mountains you can see with your own eyes or using a telescope. . In particular, if the information on the mountains that can be viewed can be displayed on the screen of a mobile terminal such as a mobile phone, such as when the view expands by walking around the mountains, the scenery of the mountains can be enjoyed more.

  As such a portable terminal, a landscape display device or the like that displays a landscape in an arbitrary direction at an arbitrary location, or automatically searches for a location with the best scenery, and displays a landscape guidance in accordance with movement, for example, Patent Document 1 and the like. The conventional device for displaying scenery, etc. displays the scenery of mountains, etc. viewed from any position using the altitude information of the map, and also displays the mountain name, altitude, etc., and a plurality of preset locations It has the function to calculate the evaluation value of the scenery and find the place with the best scenery.

  Further, a map display device that creates a three-dimensional CG map in which a map is viewed from an arbitrary viewpoint based on map data and altitude data defined for each subdivided area is disclosed in, for example, Patent Document 2 below. Are known. These map display devices and the like display roads, landscapes, buildings, and the like included in the map as landscapes that are realistic.

JP 2002-195844 A JP-A-10-187029

  In a conventional landscape display device or the like, since the altitude at the current position is recognized by reading the altitude data of the map, only rough altitude data can be acquired. Therefore, for example, when there are observation decks, tall buildings, high grounds, etc. nearby, and if you climb them to check the surrounding mountains, the heights of buildings, high grounds, etc. that are not reflected in the map elevation data are ignored. Is done.

  As a result, view information of surrounding mountains and the like is generated based on the height of the ground surface (ground) at the current position of the device, and the view at the actual position (height) of the device cannot be displayed with high accuracy. Similarly, when checking the view from a height away from the ground (ground), such as a suspension bridge, ferris wheel, or ropeway, the altitude cannot be obtained from map data, etc., so a position that is different from the actual view position ( Only view information at the height of the surface) can be obtained. Further, when confirming a view from a vehicle such as a hot air balloon, an airship, or a helicopter, the altitude data on the map is completely useless. The present invention makes it possible to display accurate view confirmation information for a view at an altitude of a place where the user is actually located, regardless of where the user is located.

  A portable terminal as one form of means for solving the above problems, an elevation storage unit for storing the elevation of the ground surface for each grid of the map divided by a grid of division lines along the directions of the latitude line and the longitude line, A view target information storage unit that stores data on the name, position, and altitude of the view check target, a current position detection sensor that detects the latitude, longitude, and altitude of the current position, and a position of the view check target from the view target information storage unit And the altitude is read out, each grid directly below the direct connection line connecting the current position detected by the current position detection sensor and the top of the view confirmation target is obtained, the altitude of the direct connection line is calculated for each grid, and the direct connection The elevation of the line and the elevation of the ground surface read from the elevation storage unit are compared for each grid, and when the elevation of the direct connection line is higher than the elevation of the ground surface in all of the grids, the view confirmation target can be viewed System to judge And an output unit that outputs the view confirmation information including the result of the view determination determined by the control unit and the name of the view confirmation target read from the view target information storage unit to be displayed on the screen. It is provided.

  According to this portable terminal, view confirmation information at the altitude of the user's actual view position is displayed. For this reason, accurate view information can be obtained even from positions such as observation decks, tall buildings, hills, suspension bridges, ferris wheels, ropeways, hot air balloons, airships, helicopters, etc. that are not included in the map in advance as data.

It is a figure which shows the structural example of a portable terminal. It is a figure which shows the processing flow of the display of view information. It is a figure which shows the example of a view range. It is a figure which shows an example of the arrangement | positioning relationship between the direct connection line which connects the peak of an analysis object, and the present position, and a grating | lattice. It is a figure which shows an example of the altitude of the ground surface of the direct connection line which connects a present position and a mountaintop, and each lattice directly under it. It is a figure which shows the example of the input screen of a portable terminal. It is a figure which shows the example of the output screen of a portable terminal.

