KR101973173B1 - Map service server, system for providing map service, and method thereof - Google Patents

Abstract

The present invention relates to a map service server, to a map service system, and to a map service method. According to the present invention, the map service server comprises: a map storage unit storing map data; a variable scale storage unit storing scale information with respect to the latitude variable in accordance with the latitude corresponding to a projection method generating the map data; a scale generating unit generating a graphic scale for each latitude on the basis of the scale information for each latitude corresponding to the latitude of the map data requested from an external user terminal; and a service providing unit providing the map data and the graphic scale to the user terminal. Thus, by providing the graphic scale reflecting the distortion of a distance by projection in a map generation process, the user can perform an analysis based on accurate scale information per latitude.

Description

MAP SERVICE SERVER, METHOD FOR PROVIDING MAP SERVICE, AND METHOD THEREOF,

The present invention relates to a map service server, a map service system, and a map service method, and more particularly, to a server, system, and map service method for providing a map service including a graphic scale for map scale display .

Many web and mobile map services are available. Since the map represents the actual distance in a reduced ratio, when the map service is provided, the information about the scale, which is the ratio of reducing the actual distance on the map to the map, is provided. The information about the scale can be expressed in text form as a fraction or a ratio, but a graphic scale is widely used as another expression form.

FIG. 1 shows an example in which scale information is provided using a graphic scale on a map according to the prior art. Referring to FIG. 1, a graphic scale in the form of a ruler is displayed at the bottom left of the map. Thus, according to the conventional map service, information on the scale is provided by utilizing a graphic scale in the form of a bar or a ruler on one side of the map.

However, since the earth takes a sphere shape, a projection process is basically performed when a map of a two-dimensional plane shape is generated. There are various known projection techniques including Mercator's projection technique. When a three-dimensional shape is generated in a two-dimensional shape by applying the projection technique in this way, it is inevitable that a size or shape Deformation occurs in the characteristic. Due to this, the scales differ according to the latitude. For example, according to Web Mercator's projection, one of the projection techniques, the distance and area of expression on the map tend to be widened as compared to the actual distance or area, which is the same as in the case of low latitude.

According to this, as shown in Fig. 1, one graphic scale provided according to the prior art does not reflect accurate distance scale at various latitudes. As a result, when referring to the graphic scale provided in accordance with the prior art and knowing the distances at various latitudes, this leads to erroneous results.

Therefore, it is required to provide a graphic scale reflecting distance distortion by projection so that the user can grasp the map based on accurate scale information.

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Japanese Patent No. 2784913 (May 29, 1998)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional art, and it is an object of the present invention to provide a map service server and system for providing a map service including a graphic scale in which a distance distortion due to latitude generated in a map generation process by projection is reflected And a method thereof.

According to an aspect of the present invention, there is provided a map service server, comprising: a map storage unit for storing map data; A variable scale storage unit for storing scale information pertaining to the latitude in accordance with latitude corresponding to the projection method that generated the map data; A scale generator for generating a graphic scale for each latitude on the basis of the scale information for each latitude corresponding to the latitude of the map data requested from an external user terminal; And a service providing unit for providing the map data and the graphic scale to the user terminal.

At this time, the service providing unit may insert a plurality of the graphic scales generated for each latitude included in the requested map data at a position on the latitude of the map data corresponding to the graphic scale.

Here, the scale information per latitude may be generated on the basis of a predetermined two-point distance between two points on the same latitude and a distance on the map.

Meanwhile, the scale generator may determine the number of graphic scales generated for each latitude according to a latitude range of the map data requested from the user terminal.

According to another aspect of the present invention, there is provided a map service system comprising: a map service server storing map data and scale information according to latitude in accordance with a projection method that generates the map data; And requesting map data from the map service server to receive the map data corresponding to the request and the scale information for each latitude, generating a graphic scale for each latitude based on the scale information for each latitude, And a user terminal for displaying the data and the graphic scale on a display unit.

At this time, the user terminal can generate the graphic scale based on the scale information pertaining to the latitude corresponding to the latitude of the map data where the cursor displayed on the display unit is located.

The user terminal may also update with the graphical scale corresponding to the latitude adjacent to the cursor in response to the movement of the cursor position.

The user terminal may utilize the cursor as the graphic scale, and the graphic scale may be configured to include two segments perpendicular to each other.

In addition, the graphic scale may include a square of a predetermined unit size centered at an intersection of the two line segments.

