JP3464982B2 - Map data providing method, recording medium on which the program is recorded, program, and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map data providing method, a recording medium having the program recorded therein, a program having the program recorded therein, and an apparatus having the program recorded therein, for improving convenience when using a plurality of map databases.

[0002]

2. Description of the Related Art Conventionally, a map database that supplies map data has been used to display an electronic map. Since the map database is managed by a unique coordinate system and scale system, a map viewer for displaying a map on the terminal also uses a map viewer corresponding to the map database.

On the other hand, in recent years, map data has become diversified, and the need to use a plurality of map databases has increased. For example, if a plurality of various map databases are used for urban design and road design, the design efficiency can be significantly improved.

[0004]

However, in the past, it was not possible to use a plurality of map databases with a common coordinate system and scale system, and therefore, in a terminal, a plurality of map databases can be used with a single map viewer. It was difficult to use the map database of. To solve this,
Although it is technically possible to change the map database so that it can be used at a common coordinate and scale, this requires a great deal of labor and time.

Further, in the past, the user of the terminal is
Since it was not possible to know the available map database in advance, there was a possibility of requesting a search for an unavailable map database.

Therefore, the present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a map data providing method for improving convenience when using a plurality of map databases, It is to provide a recording medium in which the program is recorded, the program, and the device.

[0007] Further, it is preferable to provide a map data providing method capable of knowing a map database capable of searching map data in advance, a recording medium having the program recorded therein, the program and an apparatus therefor. To do.

[0008]

In order to solve the above-mentioned conventional problems, a map data providing method according to claim 1 of the present invention comprises an arbitrary terminal capable of displaying a map based on drawing data and a plurality of map databases. A map data providing method performed by a map data providing device connected to a
A map control management table setting procedure for setting a map control management table by associating a plurality of map controls for transmitting a search request for each of the plurality of map databases with each of the plurality of map databases; A scale management table setting procedure for setting a scale management table by associating a plurality of global scale parameters in a common scale system and a plurality of local scale parameters in each scale system of the plurality of map databases with each other, and the terminal And a display result table setting procedure for setting the display result table by associating the global scale parameter corresponding to the map data transmitted to the terminal and displayed on the terminal with the coordinate value in the global coordinate system, and displaying on the terminal. The map data When a search request corresponding to map data desired to be switched is transmitted from the terminal, a map control corresponding to the map data desired to be switched to the search request, the global scale parameter, and coordinates in the global coordinate system. A coordinate conversion procedure for converting the coordinate value of the global coordinate system into the coordinate value of the coordinate system in the map database corresponding to the map control specified by the search request when a value is specified; The scale parameter conversion procedure for converting the global scale parameter in the above into a local scale parameter in the specified map database by referring to the scale management table, and the coordinate value and the local scale parameter of the converted coordinate system, The corresponding map device is specified via the map control specified in the search request. A switching procedure for requesting a search for map data desired to be switched by transmitting the map data searched by the map database to the terminal and switching the map data displayed on the terminal. It is characterized by having.

In the map data providing method according to claim 2 of the present invention, when the global scale parameter and the coordinate value in the global coordinate system corresponding to the map data desired to be switched are not specified in the search request, The coordinate conversion procedure is a procedure for converting the coordinate value of the global coordinate system in the display result management table into the coordinate value of the coordinate system in the map database corresponding to the map control specified by the search request. The scale parameter conversion procedure is a procedure for converting the global scale parameter in the display result management table into a local scale parameter in the map database corresponding to the designated map control with reference to the scale management table. Characterize.

A recording medium according to claim 3 of the present invention is a map executed by a map data providing device which is connected via communication lines to an arbitrary terminal capable of displaying a map by map data and a plurality of map databases. A recording medium storing a data providing program, wherein map control management for setting a map control management table by associating a plurality of map controls for transmitting a search request for each of the plurality of map databases with each of the plurality of map databases Scale management by correlating a table setting procedure, a plurality of global scale parameters in a common scale system unique to the map data providing device, and a plurality of local scale parameters in each scale system of the plurality of map databases with each other. Scale management table setting procedure to set the table and before A display result table setting procedure for setting a display result table by associating the global scale parameter corresponding to the map data transmitted to the terminal and displayed on the terminal and the coordinate value in the global coordinate system; When a search request corresponding to map data desired to be switched from the displayed map data is transmitted from the terminal, a map control corresponding to the map data desired to be switched to the search request, the global scale parameter, and Coordinates for converting the coordinate value of the global coordinate system to the coordinate value of the coordinate system in the map database corresponding to the map control designated by the search request when the coordinate value in the global coordinate system is designated. The conversion procedure and the global scale parameter in the search request are set to the scale management table. The scale parameter conversion procedure for converting to the local scale parameter in the specified map database with reference to the map, the coordinate value of the converted coordinate system and the local scale parameter, and the map control specified in the search request. Through the corresponding map database to request the search of the map data desired to be switched, the map data searched by the map database is transmitted to the terminal, and the map data displayed on the terminal is displayed. And a switching procedure for switching.

