JP5061872B2 - Map data utilization device, program for map data utilization device, and data for external storage medium - Google Patents

Description

  The present invention relates to a map data utilization device, a program for a map data utilization device, and data for an external storage medium.

  2. Description of the Related Art Conventionally, navigation apparatuses that perform map display, route guidance, and the like using map data recorded on a replaceable external storage medium (for example, map DVD media, map CD media, etc.) have been widely used. Among such navigation apparatuses, there is a navigation apparatus that acquires a program for using map data from a connected external storage medium.

  An example of the operation of such a navigation device is shown using the flowchart of FIG. In this example, when there is no application on its own RAM (step 210), the navigation apparatus reads the application from the currently inserted map DVD onto the RAM (step 230).

  Even if there is an application on its own RAM, if the version of the application in the currently inserted map DVD is newer than the version of the application on the RAM (step 220), the application in the RAM is in the map DVD. (Step 230). Therefore, for example, when the latest version of the map DVD is inserted into the navigation device for the first time, the latest application is read from the map DVD into the RAM.

  However, according to the operation of this navigation device, if the version of the application on its own RAM is the same as or newer than the version of the application in the currently inserted map DVD, the application from the map DVD is used. Is not read (step 220 → NO).

  Therefore, when the latest version of the map DVD is taken out and the old version of the map DVD is inserted, the latest version of the application in the RAM remains retained. The map data that can be used with the old version of the map DVD inserted is the old version of the map data.

  At this time, the latest version of the application may not be compatible with the old version of the map data. For example, if the latest version of the application uses new voice data included only in the latest version of map data, the navigation device requests such voice data for the old version of map data. In addition, an error or the like may occur.

  The above problems are common to not only navigation devices but also all devices (for example, map display devices) that acquire map data and applications from replaceable external storage media.

  SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to reduce the possibility that an application to be used will not be compatible with map data used in an apparatus that acquires map data and applications from a replaceable external storage medium.

  In order to achieve the above object, the invention described in claim 1 includes an internal storage medium (16), a processing circuit (18) for executing an application recorded in the internal storage medium, and an externally connected externally connected device. The present invention relates to a map data utilization device comprising a reading device (15) for reading data in a storage medium. As an external storage medium connected to the reading device in a replaceable manner, a first external storage medium (20) in which the first map data and a first application for using the first map data are recorded together. ) And a second external storage medium (21) in which a second map data and a second application for using the second map data are recorded together.

  Here, the “connected external storage device” refers to an external storage device that is set in a readable state by the reading device. For example, an inserted disk, a connected USB memory, and a wirelessly connected wireless LAN storage medium correspond to an example of “connected external storage device”.

In such a map data utilization device, the processing circuit reads the first external storage medium connected to the reading device in the past into the internal storage medium, and currently holds the first in the internal storage medium. First confirmation means (135) for confirming the version of the application, and second confirmation means (140) for confirming the version of the second map data recorded in the second external storage medium currently connected to the reading device. And determination means for determining whether the version of the first application matches the version of the second map data on the basis of the matching correspondence data indicating the version of the application that matches the version of the second map data (145, 150) and the determination result of the determination means is negative, and shall be used instead of the first application. , And a second application and changing means for reading the internal storage medium (155) recorded in the second external storage medium.

  As described above, the map data utilization device determines whether or not the application in the internal storage medium corresponds to the map data in the external storage medium that is currently connected by referring to the conformance correspondence data. If not, the application recorded on the external storage medium is read out to the internal storage medium for use in place of the current application. Therefore, even if an application version older than the version of the application currently stored in the internal storage medium is recorded in the external storage medium, if the application in the internal storage medium is incompatible with the current map data, the external storage Read and use applications in the media. Therefore, the possibility that the application to be used becomes incompatible with the map data used is reduced.

  According to a second aspect of the present invention, the changing means uses the first application for the second map data on the basis of the positive determination result of the determining means. It may be held on the medium.

  In this way, even if the application currently recorded on the internal storage medium is different from the application currently recorded on the external storage medium, the application in the internal storage medium is adapted to the map data to be used. Then, the application in the internal storage medium can be used continuously.

  Therefore, for example, even when the latest version of the application is recorded on the internal storage medium and the old version of the application and map data are recorded on the external storage medium that is currently connected, the application to be used is unconditional. If the latest version of the application is compatible with the old version of the map data, the latest version of the application is continuously used. Therefore, the possibility that the application is unnecessarily downgraded is reduced.