According to another aspect of the present invention, there is provided a map service method for providing a map service in response to a request from a user terminal, the map service method comprising: Storing scale-dependent scale information according to latitude; The map service server receiving a request for map data from a user terminal; Generating a graphic scale for each latitude on the basis of the latitude-dependent scale information corresponding to the latitude of the map data requested by the user terminal from the map service server; And the map service server providing the map data and the graphic scale to the user terminal.

In addition, the above object is also achieved by a map service method for providing a map service in response to a request of a user terminal according to another aspect of the present invention, the map service method comprising the steps of: Storing scale-dependent scale information according to latitude; The map service server receiving a request for map data from a user terminal; Receiving, by the user terminal, map data corresponding to the request from the map service server and the scale information for each latitude; Generating a graphic scale for each latitude on the basis of the scale information for each latitude received by the user terminal; And displaying the map data and the graphic scale by the user terminal.

As described above, according to the present invention, it is possible to provide a graphic scale reflecting a distance distortion due to projection in a map generation process, thereby enabling a user to perform an analysis based on accurate scale information for each latitude.

In addition, according to the present invention, convenience of the user can be improved by providing a convenient GUI based on an accurate graphic scale.

FIG. 1 illustrates an example in which scale information is provided using a graphic scale on a map according to the prior art;
FIG. 2 is a block diagram showing a configuration of a map service system according to a first embodiment of the present invention; FIG.
3 is a block diagram illustrating a configuration of a map service server according to the map service system of FIG. 2;
4 is a reference diagram for explaining scale information by latitude;
5 is a diagram showing an example provided by adding a graphic scale generated for each latitude to map data;
6 is a block diagram showing a configuration of a map service system according to a second embodiment of the present invention;
Figures 7 and 8 illustrate examples of forms of graphic scales;
9 is a flowchart illustrating a map service method according to the first embodiment of the present invention; And
10 is a flowchart illustrating a map service method according to a second embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

2 is a configuration diagram showing a configuration of a map service system according to the first embodiment of the present invention. Referring to FIG. 2, the map service system 1 according to the first embodiment of the present invention includes a map service server 100 and a user terminal 200.

The map service server 100 stores map data and scale information by latitude and provides a map service using the stored data. Here, the map data is data generated by a projection method of projecting a three-dimensional spherical earth in a two-dimensional plane, and can be generated by various known projection methods for generating a map including a Mercator projection method.

On the other hand, the principle of creating a map by applying the projection technique is inevitably deformed in the characteristics such as the size and the shape of the region, and the scale is different according to the latitude. As described above, according to the Web Mercator projection technique, the expression distance and area on the map tend to be further enlarged as compared to the actual distance or area, which is the same as that of the low latitude, toward the high latitude. The scale information by latitude means the scale information which varies in accordance with the latitude by the map generation by projection as described above.

The user terminal 200 is a terminal possessed by a user who is provided with a map service from the map service server 100. The user terminal 200 may be a mobile terminal, a tablet PC, a desktop, An input means for receiving input from a user through a touch screen, a display means for displaying various images or text information related to the map service, and a communication module for communicating with the map service server 100. The communication between the map service server 100 and the user terminal 200 can be performed by various wireless or wired methods such as Wi-Fi, Bluetooth, and LTE.

When the user terminal 200 requests the map service server 100 for a map of a specific area based on user input, the map service server 100 transmits map data according to the request of the user terminal 200 And the user terminal 200 displays the map data transmitted from the map service server 100 on the display.

3 is a block diagram showing a configuration of the map service server 100 according to the embodiment of FIG. Hereinafter, the detailed configuration of the map service server 100 will be described with reference to FIG.

3, a map service server 100 according to an embodiment of the present invention includes a map storage unit 110, a variable scale storage unit 120, a scale generation unit 130, and a service provider 140 .

The map storage unit 110 stores map data for a map service target area. Since a method of generating a map by various projection methods is known, a detailed description of the method of generating map data will be omitted for the sake of simplicity. Map data can be stored in various structures according to the service operation. For example, when a tile-based map service is provided, tile-based map data in which map data of an object area is divided into a plurality of tiles may be stored. At this time, a plurality of hierarchical structures corresponding to different scales I have.

The variable-scale storage unit 120 stores scale-dependent scale information according to latitude. At this time, according to the specific projection method of generating the map data, the different scale may be different according to the latitude, so the scale information for each latitude can be stored according to each projection type.