In the recording medium according to a fourth aspect of the present invention, the global scale parameter corresponding to the map data desired to be switched and the coordinate value in the global coordinate system are not designated in the search request, The coordinate conversion procedure is a procedure for converting the coordinate value of the global coordinate system in the display result management table into the coordinate value of the coordinate system in the map database corresponding to the map control specified by the search request, The parameter conversion procedure is a procedure for converting a global scale parameter in the display result management table into a local scale parameter in the designated map database with reference to the scale management table.

A map data providing program according to a fifth aspect of the present invention is executed by a map data providing apparatus which is connected to an arbitrary terminal capable of displaying a map by map data and a plurality of map databases via a communication line. And a map control management table setting procedure for setting a map control management table by associating a plurality of map controls for transmitting a search request for each of the plurality of map databases with each of the plurality of map databases. , A scale management table is set by associating a plurality of global scale parameters in a common scale system unique to the map data providing device with a plurality of local scale parameters in each scale system of the plurality of map databases. Scale management table setting procedure and the end And a display result table setting procedure for setting the display result table by associating the global scale parameter corresponding to the map data transmitted to the terminal and displayed on the terminal with the coordinate value in the global coordinate system, and displaying on the terminal. When a search request corresponding to the map data desired to be switched from the map data being displayed is transmitted from the terminal, the map control corresponding to the map data desired to be switched to the search request, the global scale parameter and the Coordinate conversion for converting the coordinate value of the global coordinate system to the coordinate value of the coordinate system in the map database corresponding to the map control specified in the search request when the coordinate value in the global coordinate system is specified. The procedure and the global scale parameter in the search request are stored in the scale management table. By referring to the scale parameter conversion procedure for converting to the local scale parameter in the specified map database, and the coordinate value and the local scale parameter of the converted coordinate system, via the map control specified in the search request. Switching to switch to switch map data displayed on the terminal by transmitting to the corresponding map database, requesting search for map data desired to be switched, transmitting map data searched by the map database to the terminal Procedure and
It is characterized by including.

In the map data providing program according to claim 6, when the search request does not specify a global scale parameter and a coordinate value in the global coordinate system corresponding to the map data desired to be switched, the coordinates are coordinated. The conversion procedure is a procedure for converting the coordinate value of the global coordinate system in the display result management table into the coordinate value of the coordinate system in the map database corresponding to the map control specified by the search request, and the scale parameter. The conversion procedure is a procedure for converting the global scale parameter in the display result management table into a local scale parameter in the designated map database by referring to the scale management table.

A map data providing apparatus according to a seventh aspect is a map data providing apparatus which is connected to an arbitrary terminal capable of displaying a map by map data and a plurality of map databases via a communication line. Map control management table in which a plurality of map controls for transmitting a search request to each of the map databases are set in association with each of the plurality of map databases, and a plurality of common scale systems unique to the map data providing device are provided. A scale management table set by associating a plurality of local scale parameters in the scale system of each of the plurality of map databases with each other,
A display result table in which global scale parameters corresponding to map data transmitted to the terminal and displayed on the terminal and coordinate values in the global coordinate system are set in association with each other, and displayed on the terminal. When a search request corresponding to map data desired to be switched from map data is transmitted from the terminal, a map control corresponding to the map data desired to be switched to the search request, the global scale parameter, and the global coordinate system. A coordinate value in the coordinate system in the coordinate system in the map database corresponding to the map control specified in the search request, the coordinate conversion means for converting the coordinate value in the global coordinate system, Specify the global scale parameter in the search request by referring to the scale management table. A scale parameter conversion means for converting the local scale parameters in the map databases,
The coordinate values of the converted coordinate system and the local scale parameter are transmitted to the corresponding map database via the map control designated by the search request to request the search of the map data desired to be switched, and the map The map data searched by the database is transmitted to the terminal, and the switching switching means for switching the map data displayed on the terminal is provided.

In the map data providing device according to claim 8,
In the search request, when the global scale parameter corresponding to the map data desired to be switched and the coordinate value in the global coordinate system are not designated, the coordinate conversion means is configured to convert the global coordinate system in the display result management table. Is a means for converting the coordinate value of the coordinate value of the coordinate system in the map database corresponding to the map control specified by the search request, wherein the scale parameter conversion means converts the global scale parameter in the display result management table. , A means for converting into a local scale parameter in the designated map database with reference to the scale management table.