  The disclosed mobile terminal first obtains the latitude and longitude of the current position of the mobile terminal using a current position detection sensor such as a GPS sensor. Further, the altitude of the current position is obtained by a current position detection sensor using an altitude sensor such as a GPS sensor capable of measuring altitude or a barometer. Next, information on the current position (latitude, longitude, and altitude) of the mobile terminal and map data such as “numerical map 50 m mesh (elevation)” including altitude data by the Geographical Survey Institute, etc. are used. Analyzes of the visibility of each mountain around the mountain.

  In this way, the latitude, longitude, and altitude of the current location of the mobile terminal are obtained in real time, and whether or not the surrounding mountains from the current location can be viewed is determined. And the height of the top is displayed to notify the user. Therefore, even when the surroundings are viewed from a place such as an observatory, a tall building, or a hill that is not included in the map in advance, it is possible to notify the user of accurate viewing information from those places.

  FIG. 1 shows a configuration example of this portable terminal. In FIG. 1, an input unit 1-1 has an input interface such as a microphone, a touch panel, a button, and a keyboard, and receives input information from a user. For example, it accepts input information such as a view confirmation request from a user and a view range (how far a view distance should be analyzed).

  The output unit 1-2 has an output interface such as a display (LCD), a speaker (SPK), and a receiver, and displays output information to the user visually or audibly. For example, as a result of determining whether or not the view is possible, the azimuth, the height of the summit, the name, and the like are displayed on the display for the view confirmation target of the view confirmation target such as the surrounding mountains and the view confirmation target such as the viewable mountain.

  The GPS sensor 1-3 detects the current position (latitude / longitude) of the mobile terminal by a global positioning system. The altitude sensor 1-4 detects the altitude (altitude) of the mobile terminal based on the measurement results of a GPS sensor, a barometer, or the like that can also measure the altitude. If a barometer is used, the altitude value is adjusted in advance according to the barometric conditions of the time zone to be used. The geomagnetic sensor 1-5 detects the direction in which the screen of the mobile terminal is facing.

  Upon receiving a view confirmation request, the control unit 1-6 obtains each grid on the map through which a direct connection line connecting the top of the view confirmation target such as surrounding mountains and the current position passes, and connects the top to the current position. Control is performed to compare the altitude calculation value corresponding to each grid of the direct connection line with the altitude of the ground surface of each grid on the map. Further, the direction of the top is calculated from the current position and the top position of the view confirmation target. Further, the direction in which the screen of the portable terminal is facing is read from the geomagnetic sensor 1-5. Then, control is performed to display on the screen of the mobile terminal whether or not the view confirmation target such as mountains in the direction in which the screen is facing, the name of the view confirmation target that can be viewed, the height of the top, and the like.

  The control unit 1-6 includes an input unit 1-1, an output unit 1-2, a GPS sensor 1-3, an altitude sensor 1-4, a geomagnetic sensor 1-5, a memory (range storage unit, altitude storage unit, view The target information storage unit and view confirmation information storage unit) 1-7 are controlled.

  The range storage unit 1-71 of the memory 1-7 stores information on a view range (how far a view distance is analyzed) input by the user. The elevation storage unit 1-72 stores the definition of the grid in the map data and the elevation of the center of each grid on the map. In general, the grid is defined based on latitude and longitude, and elevation data of each grid can be obtained by, for example, “Numerical Map 50m Mesh (Elevation)” of the Geospatial Information Authority of Japan.

  The view object information storage unit 1-73 stores the names of all the view objects such as mountains existing in the whole country or a specific region, the latitude / longitude of the summit, and the altitude data. The view confirmation information storage unit 1-74 stores view confirmation information analyzed on the mountain view from the current position of the mobile terminal.

  The radio unit 1-8 and the baseband signal processing unit 1-9 are used when the mobile terminal is used as a radio communication terminal such as a mobile phone terminal. The power supply 1-10 supplies power to each functional unit of the mobile terminal.