FIG. 4 is a reference diagram for explaining the scale information by latitude, and shows a scale in which the scale is varied according to the latitude, according to the Web Mercator projection method which is one of the projection methods.

Referring to FIG. 4, it can be seen how long the same 1000 km distance on the map is represented by the latitude, the latitude, and the altitude on the geographical coordinates indicated by the altitude on the average sea level have.

The same distance on the geodesic coordinates should be represented by the same distance on the map. However, as shown in FIG. 4, the distance of 1000 km from the relatively low latitude 20 degrees to the high latitude increases gradually on the map It can be confirmed that it is expressed long. As described above, when the map is generated by projection, the scale is displayed differently according to the latitude.

The variable scale storage unit 120 stores scale information that varies depending on the latitude, that is, variable scale information in which the ratio between the expression distance represented on the map and the geodesic distance corresponding to the expression distance varies according to latitude. Since the variable scale storage unit 120 has difficulty in storing all of the scale information according to the consecutive latitudes, it is possible to store the scale information for each latitude varying at a predetermined latency interval, for example, every 1 degree, in the form of a data table. At this time, it goes without saying that the latitude interval can be changed according to the setting.

On the other hand, the scale information by latitude can be generated on the basis of the map representation distance of how much the distance between the two predetermined points on the same latitude is represented on the map. As a reference, the Great circle distance is the distance measured between the two points on the Earth's surface, assuming that the Earth is a sphere. Using the Haversine formula and other algorithms known for measuring the distance .

The scale generation unit 130 receives a request for map data for a predetermined area from the user terminal 200 through a communication module (not shown), and transmits the requested map information among the scale information for each latitude stored in the variable scale storage unit 120 A graphic scale is generated for each latitude based on the latitude-specific scale information corresponding to the latitude of the data. For example, if the user terminal 200 requests map data for an area from a latitude of 20 degrees to a latitude of 30 degrees, the scale generator 130 generates scale information corresponding to latitude 20 degrees and latitude 30 degrees Based on the scale information corresponding to the latitude 20 and latitude 30 degrees, respectively.

Here, if the generated graphic scale can display information on the ratio of the expression distance on the map to the geodesic distance, various forms of graphic shapes such as a bar bar shape and a scale shape can be utilized, and the shape is not limited to a specific shape.

Meanwhile, the scale generator 130 may determine a specific number of graphic scales generated for each latitude according to the latitude range of the map data requested from the user terminal 200. For example, when the user terminal 200 requests map data for an area ranging from 20 degrees latitude to 21 degrees latitude, there is no large change in the scale so that the user can visually recognize at 1 degree latitude or cause a large error in distance determination Only one graphics scale can be created. At this time, the graphic scale may interpolate using the scale information by the latitude corresponding to the latitude 20 and 21 degrees, or by using the scale information corresponding to the latitude 20 degrees and the scale value corresponding to the latitude 21 degrees, You will be able to create a graphic scale based on the scale.

On the other hand, when the requested map data is data for an area from latitude of 20 degrees to latitude of 70 degrees, the range of the data is wide and the change of the scale according to the latitude is large, so that a plurality of graphic scales can be generated. For example, a total of six graphic scales may be generated by generating intervals of 10 degrees in latitude. In this way, the scale generator 130 stores in advance a criterion for determining the number of graphic scales to be generated according to the latitude range and the latency interval included in the requested map data, and determines the appropriate number of graphic scales based on the criteria .

The service providing unit 140 transmits the map data requested by the user terminal 200 and the generated graphic scale to the user terminal 200. At this time, the service providing unit 140 may provide the map data with the generated graphic scale added thereto. For example, the service providing unit 140 inserts a plurality of graphic scales generated for each latitude into a latitude position corresponding to the corresponding graphic scale in the map data so that the user can easily grasp the graphic scale corresponding to the latitude .

FIG. 5 shows an example in which a graphic scale generated for each latitude is added to map data.

5, five graphic scales (S1 to S5) generated at intervals of 10 degrees of latitude in the map data of latitude of 20 degrees to latitude of 60 degrees are arranged at the end of the corresponding upper graphical screen . Although FIG. 5 shows an example in which a graphic scale is generated at intervals of 10 degrees in latitude, a latitude interval at which a graphic scale is generated, such as being disposed at intervals of 5 degrees, can be determined in a fluid manner. However, it is desirable that a plurality of graphic scales should not cause inconvenience in hindering visibility of the user or grasping the map data, so that the appropriate number is preferably arranged according to the latitude range included in the map data.