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration and a connection form of a map data providing device 1 according to an embodiment of the present invention.

The map data providing device 1 is an arbitrary terminal used by a map viewer (one of which is shown as a terminal 2).
To a communication line (not shown). The terminal 2 is equipped with a map viewer (hereinafter referred to as an application program) 21 that displays a map based on map data. The map data providing device 1 is connected to a plurality of map databases (hereinafter referred to as map DB) 3 via a communication network (Internet or the like). 3 for each map DB3
They are distinguished as A, 3B, 3C, .... Further, in the map data providing device 1, a map control 31 which is a program for making a search request to each map DB 3 is provided.
It is provided for each.

For convenience, each map control 31 is set to 31.
They are distinguished as A, 31B, 31C, .... In addition, the names of the map DBs 3A, 3B, 3C, ... Are changed to A_MAP, B_.
MAP, C_MAP, ... and each map control 31
The name of A_MAP_CON, B_MAP_CON,
C_MAP_CON, ... In the present specification, the alphabet indicates the correspondence.

The map data providing device 1 includes a map database switching unit 11, a map information conversion unit 12, a map control wrapper unit 13, a map information management unit 14, a map information management table 15, and a map control search unit 1.
6 and a map control management table 17. The map information management table 15 is the coordinate system management table 15.
1, a scale management table 152 and a display result management table 153. Although the display result management tables 153 are provided for the number of terminals, only those corresponding to the terminals 2 are shown in FIG.

The map database switching unit 11, the map information conversion unit 12, the map control wrapper unit 13, the map information management unit 14, and the map control search unit 16 read the map data providing program of the present invention from a storage device (hard disk device or the like). Is executed by the central processing unit of the map data providing device 1.

The map information conversion unit 12 serves as coordinate conversion means, the map information management unit 14 serves as scale parameter conversion means, and
The scale management table 152 is stored in the scale parameter storage means.
The display result management table 153 corresponds to a display parameter storage unit. Map database switching unit 1
1, the map information conversion unit 12 and the map control wrapper unit 13 constitute map data providing means.

The map control wrappers 13 are provided in the number corresponding to each map DB 3. For the sake of convenience, each map control wrapper unit 13 is set to 13A, 13B, 1
3C, ... are distinguished. It should be noted that this alphabet corresponds to the alphabet of the map DB 3 and the map control 31.

Before explaining the components of the map data providing apparatus 1, the work procedure and each table 17, 15 in the preparation stage
The setting of values to 1,152,153 will be described.

FIG. 2 is a flow chart showing the work in the preparation stage. FIG. 3 is a diagram showing the coordinate system management table 151. FIG. 4 is a diagram showing the scale management table 152. FIG. 5 is a diagram showing the display result management table 153. FIG. 6 is a diagram showing the map control management table 17.

In step S1, the coordinate system management table 1
51 is set. As shown in FIG. 3, each map DB name A
_MAP, B_MAP, C_MAP, ... and the corresponding coordinate system name “National Coordinate System 9” used in the map DB3.
"Latitude and longitude", "national coordinate system 10", ... Are set.
Further, “latitude / longitude” is set as a name of a common coordinate system that is unique in the map data providing device 1.

In step S2, the scale management table 15
2 is set.

Here, the global scale parameter and the local scale parameter used in the map data providing apparatus 1 will be described. The global scale parameter is a scale parameter in a common scale system that is unique within the map data providing apparatus 1, and its value is 1 to 5. The local scale parameter is a scale parameter in the scale system of each map DB3. As shown in FIG. 4, for example, in the map DB 3A (A_MAP), 1/25,
When the scale of 000 is expressed as "34000", "34
000 ”is 1/2 in the map DB3 (A_MAP)
It is called a local scale parameter that represents a scale of 5,000. Also, the local scale parameter is the map DB3C.
As in the case of (C_MAP), it may be a character string such as "wide area 1", "wide area 2", "wide area 3", "detail 1", "detail 2".

In step S2, the local scale parameter of each map DB3 is set in association with one of the global scale parameters "1", ..., "5".

In step S3, the display result management table 153 is set. As described above, in the map data providing device 1, “latitude / longitude” is used as a common coordinate system. As shown in FIG. 5, specified values of latitude and longitude (for example, latitude and longitude of the position of Tokyo station) are set. The set latitude and longitude are the coordinate values of the display point (for example, the center point) included in the display range on the terminal 2, and are also referred to as display coordinate values. Further, in step S3, for example, "3" is set as the specified value of the global scale parameter. As described above, in the map data providing device 1, the specified values are stored in advance in the display result management table 153, and the display coordinate values and the global scale parameter are updated to the latest values when the map data is transmitted. There is.

