JP2007279488A - Method and system for updating map data - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a system for updating map data, to be used for an HDD navigation device, with which updating of data is facilitated, the number of disks for updating data is reduced as far as possible, and a management cost is reduced. <P>SOLUTION: Difference data wherein data is different between an old map file and a new map file is recorded in the unit of a file in an updating disk for each area where a navigation device is used and for each version with which the data are updated in each area. When the updating disk is loaded on a disk reproducing device of the HDD navigation device, the area used by this navigation device and the version of the map data recorded in the hard disk are detected, the versions to be updated by the hard disk in the area which the navigation device deals with in the data recorded in the loaded updating disk are selected in the ascending order, and the map data in the hard disk is successively updated up to the latest version. At that time, a new serial number is given to the updated file. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a map data update method and apparatus used for a navigation device using an HDD, and more particularly, a plurality of areas such as a plurality of countries and a plurality of versions of update data are recorded on a recording medium for updating map data, and navigation is performed. The present invention relates to a map data update method and method that can select and update necessary data by a device.

  In a navigation apparatus mounted on a vehicle or the like, map data for drawing a map and facility information data for searching for a facility have been recorded in a CD-ROM, DVD-ROM, etc. Since the size (hereinafter abbreviated as HDD) is small and inexpensive, a large amount of such data is recorded on the HDD for use. Since the HDD can further rewrite data, a user can write various data, and a large amount of audio data is written and used.

  In the vehicle navigation device, the map / information data recording medium of such various discs, the data capturing device for capturing the data of the map / information data recording medium, the monitor for displaying the map, the GPS receiver, and the traveling Using a self-contained navigation device using a distance sensor, gyro, etc., and having a vehicle position detection device that detects the current position of the vehicle and the direction of travel, map data including the current position of the vehicle is read from a map / information data recording medium The map image around the vehicle position is drawn on the monitor screen based on the map data, the vehicle position mark is superimposed on the monitor screen, and the map image is scrolled according to the movement of the vehicle. Alternatively, fix the map image on the screen and move the vehicle position mark so that you can see at a glance where the vehicle is currently traveling. That.

  The map data stored in the map / information data recording medium as described above is divided into longitude and latitude widths of appropriate sizes according to various scale levels, and roads are expressed in longitude and latitude. Stored as a coordinate set of the selected nodes. A road is composed of a combination of two or more nodes, and map data displays a road layer consisting of a road list, a node table, an intersection configuration node list, etc., and roads, buildings, facilities, parks, rivers, etc. on the map screen. Map data such as a background layer, and information data for displaying characters, map symbols, etc., such as administrative division names such as municipalities, road names, intersection names, and facility names.

  In addition, this navigation device is provided with a route guidance function for allowing the user to easily travel on the road toward a desired destination or waypoint without making a mistake. According to this route guidance function, a destination is set by various means, and an appropriate route is calculated and presented in consideration of various conditions among routes connecting these points from the departure point to the destination. It has become. Also, the route selected by the user is stored as a guide route, and while driving, the guide route is drawn on the map image with a different color from other routes and displayed on the screen. When approaching an intersection where the course of course should be changed within a certain distance, the intersection is enlarged and displayed on the screen by drawing an arrow indicating the direction in which the course should be changed, or a right or left turn is guided by voice. In this way, the user can be guided to the destination.

  In such a navigation device, the map information is extremely important information, and the user can display a wide area map as needed to grasp the whole or display a detailed map to display detailed information on a specific point. In addition to knowing, it is desirable to change the scale between them in units of as fine a scale as possible and display a map of the scale most suitable for the situation. Therefore, in the conventional map data, from the most detailed map that can be displayed for each house, the city map that displays main buildings and facilities as appropriate mainly based on the road map, and a larger scale Use a topographic map that displays major roads, railroads, lakes, lakes, etc. as the map, and a topographic map that mainly displays the topography as the largest scale map, and prepare maps in appropriate scale units in each map. Yes. Especially for recent map data, when preparing map data for each scale, map data is prepared in units of the finest possible scale, and a map of a specific scale is displayed to smoothly expand or reduce the map. To be able to do that.