If the service provider 140 transmits the map data and the graphic scale to the user terminal 200 without the service provider 140 directly adding the graphic scale to the map data, When displaying the data on the display, it may also be processed to display the graphic scale together. For example, the user terminal 200 may superimpose the graphic scale on the map data in the form as shown in FIG. To this end, the user terminal 200 may include a processor for performing processing for superimposing and displaying a plurality of latitude graphic scales at each latitude position of the map data.

In addition, when the user views the map data at the user terminal 200, only a part of the plurality of graphic scales may be displayed according to the setting or selection of the user so that the graphic scale does not interfere with the field of view. For example, only the graphical scale corresponding to the latitude selected by the user may be displayed, or, if the cursor of the user terminal 200 is located near the latitude of 20 degrees, You can also automatically select the graphic scale to be displayed, such as hiding the graphical scale of the latitude.

As described above, according to the map service system 1 according to the embodiment of the present invention, by providing a graphical scale for each latitude in which different scales are reflected according to latitude, the user can recognize a distance or an area based on accurate scale information can do.

6 is a block diagram showing the configuration of the map service system 2 according to the second embodiment of the present invention. Referring to FIG. 6, the map service system 2 according to the second embodiment of the present invention also includes a map service server 300 and a user terminal 400. Hereinafter, the contents overlapping with the above-described embodiment will be omitted for the sake of simplicity of explanation, and differences will be mainly described.

According to the first embodiment described above, if the graphic scale generated by the scale generation unit 130 of the map service server 100 through its own processing based on the scale information for each latitude is served together with the map data, In the example, the map service server 300 transmits the map data together with the scale information pertaining to the latitude included in the requested map data together with the map data at the request of the user terminal 400, and performs processing of the user terminal 400 There is a difference in that it creates a graphic scale.

Referring to FIG. 6, the map service server 300 includes a map storage unit 310, a variable scale storage unit 320, and a service provider 330.

Here, the map storage unit 310 and the variable scale storage unit 320 store scale data for each latitude, which varies according to the latitude and the map data, respectively.

The service providing unit 330 receives the request of the user terminal 400 and transmits the requested map data and the scale information of the latitude included in the requested map data to the user terminal 400.

The user terminal 400 includes an application for generating a graphic scale and performing processing for providing the graphic scale together with the map data in order to serve the graphic scale together with the data transmitted from the map service server 300 .

The user terminal 400 includes a user input unit 410, a display unit 420, and a scale generator 430, as shown in FIG.

The user input unit 410 is for receiving a user input. The user inputs an input for requesting map data to the map service server 300 through an input module such as a keyboard, a mouse, a keypad, a touch screen, Various inputs can be performed.

The display unit 420 displays various screens for the map service including the map data received from the map service server 300 and the graphic scale generated through the scale generator 430 as described later.

The scale generator 430 generates a graphic scale corresponding to the latitude of the map data based on the received scale information per latitude and controls the display mode of the generated graphic scale. At this time, the number of graphic scales generated according to the latitude range included in the map data can be determined flexibly, and the shape of the graphic scale is not limited to a specific form such as a bar bar, a graduation shape, and the like.

5, the scale generation unit 430 may control the display unit 420 to display a plurality of graphic scales generated for each latitude in a state of being inserted in a latitude position corresponding to the corresponding graphic scale have.

Alternatively, it is possible to control not to simultaneously display the graphic scale corresponding to each latitude on the display unit 420, but to display only one graphic scale corresponding to the position of the cursor displayed on the display unit 420 for the user's input have. For example, as shown in FIG. 5, not all of the five graphic scales may be displayed, but only a graphic scale corresponding to the latitude closest to the cursor position may be generated and displayed.

The scale generator 430 will continuously update the graphic scale displayed on the display unit 420 based on the scale information per latitude in response to the change in the position of the cursor. For example, if the position of the cursor is near 20 degrees latitude, control is made so that the graphic scale corresponding to latitude 20 degrees is displayed, and when the position of the cursor is moved near latitude 40 degrees, the graphic scale corresponding to latitude 40 degrees is displayed. At this time, the position of the graphic scale may be located at the end of the screen where the latitude close to the position of the cursor is located as shown in FIG. 5, or the graphic scale may follow the position of the cursor by utilizing the cursor as a graphic scale .

Figures 7 and 8 are diagrams illustrating the shape of the graphic scale.