  A processing flow for displaying the view information is shown in FIG. A portable terminal inputs the distance of the view range of the view confirmation object of the mountains etc. which a user desires for view from the input part 1-1 (2-1). The mobile terminal extracts the mountains existing in the range up to the distance from the current position based on the information in the view target information storage unit 1-73 (2-2).

  A portable terminal calculates the direction for every extracted mountain (2-3). The mobile terminal calculates the altitude (elevation) of the current position (2-4). Then, a direct connection line connecting the current position of the mobile terminal and the top of each extracted view confirmation target such as a mountain is calculated as a linear expression in a three-dimensional space (2-5). The presence or absence of undulations such as other mountains existing at the position directly below the direct connection line is checked (2-6).

  For each view confirmation target, the undulation information (presence / absence and altitude) of the azimuth and the mountain directly below the direct connection line is stored in the view confirmation information storage unit 1-74 (2-7). Next, the direction to which the mobile terminal is directed is obtained, information such as the mountains of the direction is read from the view confirmation information storage unit 1-74, and the analysis result relating to the view of the direction is displayed on the screen of the mobile terminal (2). -8).

  The above-described view information display process will be described in detail. Examples of the above-described view confirmation target include a mountain, a building, a building such as a tower, an island, and the like. Hereinafter, an embodiment in which a mountain is the view confirmation target will be described as an example.

  (1) The user inputs, via the input unit 1-1, a desired view range (distance from the current position) to which notification of information about the view of distant mountains from the current position is to be received in advance. To do. For example, as shown in FIG. 6A, the distance can be inputted by selecting and inputting a preset numerical value of several kilometers to several hundred kilometers. The larger the distance, the wider the view information of the mountains.

(2) The input unit 1-1 notifies the control unit 1-6 of the input distance value.
(3) The control unit 1-6 notifies the range storage unit 1-71 of the distance value.
(4) The range storage unit 1-71 stores the distance value.

  (5) When a user hits a place where the field of view is open and desires view confirmation information of surrounding mountains, the user inputs a view information display request to the portable terminal. For example, as shown in FIG. 6B, the input of the request to the mobile terminal is performed by displaying a confirmation display indicating that the view direction of the mountains existing in the range of the distance already input is measured, and confirming (OK). ) Prompt to operate the button.

(6) The portable terminal accepts an input by operating the OK (OK) button at the input unit 1-1 as a view information display request.
(7) The input unit 1-1 notifies the control unit 1-6 of the view information display request.
(8) Upon receiving the notification, the control unit 1-6 instructs the GPS sensor 1-3 to measure the current position.

(9) The GPS sensor 1-3 measures the current position of the mobile terminal and returns the measurement result to the control unit 1-6.
(10) The control unit 1-6 extracts information on the mountains to be viewed from the view target information storage unit 1-73.
(11) When extracting the information on the above-mentioned mountains, the control unit 1-6 extracts information on the mountains existing within the range up to the distance input by the user, the name of each extracted mountain, and the latitude of the peak.・ Longitudinal and elevation information is extracted.

  In addition, since the latitude is about 111 km per degree, for example, when about 100 km is input as the view range, mountains within a range where the latitude is approximately ± 1 degree are extracted from the current position. Next, it extracts from the longitude based on it. In the case of Japan, since it is 80 km to 100 km per longitude, when about 100 km is input as the distance of the view range, mountains within a range of about ± 1 degree longitude are extracted from the current position.

  Finally, the sum of absolute values | x | and | y | for the differences x and y between the current position and the longitude and latitude of the view range from those mountains, that is, (| x | + | y |) Calculates a range of √2 or less for both latitude and longitude, and extracts mountains within the range. By doing so, it is possible to extract mountains in the range of approximately 100 km or less.

The reason why the above range (| x | + | y |) is within a range of √2 will be described. FIG. 3 shows a view range centered on the current position, with the x-axis being longitude and the y-axis being latitude. Using a trigonometric function, a straight line connecting two points, a point of longitude √2 degrees to the east from the current position and a point of latitude √2 degrees to the north, and a longitude √2 degrees to the north and a point √2 degrees of latitude A straight line connecting two points with two degrees, a straight line connecting two points, a point of longitude √2 degrees to the west and a point of latitude √2 degrees to the south, and a point of latitude √2 degrees to the south And the straight line connecting the two points of east and √2 degrees longitude,
| X | + | y | = √2
It is expressed.