  However, the map data recorded on the HDD as described above has changed due to changes in road data due to construction of new roads, new establishments and closures of various stores, new constructions and creations of houses, and the like. For this reason, taking advantage of the characteristics that the HDD can be easily rewritten, for example, data is upgraded every year, and the data of the HDD is upgraded by replacing the data with the data of the existing HDD. In that case, it is desirable to record a version in each data so that the amount of rewritten data is as small as possible, and to rewrite only the portion where the data differs depending on the version.

  Therefore, for example, in the technique disclosed in Patent Document 1 below, a menu for narrowing down the area where the map is to be updated is displayed. In this menu, an item for narrowing down based on the map and a narrowing down based on the route are displayed. When an item based on a map is selected from the displayed menu items, update data based on administrative divisions such as prefectures and cities is selected and imported, and the captured update data is reflected. Techniques for processing are proposed. In the technology disclosed by the applicant of Patent Document 2 below, the difference data created by comparing the old map data and the new map data is input to the navigation device, and the old map data is converted using the difference data. Updated to new map data.

  When a recording medium such as a DVD in which old and new difference data is recorded using various map data update processing techniques as described above, the difference data is updated every year for data from several years ago, for example, version 5 All existing versions must be able to be updated to the latest version 5. For this purpose, for example, version 1 (Ver. 1) to Ver. 5, Ver. 2 to Ver. 5, Ver. 3 to Ver. 5, Ver. 4 to Ver. 5 must be able to update the data respectively. Therefore, it is necessary to create difference data for each of these. 1 to Ver. The data to be updated to Ver. 2 to Ver. 5 includes data to be updated. From this, Ver. 4 to Ver. Except for the difference data to be updated to 5, all the version upgrade data have duplication. For this reason, the data gradually becomes enormous, and all the update data cannot be recorded on a single disc such as a DVD, and it is necessary to take measures such as creating a disc on which update data is recorded for each version.

  Therefore, for example, as shown in FIG. An update disk corresponding to each of the previous versions, in which difference data to be updated to data 5 is recorded, is distributed to the service center S, or can be directly distributed according to the order, and the HDD of company A The domestic user U1 who uses the navigation device is Ver. When the user wants to upgrade to version 5, the domestic user U1 goes to a dealer H such as a nearby dealer or vehicle-related product dealer, and the dealer H removes the HDD and installs a data rewrite machine K. This is sent to the service center S. At this time, the domestic user U1 may go directly to the nearest service center S and have the HDD removed.

  At that time, in the service center S, the map version of the HDD brought in is Ver. 3, the previously distributed Ver. 3 to Ver. 5. Select a disk to be updated to 5 and load it in a data rewrite machine K such as a personal computer. Connect the HDD to this data rewrite machine K with a cable such as IEEE1394, and write the differential data recorded on the disk to the HDD. It becomes. Similarly, navigation manufacturers F and G will perform the same version upgrade of map data at the same service center, the service center of each company, or the service center of the vehicle manufacturer.

  Further, as shown in FIG. 6, the navigation apparatus manufacturer A manufactures a navigation apparatus that is mounted in advance on a vehicle manufactured by the vehicle manufacturer, in addition to manufacturing the navigation apparatus unique to the manufacturer. Further, in addition to the domestic use as described above, map data is also created for the navigation apparatus used in the C region such as the country A, the country B, and the EU, and update data is also created. Therefore, it is necessary to create an extremely large number of data update disks as shown in the drawing.

  In addition, for example, when manufacturing and delivering a navigation device with HDD for a specific vehicle type to Company C, a car manufacturer headquartered in Country A, the specific vehicle type is Country B, EU, etc. Exported to local countries and regions, or locally produced. Therefore, the same navigation device is used in each country, and each map data is used. At this time, in order to upgrade the version of the data, the navigation device manufacturer A produces a disc in which the update data for each version is recorded for the map data for each country and region. After delivery, the car manufacturer C distributes the disk to service centers in each country or distributes it to major car related merchandise stores. In that case, it is also distributed directly from the company A to such a service center or the like according to an instruction from the company C. In service centers and the like in each country, data update processing is performed on the HDD brought in by the user in the same manner as in the domestic market, and the HDD is installed in the user's vehicle.