In step S4, the map control management table 17 is set. As shown in FIG. 6, in the map control management table 17, the map control names A_MAP_CON, B_MAP_CON, corresponding to each map DB 3 used by the map data providing apparatus 1, are stored.
C_MAP_CON, ... Is set. Note that this set value is maintained even if any of the map controls 31 is unavailable. It should be noted that steps S1 to S4 are fixed.

The components of the map data providing device 1 will be described in detail with reference to FIG. Map database switching unit 11
Is a search condition (specifically, a map control name, a map control name, a map display request, or a map display change request made by the application program 21 of the terminal 2.
The coordinate value and the global scale parameter or only the map control name) is output to the map information conversion unit 12, and the search result (specifically, map data) input from the map information conversion unit 12 is transmitted to the terminal 2.

Further, the map database switching unit 11 is
When the map data providing device 1 is started, the map control search unit 16 notifies the map control 31 of validity or invalidity, and therefore only the valid map control name is transmitted to the terminal 2.

When the search condition is input from the map database switching unit 11, the map information conversion unit 12 obtains the map information set in the map information management table 15 by an inquiry to the map information management unit 14 and further coordinates. After conversion, the map control wrapper unit 13 is requested to search for map data. Further, the map information conversion unit 12 outputs the map data from the map control wrapper unit 13 to the map database switching unit 11. Further, the map information management unit 14 is requested to update the display result management table 153. In addition, in response to a request from the map control search unit 16, the valid / invalid result is obtained from each map control 31 and output to the map control search unit 16.

For example, the map control wrapper unit 13
May issue a command to determine whether the map control 31 is valid or invalid, thereby obtaining binary information indicating success or failure, and valid / invalid may be determined by this. You may make a request and determine that the map data is valid when it is obtained, and invalid when a failure code is returned.

When a map data search request is issued from the map information conversion section 12, each map control wrapper section 13 sends a corresponding map control 31 (for example, the map control wrapper section 13A has a map control 31A).
In step (1), a search request for map data is requested, the searched map data is acquired and output to the map information conversion unit 12. On this occasion,
In order to eliminate the heterogeneity due to the difference in the interface,
API (Applicatio) provided by each map control 31
n Search request and result acquisition according to (Program Interface).

The map information management unit 14 includes the map information conversion unit 1
When the map control 31 is designated from 2 and there is an inquiry, the name of the corresponding coordinate system is read from the coordinate system management table 151, and from the scale management table 152,
The local scale parameter corresponding to the designated map control 31 is read out, and the display result management table 1
The display coordinate values are read from 53 and are output to the map information conversion unit 12. Further, when the global scale parameter and the display coordinate value are input in the update request of the display result management table 153 from the map information conversion unit 12, these are associated with the terminal and the display result management table 1 is displayed.
Store in 53.

The map control retrieval unit 16 reads the map control name from the map control management table 17 when the map data providing apparatus 1 is activated, and the map information conversion unit 12 polls the entire map control wrapper unit 13. Request each map control 31
For, get its valid / invalid result. Then, this result is output to the map database switching unit 11.

Next, the operation of the map data providing device 1 will be described.

FIG. 7 is a flowchart showing a process performed by the map data providing device 1 in response to a search request from a terminal that is not displaying a map.

For example, when there is a usage request from the terminal 2 that uses the map data providing device 1 for the first time, the map control search unit 16 reads all the map control names in the map control management table 17 in step S11. Map control name A_MAP_CON, B_MAP_C
It is assumed that ON, C_MAP_CON, ... Are read.

In step S12, the map control search unit 16 first sets the read map control name to
Notify the map information conversion unit 12, and the map information conversion unit 12
Corresponding map control wrapper unit 13 (13A, 1
3B, 13C, ...), and outputs a polling instruction to each map control. The map control wrapper units 13A, 13B, 13C, ... Have corresponding map controls A_MAP_CON, B_MAP_CON, C_M.
Poll for AP_CON, ... here,
It is assumed that there is an invalid response from the map control 31D (corresponding to D_MAP_CON). Each map control wrapper unit 13 notifies the map information conversion unit 12 of the validity / invalidity of the corresponding map control, and the map information conversion unit 12 excludes the content notified from each map control wrapper unit 13, that is, D_MAP_CON. The map control name is notified to the map control search unit 16.