Assuming approximately 100 km per longitude and approximately 110 km per latitude, the area enclosed by the straight line (| x | + | y | ≦ √2) includes a circle of approximately 100 km centered on the current position. To do. Therefore,
| X | + | y | ≦ √2
| X | ≦ 1, | y | ≦ 1
The range of approximately 100 km from the current position is covered by this range.

  (12) The control unit 1-6 obtains the difference between the latitude and longitude of each extracted mountain and the latitude and longitude of the current position, sets the east-west direction distance as the X-axis and the north-south direction distance as the Y-axis, The position of each mountain is expressed in the coordinate system of the first quadrant. Note that the distance per degree of latitude is about 111 km, and the radius of the circle that goes around the surface of the latitude y degree around the earth axis is cos (y) times the radius of the earth. The distance of the surface of the earth per longitude in is 111 × cos (y) km. Using this relationship, the position coordinates of each mountain are calculated from the latitude and longitude.

Each mountain in the extracted view range is selected one by one, and the following processes (13) to (26) are performed on each selected mountain.
(13) The control unit 1-6 determines a direction from the current position with respect to one selected analysis target mountain. When the direction is θ _mt and the coordinate position of the mountain is (X _mt , Y _mt ), it is expressed as tan θ _mt = Y _mt / X _mt and the direction θ _m is obtained.

(14) The control unit 1-6 inquires of the altitude storage unit 1-72 about the definition of the grid of the map data.
(15) The elevation storage unit 1-72 notifies the control unit 1-6 of the definition of the grid.
(16) In accordance with the definition of the grid, the control unit 1-6 determines the length of one side of the grid, the coordinates of the current position of the mobile terminal (origin), and the coordinates of one corner (for example, the upper right corner) of the grid to which the current position belongs. Find the deviation.

Assuming a coordinate system in which the current position of the mobile terminal is the origin of coordinates, the east-west direction distance is the X axis, the east is the + direction, the north-south direction distance is the Y axis, and the north is the + direction, the length of one side of the grid is d And A shift between the current position (origin) and the grid (the coordinates of one corner (for example, the upper right corner) of the grid to which the current position belongs) is defined as (α, β). The partition line (boundary line) of the lattice is expressed by the following equation.
North-south dividing line that divides the X-axis (east-west direction): X = d × n + α (n is an integer)
East-west lane marking that divides the Y-axis (north-south direction): Y = d × m + β (m is an integer)

(17) The control unit 1-6 calculates the coordinates of the direct connection line connecting the current position and the top of the mountain to be analyzed, and the dividing line and intersection of each grid. If the coordinates of the peak of the analysis target are (X _mt , Y _mt ), and the angle between the direct connection line on the XY plane connecting the current position and the peak and the X axis is θ _mt ,
tanθ _mt = Y _mt / X _mt
The direct connection line on the XY plane connecting the current position and the top of the mountain is
Y = (tan θ _mt ) X
It is expressed.

Next, the intersection of the direct connection line on the XY plane connecting the current position and the top of the mountain and the partition line of the lattice is calculated. Intersection of the separation lines of the north-south direction, becomes point of intersection between the separation line between the north-south direction between 0 and X _mt, by extracting the range of n values of d × n + alpha is a value from 0 to X _mt That's fine. A lattice including the coordinate point (d × n + α, (tan θ _mt ) × (d × n + α)) into which n is substituted is extracted.

On the other hand, the intersection of the division line of the east-west direction is made 0 and the intersection between the separation line between the east-west direction until Y _mt, the range of m values of d × m + beta is a value between 0 and Y _mt Extract it. A lattice including a coordinate point ((d × m + β) / (tan θ _mt ), d × m + β) into which m is substituted is extracted.