  In the data update process as described above, the navigation device with HDD or the head unit with HDD is removed from the user's vehicle at the agency store H or the like, and the data is updated at the service center equipped with the data rewrite machine. It may take several days for the process to be installed on the vehicle, and the user cannot use these devices during that time, which is inconvenient.

  As a countermeasure, as shown in the domestic user U2 etc. described as the future prediction in FIG. 6, the navigation device with HDD is provided with a DVD playback function, or the DVD playback connected separately from the HDD. The DVD player can be used for data communication with the device, and a DVD corresponding to the version update of the navigation device of the own vehicle created by the navigation device manufacturer A is obtained from this DVD, or purchased at the store H, and the DVD playback device. It is considered that the update is performed using the difference data recorded on the DVD by the HDD update processing program or software recorded on the DVD. This eliminates the need for the user to remove the HDD or head unit from the vehicle, and allows data to be updated while the house or vehicle is running.

The update method of the map data recorded on the HDD using such a DVD playback apparatus is as a future prediction in the figure when the user indicated as the user U3 in country A in FIG. As described, purchased from a dealer J in A country, etc., who has purchased an update DVD on which difference data for each version created by the navigation data creation department of Company A is recorded, When the vehicle is running, it can be loaded into a DVD playback device mounted on the vehicle and the map data of the HDD can be updated.
International Publication No. 2004-8073 JP 2004-287705 A

  As described above, in a navigation device that writes and uses data in an HDD, data can be easily updated. Therefore, when a DVD playback device is installed in a vehicle, it corresponds to the data version of the vehicle. Thus, it is possible to rewrite the data in the HDD by taking out the loaded DVD and loading it on the DVD, and it is possible to solve the current problem that the HDD has to be removed.

  However, in the data creation department of the navigation device manufacturer, etc., the DVD on which the difference data corresponding to each version is recorded for version upgrade cannot be stored on one sheet due to duplication of data, and one DVD for each version upgrade. A DVD is required, and many update DVDs are required. As shown in FIG. 6, a data update DVD in which such rewrite differential data is recorded is required for each country, and a huge number of types of DVDs are created and will increase year by year. Management of such a DVD becomes extremely complicated and the management cost increases.

  This is also true when, for example, Company C in Country A exports the same model to various parts of the world, or is producing locally, or when trying to accommodate users of vehicles equipped with HDD navigation devices in each country. The same applies to Company C, so that DVDs on which the above-mentioned various rewritable difference data previously obtained from Company A are recorded can be sent to the countries where they are needed, so that requests from users can be handled immediately. It is necessary to keep it. For this reason, Company C also requires complicated management of a large number of DVDs, resulting in an increase in cost.

  Therefore, according to the present invention, in a navigation apparatus that writes and uses map data in an HDD, data can be easily updated, and the number of data update disks can be reduced as much as possible. It is an object to facilitate management and reduce management costs.

  In order to solve the above problems, for example, as shown in a schematic diagram of FIG. 5, the present invention records rewriting data for a plurality of countries and regions on a differential rewriting disk for updating versions, As for the difference rewriting data for the region or the region, only the difference data different from the previous version is recorded for each version from the oldest version to the newest version. When using this differential rewritable disc, users in each country use the same disc, load it into an HDD navigation device equipped with a DVD playback device, and read the data of a predetermined country using the region identification function of the navigation device. And the necessary data is selected in comparison with the version of the data of the own vehicle, and the oldest version of the data is rewritten in order. At that time, when the vehicle is not reading data from the navigation device, the rewriting process is performed as a background process.

  More specifically, the present invention is performed as follows. That is, the map data update method according to the present invention records the difference data in which data is different between the old map file and the new map file on a plurality of update disks for each version in which the data is updated, When the update disk is loaded into a disk playback device of a navigation device having a hard disk on which data is recorded, the version of the map data recorded on the hard disk is detected, and the data recorded on the loaded update disk Then, the version to be updated by the hard disk is selected in order from the oldest, and the map data on the hard disk is updated to the latest version in order.