  According to a third aspect of the present invention, the first external storage medium is a version of an application adapted to the map data for each of the first map data and the map data of a version older than the first map data. Is stored in the second external storage medium, and the second external storage medium is an application adapted to the map data for each of the second map data and a version of the map data older than the second map data. Second correspondence data indicating the version may be recorded. In this case, the map data utilization device determines which one of the first correspondence data and the second correspondence data is newer, and obtains the data determined to be newer as matching correspondence data ( 105-125).

  In this way, new correspondence data recorded in the external storage medium that has been connected to the reading apparatus from the past to the present can be used as the conformance correspondence data. Since the new correspondence data can be created after the creation of the new application, it is possible to include information on whether or not the new version of the application matches the past version of the map data.

  The features of the present invention can also be understood as a program used for a map data utilization device. Further, as data to be recorded in the external storage medium data used in the map data utilization apparatus of the present invention, map data, a version of the map data, an application for using the map data, Data for an external storage medium that includes a version and corresponding data indicating the version of the application that matches the map data and the version of the map data older than the map data can be used.

  In addition, the code | symbol in the bracket | parenthesis in a claim shows the correspondence of the term described in the claim, and the concrete thing etc. which illustrate the said term described in embodiment mentioned later.

  Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows a hardware configuration of a vehicle navigation apparatus (corresponding to an example of a map data utilization apparatus) 1 according to the present embodiment. The vehicle navigation device 1 includes a position detector 11, an image display device 12, an operation unit 13, a speaker 14, a map media reading device 15, a RAM 16, a ROM 17, and a CPU 18.

  The position detector 11 includes a well-known sensor (not shown) such as a geomagnetic sensor, a gyroscope, a vehicle speed sensor, and a GPS receiver. The current position and direction of the vehicle based on the characteristics of each of these sensors. , And information for specifying the speed is output to the CPU 18. The image display device 12 displays a video based on the video signal output from the CPU 18 to the user. The operation unit 13 directly accepts a user operation and outputs a signal corresponding to the accepted operation to the CPU 18.

  A DVD media can be removably inserted into the map media reader 15. The map media reader 15 can read the data recorded on the inserted DVD medium and output the read data to the CPU 18 and the RAM 16 under the control of the CPU 18. In the present embodiment, the map DVDs 20 and 21 are used as appropriate as DVD media to be inserted into the map media reader 15.

  In each of the map DVDs 20 and 21, map data, applications, and additional information data are recorded. The map data is data including information such as the arrangement, structure, and connection relationship of roads and facilities on the map. The application is a program that the CPU 18 executes when using map data.

  2 and 3 illustrate additional information data. Each row except the first row in each figure corresponds to additional information data included in one map DVD. As shown in these drawings, one additional information data includes a map version, an application version, a map application correspondence table, and a correspondence table version.

  The map version is information indicating the version of the map data recorded on the map DVD. With this map version, the old and new degree of the map data can be specified. In this example, the larger the version number, the newer the map data. Specifically, the versions of the map data recorded on the 06, 07, and 2008 version map DVDs are M6, M7, and M8, respectively.

  The application version is information indicating the version of the application recorded on the map DVD. By this application version, the old and new degree of the application can be specified. In this example, the larger the version number, the newer the application is. Specifically, the versions of the application recorded on the 06, 07, and 2008 version map DVDs are A6, A7, and A8, respectively.

  The map application correspondence table is information indicating which version of the application is compatible with each of the map data recorded on the map DVD and the version of the map data older than the map data.

  An application conforms to a certain map data means that when the map data is used in the execution of the application, there is no error between the request for the map data of the application and the data structure of the map data. Say. As an example of a case where an application does not conform to a certain map data, the map data is a voice data even though the application requests to obtain the voice data from a specific position in the map data. May not be included.

  In the example of FIG. 2, the map application correspondence table included in the 2006 version of the map DVD includes information that the A6 version of the application is compatible with the M6 version of the map data. Further, the map application correspondence table included in the 2007 version map DVD includes information that the A7 version of the application matches the map data of both the M6 and M7 versions. Further, the map application correspondence table included in the 2008 version map DVD includes information indicating that the A8 version application is compatible with all of the map data of the M6, M7, and M8 versions. Therefore, in the version DVD 2006-08 version map DVD as shown in FIG. 2, each application is adapted to both the map data recorded on the same map DVD as the application and the previous map data. It has become.