  FIG. 4 shows an example of the arrangement relationship between the grid and the direct connection line connecting the peak of the analysis target and the current position. In the example of FIG. 4, the direct connection line 4-3 connecting the top of the mountain 4-1 to be analyzed and the current position 4-2 is the above-described n value of 1 and 2, and m value of 1 to 21. The example which crosses the division line of a grating | lattice is shown.

(18) Next, the control unit 1-6 instructs the altitude sensor 1-4 to measure the altitude at the current position.
(19) The altitude sensor 1-4 measures the altitude at the current position and notifies the control unit 1-6 of the measurement result. The altitude can be calculated based on the value of the GPS sensor 1-3 or the measured value of the atmospheric pressure sensor.
(20) The control unit 1-6 acquires the altitude (elevation) value of the current position.

(21) The control unit 1-6 obtains the altitude of each grid of the direct connection line connecting the current position in the three-dimensional space and the peak of the mountain to be analyzed. If the current position is the origin, the coordinates of the peak of the mountain are (X _mt , Y _mt , Z _mt ), and the elevation angle is θ _mt-v ,
tan θ _mt−v = Z _mt / √ {(X _mt ) ² + (Y _mt ) ² }
It becomes.

The Z-axis component (elevation) of the direct connection line connecting the current position and the top is
Z = (tan θ _mt−v ) × √ (X ² + Y ² )
It is expressed. Where Y = (tan θ _mt ) X
It is.

Intersection coordinates (d × n + α, (tan θ _mt ) × (d × n + α)) and ((d × m + β) / () of the straight line of the XY plane connecting the current position and the top and the partition line of the lattice tan θ _mt ), d × m + β)
Is substituted for the above-mentioned X and Y, the elevation for each grid of the direct connection line connecting the current position and the top is obtained.

(22) The control unit 1-6 instructs the altitude storage unit 1-72 to read the altitude of the ground surface of each grid through which the direct connection line connecting the current position and the top passes.
(23) The altitude storage unit 1-72 notifies the control unit 1-6 of the altitude of the ground surface of the grid.
(24) The control unit 1-6 compares the altitude of the direct connection line connecting the current position and the top for each lattice with the altitude of the ground surface.

  (25) The control unit 1-6 views the summit from the current position when the altitude of each grid of the direct connection line connecting the current position and the summit is higher than the altitude of the ground surface directly below it. Is determined to be possible. The judgment result, if the view is possible, the name of the mountain, the altitude of each grid of the direct connection line, the altitude of the ground surface of the grid directly below the direct connection line, and the height of the peak of the mountain The confirmation information storage unit 1-74 is instructed to store.

  FIG. 5 shows an example of the direct connection line connecting the current position and the top and the altitude of the ground surface of each grid immediately below. FIG. 5 shows an example of the altitude of the ground surface of each grid from the direct connection line in FIG. 4 and the grid 1-1 to the grid 2-21 directly below. In FIG. 5, the lattice 1-1 to 1-11 and the lattice 2-11 to 2-21 are in contact with each other at a partition line of Y = d × m + β, and the lattice 1-11 and the lattice 2-11 are X = d × It touches with the lane marking of n + α.

The coordinates (d × n + α, (tan θ _mt ) × (d × n + α)), ((d × x) of the straight line on the XY plane connecting the current position and the top and the partition line of each lattice For each grid including (m + β) / (tan θ _mt ), d × m + β), the altitude of the ground surface of each grid is obtained by reading the altitude data from the altitude storage unit 1-72.

Here, the Z-axis component (elevation) of the direct connection line connecting the current position and the top is
It is obtained by substituting the coordinates of each lattice into (X, Y) in the equation of Z = (tan θ _mt−v ) × √ (X ² + Y ² ). The altitude of the direct connection line is compared with the altitude of the ground surface for each grid, and if the altitude of the direct connection line is high in all grids, the top can be viewed from the current position. In that case, it is possible to add a configuration for further calculating how much the top is viewed.