In step S13, the map control search section 16 notifies the map database switching section 11 of the notified map control name.

In step S14, the map database switching unit 11 sends the notified map control name to the terminal 2.

At step S15, the application program 21 notifies the notified map control name A_M.
AP_CON, B_MAP_CON, ... (D_MAP_
A list of map DB names corresponding to (except CON) is displayed.
Note that D_MAP_CON cannot be used in the map DB3
May be displayed as corresponding to.

Here, it is assumed that one of the map DBs 3 (for example, A_MAP) is selected by the user's operation.

In step S16, the application program 21 requests the map data providing device 1 to search the map data by the map control A_MAP_CON.

By the way, at this time, since the map data has not yet been transmitted to the terminal 2, the display coordinate value and the global scale parameter are not transmitted from the terminal 2,
Only the map control name is sent.

In step S17, the map database switching unit 11 of the map data providing apparatus 1 outputs the map control name A_MAP_CON to the map information conversion unit 12.

In step S18, the map information conversion unit 12
First, the map information management unit 14 is inquired about the display coordinate value (the specified value at this point). In addition, the map information management unit 14
Is inquired about the name of the coordinate system corresponding to the map DB name A_MAP. Further, the map information management unit 14 is inquired about the local scale parameter of the map control wrapper unit 13A corresponding to the global scale parameter (the specified value "3" at this point) set in the display result management table 153.

In step S19, the map information management unit 14
However, from the display result management table 153, the specified values of the display coordinate values, that is, the latitude “32562029” and the longitude “128616678” are displayed.
Also, the name of the coordinate system corresponding to the map DB name A_MAP "national coordinate system 9" is read from the coordinate system management table 1
51, the local scale parameter “17000” of the map control wrapper unit 13A corresponding to the global scale parameter “3” is read from the scale management table 152, and these are read.
Output to. Note that step S19 corresponds to the scale parameter conversion procedure.

In step S20, the map information conversion unit 12
Makes a search request to the map control wrapper unit 13A. At that time, the map information conversion unit 12 determines that the latitude is “32562”.
029 "and longitude" 128616678 "are coordinate values (f (128616678), F (32
562029)) and outputs the converted coordinate value and the local scale parameter "17000" to the map control wrapper unit 13A. Where the function f
It is assumed that (x) converts the longitude into one coordinate value in the national coordinate system 9 and the function F (y) converts latitude into the other coordinate value in the national coordinate system 9. Note that step S20 corresponds to the coordinate conversion procedure.

In step S21, the map control wrapper unit 13A requests the corresponding map DB 3A to search for map data via the corresponding map control 31A. Specifically, the map control wrapper unit 13A
However, the coordinate value f (12861
6678) and F (32562029)) and the local scale parameter "17000", the map control 31A sends the given data to the map DB 3A.

In step S22, the map DB 3A transmits the map data retrieved based on the transmitted data to the map control 31A, and the map control wrapper unit 1
3A acquires this and outputs it to the map information conversion part 12.

In step S23, first, the map information conversion unit 1
2 outputs the input map data to the map database switching unit 11, and the map database switching unit 11 transmits this to the terminal 2. As a result, the transmitted map data is displayed by the application program 21. Note that steps S22 and S23 are
It corresponds to the map data provision procedure.

After step S23, the map data providing device 1 finishes the process.

FIG. 8 is a flow chart showing a process performed by the map data providing device 1 in response to a search request from a terminal displaying a map.

For example, in step S31, the application program 21 causes the map control names A_MAP_CON and B_MAP_ notified in advance in step S14.
For example, the map control name C_MAP_CON is selected from CON, C_MAP_CON, ... According to the operation of the user who desires to switch the map, and the global scale parameter “3” and the latitude “325620” are selected.
00 ”and longitude“ 128616000 ”.

In step S32, the application program 21 requests the map data providing apparatus 1 to search for map data by the map control name A_MAP_CON. At this time, from the terminal 2, the display point (for example, Tokyo station)
And the global scale parameter "3" are also transmitted.

In step S33, the map database switching unit 11 of the map data providing apparatus 1 outputs the map control name C_MAP_CON, latitude and longitude, and global scale parameter "3" to the map information conversion unit 12.

In step S34, the map information conversion unit 12
First, the map information management unit 14 is inquired about the name of the coordinate system corresponding to the transmitted map DB name C_MAP. Further, the map information management unit 14 is inquired about the local scale parameter of the map control wrapper unit 13C corresponding to the transmitted global scale parameter “3”.