7 and 8, an example of utilizing a cursor displayed on the display unit 420 of the user terminal 400 as a graphic scale is as follows. In FIG. 7 and FIG. 8, (Sa, Sb), which are perpendicular to each other.

In FIG. 7, the graphical scale S has an 'C' shape, and FIG. 8 shows an example having a four-sided shape including four quadrants. 7 and 8, the graphic scale S may include a square Sc of a predetermined unit size centered on an intersection O at which two line segments Sa and Sb meet . The above square (Sc) can help the user to easily grasp the unit scale. For example, in Figs. 7 and 8, the main scale is displayed in units of 0.5 km and 0.5 km, and distances of smaller units such as 0.1 km are difficult to grasp. For example, a square having a size of 0.1 km X 0.1 km is added around the intersection O to perform a kind of small scale function so that a user can easily measure a distance smaller than 0.5 km. At this time, the size of the square Sc will change correspondingly to the scale change of the graphic scale S.

7 and 8 illustrate examples of the shape of the graphic scale S, it is also possible to use a single bar shape composed of one line segment of two line segments Sa and Sb instead of two line segments Sa and Sb perpendicular to each other And the like can be taken in various forms.

As shown in FIGS. 7 and 8, the cursor may be used as a graphic scale so that the graphic scale follows the movement of the cursor by the user's operation. At this time, the position of the cursor on the map So that the graphic scale is updated with the graphic scale corresponding to the latitude close to the position of the cursor based on the scale information per latitude. By doing this, the user can quickly and accurately grasp the distance, the area, and the like by using the graphic scale corresponding to the latitude in the vicinity of the position, simply by moving the cursor to the map area that the user is viewing.

FIG. 9 is a flowchart showing a map service method according to the first embodiment of the present invention, and shows each step performed according to a map service method through the map service system 1 of FIG.

Referring to FIG. 9, it is assumed that the map service server 100 stores map data and scale information by latitude (S10). As described above, the map data storage format can be determined according to the service operation method. The scale information by latitude may be generated on the basis of a predetermined distance between the two points on the same latitude and a representation distance on the map, and the map data may be stored by predetermined latitude intervals according to the type of the specific projection method. Respectively.

Then, when the map service server 100 receives a request relating to the map data from the user terminal 200, the map service server 100 transmits the scale information per latitude corresponding to the latitude of the map data requested from the user terminal 200 To generate a graphic scale (S11, S13).

The map service server 100 provides the generated graphic scale together with the map data to the user terminal 200 (S15). The user terminal 200 displays the map data and the graphic scale received from the map service server 100. At this time, the map service server 100 transmits the graphic scale inserted into the map data to the user terminal 200, and the user terminal 200 performs only display processing in the form received from the map service server 100 Alternatively, when the map service server 100 transmits the map data and the graphic scale, the user terminal 200 may be configured to superimpose and display the graphic scale at the corresponding position of the map data. 7 and 8, when the graphic scale is superimposed on the map through the processing of the user terminal 200, the user terminal 200 uses the cursor as a graphic scale, It goes without saying that the scale may be displayed to follow. According to this, among the plurality of graphic scales, the cursor will be changed to a graphic scale corresponding to the adjacent latitude in accordance with the movement of the cursor.

FIG. 10 is a flowchart illustrating a map service method according to a second embodiment of the present invention, and shows each step performed according to the map service method through the map service system 2 of FIG.

Referring to FIG. 10, it is presupposed that the map service server 300 stores map data and scale information by latitude, similarly to the first embodiment (S30).

Then, when the map service server 300 receives a request relating to the map data from the user terminal 400, the map service server 300 responds to the request and stores the map data and the scale corresponding to the latitude included in the map data Information to the user terminal 400 (S31, S33).

The user terminal 400 generates a graphic scale for each latitude based on the scale information for each latitude received from the map service server 300, and displays the map data and the graphic scale together on the display unit 420 (S35 , S37). At this time, as shown in FIG. 5, the graphic scale may be positioned at the end of the screen where the latitude close to the position of the cursor is located, or the graphic scale may follow the position of the cursor by utilizing the cursor as a graphic scale It is also possible to display it as described above.

As described above, according to the map service server, the map service system, and the map service method according to the present invention, by providing the graphic scale for each latitude in consideration of the distance distortion caused by projection in the map generation process, Enables analysis based on scale information.