  In the calculation, the ratio of the altitude of the ground surface to the altitude of each grid of the direct connection line connecting the current position and the top is calculated. Then, the altitude of the grid having the largest ratio is extracted, and the ratio is expressed by, for example,%. The ratio is a ratio that blocks the view, and that ratio is hidden in the foreground mountain. Therefore, the remaining ratio obtained by subtracting the ratio from the total ratio (100%) is the ratio of the top portion that can be viewed.

The percentage of the top portion that can be viewed can be displayed to the user, for example, in%, or the percentage can be converted to meters and displayed to the user. In addition, a distance √ (X ′ ² + Y ′ ² ) to the coordinates (X ′, Y ′ 2) of the grid that most blocks the view to the top is calculated, and for the mountain standing at the position of the distance, It is possible to display to the user that the entire mountain of the analysis target is not visible.

(26) The control unit 1-6 instructs the view confirmation information storage unit 1-74 to store view confirmation data including the name, direction, distance, and the like of the mountain to be analyzed for the above-described view. The view confirmation information storage unit 1-74 stores the name, azimuth and distance, height, and view availability data of the view target mountain designated by the control unit 1-6. These view confirmation data are accumulated, for example, in 32 directions obtained by equally dividing 360 degrees into 32 directions and stored as shown in Table 1 below, for example.

  (27) After finishing the calculation for the mountains in all directions, the control unit 1-6 confirms the direction of the view desired by the user. For example, as shown in FIG. Notify the user to turn the screen of the mobile terminal. Then, the geomagnetic sensor 1-5 is instructed to measure in which direction the mobile terminal is directed.

(28) The geomagnetic sensor 1-5 measures the direction in which the mobile terminal is facing and notifies the control unit 1-6.
(29) Based on the direction information notified from the geomagnetic sensor 1-5, the control unit 1-6 instructs the output unit 1-2 to inquire whether the user can view the mountains in the direction.
(30) The output unit 1-2 notifies the user of the direction in which the mobile terminal is facing, for example, as shown in FIG. When the notified direction is the desired view direction, the user operates the OK button, and the operation input is notified to the input unit 1-1.

  (31) If the user desires a view in a different direction, the mobile terminal is directed in a different direction. When the mobile terminal detects that the direction has been moved by the geomagnetic sensor 1-5, the mobile terminal prompts the user to point the mobile terminal at the mountains that the user wants to view, for example, as shown in FIG. In this case, the operation returns to the operation (28) described above.

  The direction notified on the screen of the mobile terminal is the viewing direction desired by the user. When an OK button operation is input by the user, for example, as shown in FIG. Information (name, elevation, distance, etc.) is displayed. When the mobile terminal is tilted, the user is notified so that the user wishes to reconfirm the desired viewing direction.

(33) The user inputs a display request for the ratio (height) of the top portion that can be viewed.
(34) When the display request is accepted by the input unit 1-1, the control unit 1-6 is notified of the display request.
(35) In the control unit 1-6, the view confirmation information storage unit 1-74 has a name, an altitude, a viewability, and a ratio of the peak portion that can be viewed (high) for each mountain in the direction in which the screen of the mobile terminal is facing. A).
(36) The view confirmation information storage unit 1-74 notifies the control unit 1-6 of such information.

(37) The control unit 1-6 requests the output unit 1-2 to display the information.
(38) The output unit 1-2 displays such information. For example, as shown in FIG. 7B, the height of the top portion that can be viewed on the screen of the mobile terminal is displayed together with the design and the like. Further, when a plurality of mountains can be viewed in the same direction (about ± 6 degrees), for example, as shown in FIG.

  Further, when a plurality of mountains overlap and are viewed in the same direction, for example, as illustrated in FIG. Further, for a mountain that cannot be seen due to being blocked, for example, as shown in FIG.