In step S35, the map information management unit 14
Reads the name of the coordinate system "national coordinate system 10" corresponding to the map DB name C_MAP, and the map control wrapper unit 1 corresponding to the global scale parameter "3".
Read the local scale parameter "Wide area 3" of 3C,
These are output to the map information conversion unit 12. Note that step S35 corresponds to the scale parameter conversion procedure.

In step S36, the map information conversion unit 12
Makes a search request to the map control wrapper unit 13C. Specifically, the latitude "32562000" and the longitude "128616000" are coordinate values (g (32562000), G (12861600) in the national coordinate system 10.
0)), and the converted coordinate values and the local scale parameter “wide area 3” are output to the map control wrapper unit 13C. Here, it is assumed that the function g (x) converts the longitude into the coordinate value in the national coordinate system 10 and the function G (y) converts the latitude into the coordinate value in the national coordinate system 10. Note that step S36 corresponds to the coordinate conversion procedure.

In step S37, the map control wrapper section 13C causes the corresponding map control C_MA.
The corresponding map DB 3C is requested to search for map data via P_CON.

In step S38, the map DB 3C sends the searched map data to the map control 31C,
The map control wrapper unit 13C acquires this and outputs it to the map information conversion unit 12.

In step S39, first, the map information conversion unit 1
2 outputs the input map data to the map database switching unit 11, and the map database switching unit 11 transmits this to the terminal 2. As a result, the transmitted map data is displayed by the application program 21. Note that steps S38 and S39 are
It corresponds to the map data provision procedure.

If the process in step S39 is not normally performed, the map data providing apparatus 1 finishes the process, but if it is normal, the process proceeds to step S40.

In step S40, the map information conversion unit 12
Specifies the terminal 2 that is the transmission destination of the map data and requests the map information management unit 14 to update the display result management table 153. That is, the latitude “32562000” and the longitude “128616000” and the global scale parameter “3” input to the map information conversion unit 12 in step S33 are requested to be written in the display result management table 153.

In step S41, the map information management unit 14
The written latitude and longitude and the global scale parameter are written (updated) in the display result management table 153 corresponding to the terminal 2.

Then, step S39 or step S
After 41, the map data providing device 1 ends the process.

When the map data providing apparatus 1 requests the map data again from the terminal 2 and the latitude and longitude and the global scale parameter are not transmitted at that time, the display result management table updated in step S41. 1
Search the map data using the value of 53.

As described above, according to the map data providing apparatus 1 according to the present embodiment, the coordinate value in the predetermined coordinate system transmitted at the time of the map data search request from the terminal is used as the search request. Converted to coordinate values in the map database specified in, convert the scale parameter in the predetermined scale system transmitted at the time of the search request to the scale parameter in the specified map database,
Since the map data searched by the specified map database is acquired based on the converted coordinate values and scale parameters and transmitted to the terminal that has made the change request, the terminal uses these predetermined coordinate systems. Also, the map data can be obtained from the map DB by the coordinate value and the scale parameter in the scale system, and as a result, the convenience when using a plurality of map databases is improved. Also, multiple map databases can be used from a single map viewer.

When the coordinates and the scale parameter are not transmitted, the coordinate values and the specified values of the scale parameter stored in advance are used. Therefore, for example, even when the initial search is performed, the map data Can be provided.

Further, the transmitted coordinate value and scale parameter are stored, and if the coordinate and scale parameter are not transmitted at the time of a search request, the stored coordinate value and scale parameter are used. Therefore, the map data retrieved in the previous retrieval can be provided to the terminal. Therefore, it is not necessary to save the previous map data in the terminal.

Since the scale parameter conversion is performed using the scale management table 152, the scale parameter can be converted without using a function or the like for converting the scale parameter.

Further, since the map database which can be searched for the map data is detected in advance and the detected map database is displayed on the terminal as a list, the process of inquiring from the terminal one by one is not required, and the user of the terminal can also do it. Convenience increases.

The program executed by the map data providing apparatus 1 for performing the above-described processing corresponds to the map data providing apparatus, and includes semiconductor memory, magnetic disk, optical disk, magneto-optical disk, magnetic tape, etc. Can be recorded on a computer-readable recording medium of
It can be widely distributed by being transmitted via a communication network such as the Internet.

[0090]

As described above, according to the present invention,
Convert the coordinate values in the predetermined coordinate system to the coordinate values in the map database, convert the scale parameters in the predetermined scale system to the scale parameters in the map database, and then convert the coordinate values and scale parameters. Thus, the map data retrieved by the map database is acquired and transmitted to the terminal, which improves convenience when using a plurality of map databases. Also, multiple map databases can be used from a single map viewer.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration and a connection form of a map data providing device 1 according to an embodiment of the present invention.