  In the example of FIG. 3, the map application correspondence table included in the 2006 version of the map DVD includes information indicating that the A6 version of the application is compatible with the M6 version of the map data. In addition, the map application correspondence table included in the 2007 version of the map DVD indicates that the A6 version of the application conforms to the M6 version of the map data, and the A7 version of the application conforms to the M7 version of the map data. Contains information. That is, the A7 version of the application is not compatible with the M6 version of the map. In addition, the map application correspondence table included in the 2008 version of the map DVD matches the A6 version of the application with the M6 version of the map data, and the A8 version of the application with the map data of both the M7 and M8 versions. Contains information to do so. Accordingly, in the version DVD of the 2006-08 version of the map DVD as shown in FIG. 3, in order to use the map data of the 2006 version of the map DVD, an application newer than the application of the 2006 version of the map DVD is Cannot be used.

  Note that each application is adapted to map data recorded on the same map DVD even if the map application correspondence table does not include information to that effect.

  The RAM 16 is a working storage medium for the CPU 18. This RAM 16 is a backup RAM. That is, the RAM 16 is always supplied with power from the battery so that the stored contents can be maintained even when the engine of the vehicle is stopped. A specific method of using the RAM 16 by the CPU 18 will be described later.

  The ROM 17 is a nonvolatile storage medium that contains programs, data, and the like used by the CPU 18. A program included in the ROM 17 includes a boot program for startup processing.

  A CPU (corresponding to a computer) 18 executes programs on the RAM 16 and ROM 17, reads information from the RAM, ROM, and the inserted map DVD, and writes information to the RAM. The position detector 11, the image display device 12, the operation unit 13, and the speaker 14 are exchanged with signals.

  Specifically, the CPU 18 executes the boot program in the ROM 17 when the vehicle engine switch is turned on or the ACC is turned on (that is, when the main power of the vehicle navigation device 1 is turned on), Thereafter, the application held in the RAM 16 is executed.

  By executing the application on the RAM 16, the CPU 18 performs map display processing, navigation processing, and the like.

  In the map display process, a map DVD around the current position specified based on the signal from the position detector 11 or a map around the position specified by the user via the operation unit 13 is inserted into the currently inserted map DVD. This is a process of configuring the map based on the map data in the middle and causing the image display device 12 to display the configured map.

  The navigation process accepts the input of the destination by the user via the operation unit 13, calculates the optimum guidance route from the current position to the destination, and advances the vehicle along the guidance route by voice, image, etc. It is a process to guide. As guidance by sound and image, for example, when necessary, such as when the host vehicle arrives before a right-left turn intersection along the guidance route, a guidance voice signal instructing right turn, left turn, etc. is sent to the map on the current map DVD. There are a method of reading out from the data and outputting it to the speaker 14 and a method of reading out an enlarged view of the intersection from the map data in the current map DVD and displaying it on the image display device 12.

  The boot program includes a subprogram for determining whether to read an application from the inserted map DVD to the RAM 16 and to read the application to the RAM 16 when it is determined to read the application. ing. FIG. 4 shows a flowchart of this subprogram 100. The CPU 18 executes the subprogram 100 each time the main power of the vehicle navigation device 1 is turned on and when the map DVD is inserted into the map media reader 15.

  In the execution of the subprogram 100, the CPU 18 first determines in step 105 whether or not the map application correspondence table is held in the RAM 16, and if it is held, subsequently executes step 110 to hold it. Then, step 125 is executed.

  In step 110, the version RV1 of the map application correspondence table in the map DVD currently inserted in the map media reader 15 is confirmed. Specifically, the contents of the correspondence table version in the map DVD are identified as the version of the map application correspondence table.

  In step 115, the version RV2 of the map application correspondence table in the RAM 16 is confirmed. Specifically, the contents of the correspondence table version in the RAM 16 are identified as the version of the map application correspondence table. As will be described later, both the map application correspondence table and the corresponding correspondence table version are read out to the RAM 16.

  Subsequently, in step 120, it is determined whether or not the version RV1 specified in step 110 is newer than the version RV2 specified in step 115. If it is new, step 125 is executed. If not, step 130 is executed. Execute.