Examples of usage scenes of portable terminals that can display this view information include:
(1) Display the name of the mountains and the height of the view from the place where the view of the mountains is open.
(2) Display the name of the mountains and the height of the view from the high buildings and the houses with a good view.
(3) Display the name of the mountains and the height of the view from the top of the lake or the sea
(4) Display the name of the mountains and the height of the guests, etc., which can be viewed from a room where you can see the scenic mountains.
An example is given as an example.

  When the mobile terminal reaches a place where a beautiful mountain range or the like can be seen, the display of the view information notifies the user of information on the mountains seen from the place in real time. Therefore, the user of the mobile terminal can accurately grasp the mountains that can be viewed, can not only fully enjoy the scenery of the mountains and deepen the impression, but also avoid getting lost in climbing etc. It can also be used to prevent distress.

1-1 Input unit 1-2 Output unit 1-3 GPS sensor 1-4 Altitude sensor 1-5 Geomagnetic sensor 1-6 Control unit 1-7 Memory 1-71 Range storage unit 1-72 Altitude storage unit 1-73 View Target information storage unit 1-74 View confirmation information storage unit 1-8 Radio unit 1-9 Baseband signal processing unit 1-10 Power supply

Claims (5)

An altitude storage unit for storing the altitude of the ground surface for each grid of the map separated by a grid of parcels along the direction of each of the latitude line and the longitude line;
A view target information storage unit for storing data of the name, position and altitude of the view confirmation target;
A current position detection sensor for detecting the latitude, longitude and altitude of the current position;
Read the position and elevation of the view confirmation target from the view target information storage unit, obtain each grid directly below the direct connection line connecting the current position detected by the current position detection sensor and the top of the view confirmation target, for each grid The altitude of the direct connection line is calculated, the altitude of the direct connection line is compared with the altitude of the ground surface read from the altitude storage unit for each grid, and the altitude of the direct connection line is higher than the altitude of the ground surface in all of the grids. A control unit that determines that the view confirmation target is viewable,
An output unit that outputs a view confirmation information including a view confirmation target name read out from the view target information storage unit and a view confirmation target name determined by the control unit;
Mobile terminal equipped with. A range storage unit for storing distance information is provided.
The control unit, based on the data of the position of each view confirmation target stored in the view target information storage unit, the view confirmation target existing in the range from the current position to the distance stored in the range storage unit, The portable terminal according to claim 1, which is a confirmation target. A view that accumulates view confirmation data including the result of the view confirmation of the view confirmation target determined by the control unit, the view confirmation target name, altitude, and azimuth for each predetermined angle centered on the current position. A confirmation information storage unit;
A geomagnetic sensor for detecting a direction in which the screen is facing;
With
The control unit inquires the view confirmation information storage unit for view confirmation data in a direction detected by the geomagnetic sensor, and instructs the output unit to display the view confirmation information in the direction. The portable terminal according to claim 1 or 2.   The control unit calculates the ratio of the altitude of the ground surface to the altitude of the direct connection line for each of the grids, and based on the value with the largest ratio, the ratio of the peak portion of the view confirmation target or the height thereof 4 is calculated, and the ratio or height of the viewable top portion is stored in the view confirmation information storage unit and displayed on the output unit. The mobile terminal according to Crab. Storing the altitude of the ground surface for each grid of the map separated by a grid of lane markings along the direction of each of the latitude line and the longitude line in advance in the elevation storage unit;
A step of preliminarily storing the name, position and altitude data of the view confirmation target in the view target information storage unit;
Detecting the latitude, longitude and altitude of the current position by a current position detection sensor;
Read the position and elevation of the view confirmation target from the view target information storage unit, obtain each grid directly below the direct connection line connecting the current position detected by the current position detection sensor and the top of the view confirmation target, for each grid The altitude of the direct connection line is calculated, the altitude of the direct connection line is compared with the altitude of the ground surface read from the altitude storage unit for each grid, and the altitude of the direct connection line is higher than the altitude of the ground surface in all of the grids. A step of determining that the view confirmation target is viewable,
Controlling to display on the screen the view confirmation information including the result of the determination of view availability and the name of the view confirmation target read from the view target information storage unit;
A view information display method characterized by including:

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