Meanwhile, the map service method according to the present invention may be implemented as a program that can be executed by a computer, and may be implemented as a variety of recording media such as a magnetic storage medium, an optical reading medium, and a digital storage medium.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations may be implemented in a computer program product, such as an information carrier, e.g., a machine readable storage device, such as a computer readable storage medium, for example, for processing by a data processing apparatus, May be embodied as a computer program recorded on a device (computer readable medium). A computer program, such as the computer program (s) described above, may be written in any form of programming language, including compiled or interpreted languages, and may be stored as a stand-alone program or in a module, component, subroutine, As other units suitable for use in the present invention. A computer program may be deployed to be processed on one computer or multiple computers at one site or distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing a computer program include, by way of example, both general purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The elements of a computer may include at least one processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer may include one or more mass storage devices for storing data, such as magnetic, magneto-optical disks, or optical disks, or may receive data from them, transmit data to them, . ≪ / RTI > Information carriers suitable for embodying computer program instructions and data include, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory A magneto-optical medium such as a floppy disk, an optical disk such as a DVD (Digital Video Disk), a ROM (Read Only Memory), a RAM , Random Access Memory), a flash memory, an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and the like. The processor and memory may be supplemented or included by special purpose logic circuitry.

In addition, the computer-readable medium can be any available media that can be accessed by a computer, and can include computer storage media.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various device components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and devices will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100, 300: map service server 110, 310:
120, 320: Variable scale storage unit 130: Scale generation unit
140, 330 service providing unit 200, 400 user terminal
410: user input unit 420: display unit
430: Scale generating unit

Claims (11)

A map storage unit for storing map data;
A variable scale storage unit for storing scale information for each latitude in which the ratio between the expression distance represented on the map and the geodesic distance corresponding to the expression distance corresponds to the latitude corresponding to the projection method that generated the map data;
A scale generator for generating a graphic scale for each latitude based on the latitude information corresponding to the latitude of the map data requested from an external user terminal; And
And a service providing unit for providing the map data and the graphic scale to the user terminal.
The method according to claim 1,
The service providing unit,
Wherein the map service server inserts a plurality of the graphic scales generated for each latitude included in the requested map data at a position on the latitude of the map data corresponding to the graphic scale.
The method according to claim 1,
Wherein the scale information for each latitude is generated on the basis of a distance between two predetermined points on the same latitude and a distance on the map.
The method according to claim 1,
Wherein the scale generator comprises:
And determines the number of graphic scales generated for each latitude according to a latitude range of the map data requested from the user terminal.
A map service server for storing scale information for each latitude in which the ratio between the expression distance represented on the map and the geodesic distance corresponding to the expression distance corresponds to latitude corresponding to the map data and the projection method in which the map data is generated; And
Requests map data to the map service server to receive the map data corresponding to the request and the scale information for each latitude, generates a graphic scale for each latitude based on the scale information for each latitude, And a user terminal for displaying the data and the graphic scale on a display unit.
6. The method of claim 5,
Wherein the user terminal generates the graphic scale based on the scale information for each latitude corresponding to the latitude of the map data on which the cursor displayed on the display unit is located.
The method according to claim 6,
Wherein the user terminal updates with the graphic scale corresponding to a latitude adjacent to the cursor corresponding to the movement of the cursor position.
The method according to claim 6,
Wherein the user terminal utilizes the cursor as the graphic scale, wherein the graphic scale includes two line segments perpendicular to each other.
9. The method of claim 8,
Wherein the graphic scale includes a square of a predetermined unit size centered on an intersection of the two line segments.
A map service method for providing a map service in response to a request from a user terminal,
The ratio between the expression distance represented on the map and the geodesic distance corresponding to the expression distance corresponding to the projection method in which the map service server generates the map data and the map data varies depending on the latitude Storing scale information by latitude;
The map service server receiving a request for map data from a user terminal;
Generating a graphic scale for each latitude on the basis of the scale information for each latitude corresponding to the latitude of the map data requested from the user terminal; And
And the map service server providing the map data and the graphic scale to the user terminal.
Storing scale information for each latitude in which the ratio between the expression distance represented on the map and the geodesic distance corresponding to the expression distance corresponds to the projection method in which the map service server generates the map data and the map data;
The map service server receiving a request for map data from a user terminal;
Receiving, by the user terminal, map data corresponding to the request from the map service server and the scale information for each latitude;
Generating a graphic scale for each latitude based on the scale information for each latitude received by the user terminal; And
Wherein the user terminal displays the map data and the graphic scale.

Images