  In step 125, the map application correspondence table is read from the map DVD to the RAM 16, thereby replacing the map application correspondence table in the RAM 16 with the map application correspondence table of the map DVD. Further, in step 125, the corresponding table version is read from the map DVD to the RAM 16, thereby replacing the corresponding table version in the RAM 16 with the corresponding table version of the map DVD. Following step 125, step 130 is executed.

  In step 130, it is determined whether or not an application is held on the RAM 16. If it is held, step 135 is subsequently executed. If not held, step 155 is subsequently executed.

  In step 135, the version AV of the application on the RAM 16 is confirmed. Specifically, the contents of the application version in the RAM 16 are identified as the version of the application. As will be described later, both the application and the application version accompanying the application are read out to the RAM 16.

  Subsequently, in step 140, the version MV of the map data in the map DVD currently inserted in the map media reader 15 is confirmed. Specifically, the contents of the map version in the map DVD are identified as the version of the map data.

  Subsequently, in step 145, the version of the application conforming to the map version MV specified in step 140 is specified based on the map application correspondence table on the RAM 16.

  Subsequently, in step 150, it is determined whether or not the application version specified in step 135 matches the map version MV specified in step 140. Specifically, if the application version specified in step 135 corresponds to the version of the application specified in step 145, it is determined to be compatible, and otherwise, it is determined not to match. If it is determined that it does not match, step 155 is subsequently executed. If it is determined that it does not match, the current execution of the subprogram 100 is terminated.

  In step 155, the application in the RAM 16 is replaced with the application of the map DVD by reading the application from the map DVD into the RAM 16. Further, in step 155, the application version in the RAM 16 is replaced with the application version of the map DVD by reading the application version from the map DVD into the RAM 16. After step 155, the current execution of the subprogram 100 is terminated.

  By executing the subprogram 100 as described above, the CPU 18 inserts the version of the map application correspondence table on the RAM 16 when the map application correspondence table does not exist on the RAM 16 (see step 105 → NO) and the version of the map application correspondence table on the RAM 16 is currently inserted. When the version of the map application correspondence table in the map DVD is older than the version (see step 120 → YES), the map application correspondence table and the correspondence table version in the map DVD are read onto the RAM 16 (see step 125). As a result, the map application correspondence table in the RAM 16 becomes the latest version of the map application correspondence table among all the map application correspondence tables recorded on the map DVD that has been inserted into the map media reader 15 so far. .

  The CPU 18 also has no application on the RAM 16 (see step 130 → NO), and when the application held on the RAM 16 does not match the map data in the currently inserted map DVD (step 150 → NO). Regardless of whether the version of the application is new or old, the application is read from the map DVD to the RAM 16 (see step 155). After that, by executing the read application, various processes (map display process, navigation process, etc.) using the map data are realized.

  In the vehicle navigation apparatus 1 operating as described above, an example in which the map DVD 20 is first inserted and then the map DVD 21 is inserted in a state where neither the application nor the map application correspondence table is held on the RAM 16 will be described. To do.

(1) Example when the map DVDs 20 and 21 are the 2008 version map DVD and the 2006 version map DVD in the version configuration as shown in FIG.
In this example, when the map DVD 20 is first inserted into the map media reader 15, the CPU 18 executes the subprogram 100, and the map application correspondence table and the correspondence table version (R8) in the map DVD 20 are read into the RAM 16. In addition, the application and application version (A8) in the map DVD 20 are read into the RAM 16 (see step 130 → 155).

  Subsequently, when the map DVD 21 is inserted into the map media reader 15 in place of the map DVD 20, the CPU 18 executes the subprogram 100 again. At this time, since the correspondence table version (R6) of the map DVD 21 is older than the correspondence table version (R8) in the RAM, the current map application correspondence table and the correspondence table version are held in the RAM 16 (see step 120 → NO). ).

  Further, according to the map application correspondence table in the RAM 16, the application version (A8) in the RAM 16 does not match the map data (version M6) of the currently inserted map DVD 21. Therefore, the old version of the application in the map DVD 21 is read into the RAM 16 instead of the current application on the RAM 16 (see step 150 → 155).

  As described above, the map data utilization device refers to the latest map application correspondence table (corresponding to an example of the conformance correspondence data) (see step 145), so that the application on the RAM 16 is in the map DVD 21 to which the application is currently connected. It is determined whether or not it corresponds to the map data (see step 150), and if it does not fit, the application recorded on the map DVD 21 is read out to the RAM 16 to be used instead of the current application (step 16). 155).