FIG. 2 is a flowchart showing work in a preparation stage.

FIG. 3 is a diagram showing a coordinate system management table 151.

FIG. 4 is a diagram showing a scale management table 152.

FIG. 5 is a diagram showing a display result management table 153.

FIG. 6 is a diagram showing a map control management table 17.

FIG. 7 is a flowchart showing a process performed by the map data providing device 1 in response to a search request from a terminal that is not displaying a map.

FIG. 8 is a flowchart showing a process performed by the map data providing device 1 in response to a search request from a terminal displaying a map.

[Explanation of symbols]

1 Map data providing device 2 Terminal 3 (3A, 3B, ...) Map database 11 Map database switching unit 12 Map information conversion unit 13 (13A, 13B, ...) Map control wrapper unit 14 Map information management unit 15 Map information management table 151 Coordinate system management table 152 Scale management table 153 Display result management table 16 Map control search unit 17 Map control management table 31 (31A, 31B, ...) Map control

Front page continuation (72) Inventor Ryuji Hoshi 2-3-1, Otemachi, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (56) Reference JP 2000-20678 (JP, A) JP 2000-339330 ( JP, A) JP 2000-267563 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09B 29/00 G06F 17/30 110 G06F 17/30 170 G06T 11/60 300

Claims (8)

(57) [Claims] 1. A map data providing method performed by a map data providing apparatus, which is connected to an arbitrary terminal capable of displaying a map by map data and a plurality of map databases through a communication line, wherein: A map control management table setting procedure for setting a map control management table by associating a plurality of map controls for transmitting a search request for each with a plurality of map databases, and a common scale system unique to the map data providing device. A scale management table setting procedure for setting a scale management table by associating a plurality of global scale parameters with each other and a plurality of local scale parameters in each scale system of each of the plurality of map databases with each other, and transmitting the scale management table to the terminal. Corresponds to the map data displayed on the terminal A display result table setting procedure for setting a display result table by associating global scale parameters and coordinate values in the global coordinate system, and a search request corresponding to map data desired to be switched from the map data displayed on the terminal. Is transmitted from the terminal, when the map control corresponding to the map data desired to be switched, the global scale parameter, and the coordinate value in the global coordinate system are designated in the search request, the global A coordinate conversion procedure for converting the coordinate value of the coordinate system into the coordinate value of the coordinate system in the map database corresponding to the map control specified by the search request, and the global scale parameter in the search request by the scale management table. Refer to the local scale pattern in the specified map database. A scale parameter conversion procedure for converting to a meter, the coordinate value of the converted coordinate system and the local scale parameter are transmitted to the corresponding map database via the map control specified by the search request, and the switching is desired. A map data providing method, which requests a search for map data, transmits the map data searched by the map database to the terminal, and switches the map data displayed on the terminal. Method. 2. When the search request does not specify a global scale parameter corresponding to the map data desired to be switched and a coordinate value in the global coordinate system, the coordinate conversion procedure includes the display result management table. Is a procedure for converting the coordinate values of the global coordinate system in to the coordinate values of the coordinate system in the map database corresponding to the map control specified by the search request, and the scale parameter conversion procedure is the display result management table. 2. The map data providing method according to claim 1, which is a procedure for converting the global scale parameter in the above step into a local scale parameter in the map database corresponding to the designated map control by referring to the scale management table. . 3. A recording medium in which a map data providing program executed by a map data providing device connected to a terminal capable of displaying a map by map data and a plurality of map databases via a communication line is recorded. And a map control management table setting procedure for setting a map control management table by associating a plurality of map controls for transmitting a search request for each of the plurality of map databases with each of the plurality of map databases, and the map data providing device. A scale management table setting procedure for setting a scale management table by associating a plurality of global scale parameters in a common scale system unique to each other with a plurality of local scale parameters in each scale system of the plurality of map databases, and , Sent to the terminal and displayed on the terminal A display result table setting procedure for setting a display result table by associating the global scale parameter corresponding to the map data shown and the coordinate values in the global coordinate system, and switching from the map data displayed on the terminal. When the search request corresponding to the desired map data is transmitted from the terminal, the map control corresponding to the map data desired to be switched to the search request, the global scale parameter, and the coordinate value in the global coordinate system are A coordinate conversion procedure for converting the coordinate value of the global coordinate system to the coordinate value of the coordinate system in the map database corresponding to the map control specified in the search request, if specified; Set the scale parameter to the specified area by referring to the scale management table. A scale parameter conversion procedure for converting to a local scale parameter in the database, and the coordinate value of the converted coordinate system and the local scale parameter are transmitted to the corresponding map database via the map control specified in the search request. Requesting a search for map data desired to be switched, transmitting map data searched by the map database to the terminal, and a switching procedure for switching the map data displayed on the terminal. A recording medium on which a map data providing program is recorded, characterized in that the program is recorded. 