  Therefore, even if an application version older than the version of the application currently stored in the RAM 16 is recorded on the map DVD 21, if the application in the RAM 16 is incompatible with the current map data, the application in the map DVD 21 is read out. To use. Therefore, the possibility that the application to be used becomes incompatible with the map data used is reduced.

(2) Example in which the map DVDs 20 and 21 are the 2008 version map DVD and the 2006 version map DVD in the version configuration as shown in FIG.
In this example, when the map DVD 20 is inserted into the map media reader 15, the map application correspondence table, correspondence table version, application, and application version in the map DVD 20 are read into the RAM 16 (1). ).

  Subsequently, when the map DVD 21 is inserted into the map media reader 15 in place of the map DVD 20, the CPU 18 executes the subprogram 100 again. At this time, the current map application correspondence table and correspondence table version are also stored in the RAM 16 in the same manner as in the example (1).

  Furthermore, according to the map application correspondence table in the RAM 16, the application version (A8) in the RAM 16 is adapted to the map data (version M6) of the currently inserted map DVD 21. Therefore, the old version of the application in the map DVD 21 is not read into the RAM 16 and the current application on the RAM 16 is held as it is (see YES at step 150).

  As described above, when the application on the RAM 16 corresponds to the map data in the map DVD 21 to which the vehicle is currently connected, the vehicular navigation device 1 selects the application in the current RAM 16 for the map data in the map DVD 21. To be used in the RAM 16 (see step 150 → YES).

  In this way, even if the application currently recorded in the RAM 16 is different from the application currently recorded on the map DVD 21, if the application in the RAM 16 matches the map data to be used, the RAM 16 The application inside can be used continuously.

  Therefore, the latest version of the application is recorded in the RAM 16, and even if the old version of the application and map data are recorded on the currently connected map DVD 21, the application to be used is unconditionally changed to the old version of the application. Instead of changing, if the latest version of the application is compatible with the old version of the map data, the latest version of the application will continue to be used. Therefore, the possibility that the application is unnecessarily downgraded is reduced.

  In the above example (1), if the 2007 version map DVD is inserted instead of the map DVD 21 after the 2006 version map DVD 21 is inserted, the map application correspondence table is retained in the RAM 16 as it is. The And according to the said map application corresponding | compatible table, the version of the application corresponding to the version (M7) of the map data of the inserted map DVD is A8. The current version of the application in the RAM 16 is A6. Therefore, the determination result in step 150 is negative, and subsequently, in step 155, the application of version A7 is read from the map DVD to the RAM 16. Since the application and the map data recorded on the same map DVD are compatible with each other, such an operation does not increase the possibility that the application to be used does not match the map data used.

  Each of the map DVDs 20 and 21 includes a map application correspondence table (first correspondence data, first version data) indicating the version of the application that matches the map data for each of the map data and a version of the map data older than the map data. Corresponding to an example of second correspondence data). Then, the vehicle navigation apparatus 1 reads out the newer one of the map application correspondence tables in the map DVDs 20 and 21 to the RAM 16 as the compatible correspondence data to be used.

  In this way, new correspondence data recorded on the map DVD that has been connected to the map media reader 15 from the past to the present can be used as the matching correspondence data. Since the new correspondence data can be created after the creation of the new application, it is possible to include information on whether or not the new version of the application matches the past version of the map data.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, the scope of the present invention is not limited only to the said embodiment, The various form which can implement | achieve the function of each invention specific matter of this invention is included. It is.

  For example, in the above embodiment, a DVD medium is exemplified as a replaceable external storage medium, but the external storage medium may be another type of storage medium such as a CD medium or a USB memory.

  In the above embodiment, the RAM 16 is exemplified as the internal storage medium, but a flash ROM may be used as the internal storage medium instead of the RAM 16. As an internal storage medium, both writing and reading are possible, and even if the engine switch is turned off and the main power supply of the map data utilization device is turned off, the storage contents are retained. Any medium may be used as long as it is a medium.

  In the above embodiment, each function realized by the ROM 17 executing the subprogram 100 is realized using hardware having these functions (for example, an FPGA capable of programming a circuit configuration). You may come to do.

  Moreover, in the said embodiment, although a navigation apparatus is a vehicle-mounted type, a navigation apparatus may be mounted in a ship and an airplane, and may be a thing of the type which a person can carry. . For example, a mobile phone having a navigation device function also corresponds to the map data utilization device of the present invention.

  Moreover, the map data utilization apparatus of this invention is not restricted to a navigation apparatus, What kind of thing may be used as long as it utilizes a map.

1 is a diagram illustrating a configuration of a vehicle navigation device 1 according to an embodiment of the present invention. It is a chart which illustrates additional information data in map DVD. It is a chart which illustrates additional information data in map DVD. It is a flowchart of the read-out process of the application performed when CPU18 runs a boot program. It is a flowchart which shows an example of the action | operation of the conventional navigation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle navigation apparatus, 2 ... In-vehicle camera system, 11 ... Position detector,
DESCRIPTION OF SYMBOLS 12 ... Image display apparatus, 13 ... Operation part, 14 ... Speaker, 15 ... Map media reader,
16 ... RAM, 17 ... ROM, 18 ... CPU, 20, 21 ... Map DVD.

Claims (5)

An internal storage medium (16);
A processing circuit (18) for executing an application recorded in the internal storage medium;
A first external storage medium (20) on which the first map data and a first application for using the first map data are recorded; the second map data; and the second map data
A second external storage medium (21) on which a second application for using the map data is recorded is connected in a replaceable manner, and a reading device (15) for reading data in the connected external storage medium ) And
The processing circuit includes:
A first version of the first application that is read from the first external storage medium connected to the reading device in the past into the internal storage medium and that is currently held in the internal storage medium; 1 confirmation means (135);
Second confirmation means (140) for confirming a version of the second map data recorded in the second external storage medium currently connected to the reading device;
Determination means for determining whether or not the version of the first application matches the version of the second map data based on the matching correspondence data indicating the version of the application that matches the version of the second map data. (145, 150),
Based on the determination result of the determination means being negative, the second application recorded on the second external storage medium is used as the internal storage medium for use in place of the first application. A map data utilization device comprising: a changing means (155) for reading. The changing means continues to hold the first application in the internal storage medium as being used for the second map data based on a positive determination result of the determining means. The map data utilization apparatus according to claim 1, wherein: The first external storage medium includes, for each of the first map data and the map data having a version older than the first map data, first correspondence data indicating a version of an application conforming to the map data. Recording,
The second external storage medium stores, for each of the second map data and the map data of a version older than the second map data, second correspondence data indicating an application version adapted to the map data. Recording,
The map data utilization device determines which one of the first correspondence data and the second correspondence data is newer, and obtains the data determined to be newer as the matching correspondence data ( 105-125), The map data utilization apparatus according to claim 1 or 2. An internal storage medium (16);
A processing circuit (18) for executing an application recorded in the internal storage medium;
A first external storage medium (20) on which the first map data and a first application for using the first map data are recorded; the second map data; and the second map data
A second external storage medium (21) on which a second application for using the map data is recorded is connected in a replaceable manner, and a reading device (15) for reading data in the connected external storage medium ), And a program used for a map data utilization device comprising:
The processing circuit;
A first version of the first application that is read from the first external storage medium connected to the reading device in the past into the internal storage medium and that is currently held in the internal storage medium; 1 confirmation means (135),
Second confirmation means (140) for confirming the version of the second map data recorded in the second external storage medium currently connected to the reading device;
Determination means for determining whether or not the version of the first application matches the version of the second map data based on the matching correspondence data indicating the version of the application that matches the version of the second map data. (145, 150), and the second recorded in the second external storage medium for use in place of the first application on the basis of the negative determination result of the determination means. A program for causing an application to function as changing means (155) for reading out data to the internal storage medium. Data for an external storage medium to be recorded on a replaceable external storage medium (20, 21) that is replaceably connectable to the reading device of the map data utilization device according to claim 3,
Map data,
A version of the map data;
An application for using the map data;
A version of the application;
For each of the map data and map data of a version older than the map data, corresponding data indicating the version of the application conforming to the data,
When the replaceable external storage medium is read as the first external storage medium by the reading device of the map data utilization device, the version of the application is the version of the first application in the first confirmation unit. Used,
When the replaceable external storage medium is read as the second external storage medium by the reader of the map data utilization device, the version of the map data is determined by the second confirmation unit of the map data utilization device. Used as the second map data version,
When the replaceable external storage medium is read as the first external storage medium by the reading device of the map data utilization device, the correspondence data is used as the first correspondence data,
When the replaceable external storage medium is read by the reading device of the map data utilization device as the second external storage medium, the correspondence data is used as the second correspondence data. Data for storage media.

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