4. When the search request does not specify a global scale parameter corresponding to the map data desired to be switched and a coordinate value in the global coordinate system, the coordinate conversion procedure includes the display result management table. Is a procedure for converting the coordinate values of the global coordinate system in to the coordinate values of the coordinate system in the map database corresponding to the map control specified by the search request, and the scale parameter conversion procedure is the display result management table. 4. The map data providing program according to claim 3, which is a procedure for converting the global scale parameter in the above into a local scale parameter in the designated map database with reference to the scale management table. Medium. 5. A map data providing program executed by a map data providing device, which is connected to an arbitrary terminal capable of displaying a map by map data and a plurality of map databases via a communication line, wherein: A map control management table setting procedure of setting a map control management table by associating a plurality of map controls for transmitting a search request for each map database with each of the plurality of map databases, and a common common map data providing device. A scale management table setting procedure for setting a scale management table by associating a plurality of global scale parameters in a scale system and a plurality of local scale parameters in each scale system of the plurality of map databases with each other, and for the terminal Map data sent and displayed on the terminal Display result table setting procedure for setting the display result table by associating the global scale parameter corresponding to the data and the coordinate value in the global coordinate system, and the map data displayed on the terminal to the map data desired to be switched. When a corresponding search request is sent from the terminal, a map control corresponding to the map data desired to be switched, the global scale parameter, and the coordinate value in the global coordinate system are specified in the search request. In the coordinate conversion procedure of converting the coordinate value of the global coordinate system to the coordinate value of the coordinate system in the map database corresponding to the map control specified in the search request, and the global scale parameter in the search request, By referring to the scale management table, the map in the specified map database A scale parameter conversion procedure for converting into a cull scale parameter, the coordinate values of the converted coordinate system and the local scale parameter are transmitted to the corresponding map database via the map control specified by the search request, and the switching is performed. A map requesting a search for desired map data, transmitting the map data searched by the map database to the terminal, and switching the map data displayed on the terminal. Data provision program. 6. In the search request, when the global scale parameter corresponding to the map data desired to be switched and the coordinate value in the global coordinate system are not designated, the coordinate conversion procedure includes the display result management table. Is a procedure for converting the coordinate values of the global coordinate system in to the coordinate values of the coordinate system in the map database corresponding to the map control specified by the search request, and the scale parameter conversion procedure is the display result management table. 6. The map data providing program according to claim 5, which is a procedure for converting the global scale parameter in the above step into a local scale parameter in the designated map database by referring to the scale management table. 7. A map data providing device, which is connected to an arbitrary terminal capable of displaying a map by map data and a plurality of map databases via a communication line, for transmitting a search request to each of the plurality of map databases. A map control management table that is set by associating a plurality of map controls with each of the plurality of map databases, a plurality of global scale parameters in a common scale system that is unique in the map data providing device, and the plurality of maps. A scale management table in which a plurality of local scale parameters in each scale system of each database are associated with each other, a global scale parameter corresponding to map data transmitted to the terminal and displayed on the terminal, and A table set by associating the coordinate values in the global coordinate system When a search request corresponding to the display result table and the map data desired to be switched from the map data displayed on the terminal is transmitted from the terminal, the search request corresponds to the map data desired to be switched. When the map control, the global scale parameter, and the coordinate value in the global coordinate system are designated, the coordinate value in the global coordinate system is set in the map database corresponding to the map control designated in the search request. Coordinate conversion means for converting the coordinate values of the system, global scale parameter in the search request, scale parameter conversion means for converting the local scale parameter in the specified map database with reference to the scale management table, The coordinate values of the transformed coordinate system and the local scale parameter are The map data sent to the corresponding map database via the map control specified in the request is requested to search the map data desired to be switched, and the map data searched by the map database is sent to the terminal, A map data providing device, comprising: a switching switching unit for switching the map data displayed on. 8. When the search request does not specify a global scale parameter corresponding to the map data desired to be switched and a coordinate value in the global coordinate system, the coordinate conversion unit causes the display result management table to be displayed. In the map database corresponding to the map control specified by the search request, the scale parameter converting means is a means for converting the coordinate value of the global coordinate system in the display result management table. 8. The map data providing device according to claim 7, which is a means for converting the global scale parameter in the above into a local scale parameter in the designated map database by referring to the scale management table.