  In addition, another map data update method according to the present invention provides difference data in which data is different between the old map file and the new map file for each area where the navigation device is used and for each version in which the data is updated in each area. When the update disk is loaded into a disk playback device of a navigation device provided with a hard disk on which a plurality of update disks are recorded and map data is recorded, the map data recorded on the hard disk and the area used by the navigation device In the area corresponding to the navigation device in the data recorded on the loaded update disk, the version updated by the hard disk is selected from the oldest and the map data on the hard disk is updated to the latest version. It is characterized by updating sequentially .

  Another map data update method according to the present invention is the map data update method, wherein the difference data to be recorded on the update disk is created for each map data file and given a series of serial numbers, When map data is updated, serial numbers that are not yet used are sequentially assigned to files updated using the difference data, and the serial number update is recorded and managed in a serial number management file. .

  Another map data update method according to the present invention is characterized in that, in the map data update method, the map data update process is performed in the background when a hard disk is not used in the navigation device.

  In addition, the map data update method according to the present invention creates a disk for updating by recording a plurality of difference data for which the data is different between the old map file and the new map file for each version in which the data is updated, and records the map data. A hard disk map data version detecting means for detecting a version of map data recorded on the hard disk when the update disk is loaded into a disk playback device of a navigation device having a hard disk; Update data version selection means for selecting the version of the data corresponding to the hard disk in the recorded data in chronological order, and update data writing means for sequentially updating the hard disk map data to the latest version It is characterized by.

  In addition, another map data update method according to the present invention is based on the difference data in which data is different between the old map file and the new map file for each area where the navigation device is used and for each version in which the data is updated in each area. A data area detecting means for detecting an area used by the navigation device when the update disc is loaded into a disc playback device of a navigation device comprising a hard disk in which a plurality of update discs are recorded and a map data is recorded; A hard disk map data version detecting means for detecting the version of the map data recorded on the hard disk, and the hard disk corresponds to the area corresponding to the navigation device in the data recorded on the loaded update disk Barge to And update data version selection means for selecting the emission of data in chronological order, the map data of the hard disk until the latest versions, and comprising the update data writing means for updating the order.

  According to another map data update method of the present invention, in the map data update method, an update disk in which the difference data is recorded is used for each map data file assigned with a series of serial numbers. When updating the map data, a serial number update means for updating the serial number of the file updated using the difference data to a number that is not yet used, and a serial number management file for managing the update of the serial number It is characterized by having.

  In addition, another map data update method according to the present invention is characterized in that, in the map data update method, the update data writing means performs writing in the background when a hard disk is not used in the navigation device.

  According to the present invention, in a navigation device that writes and uses map data in an HDD, data can be easily updated, and the number of data update disks can be reduced as much as possible. And management costs can be reduced.

  According to the present invention, in a navigation device that writes and uses map data in an HDD, data can be easily updated, and the number of data update disks can be reduced as much as possible. In order to facilitate management and reduce management costs, the map data is recorded by recording the difference data, which is different in data between the old map file and the new map file, on multiple update disks for each updated version of the data. When the update disk is loaded into a disk playback device of a navigation device having a hard disk, the version of the map data recorded on the hard disk is detected, and the hard disk is the data recorded on the loaded update disk. Select the versions to be updated in chronological order. Click of the map data to the latest version, it was realized by updating the order.

  FIG. 1 shows a functional block diagram of an embodiment of the present invention, in which an update DVD 22 created by the map update processing data creation unit 11 is played by a DVD playback unit 43 of the navigation device 30, and a map data update processing unit 44. In this example, the map data of the hard disk (HDD) 41 is updated by the above process. In the map update processing data creation unit 11, the map file data input unit 12 inputs the old map file 13 and the new map file 14, and the difference extraction processing unit 15 compares both the files and the data is different. Extract the difference. Based on the serial number management file 16, a new serial number that has not been used so far is assigned to the file in which the difference data obtained by the difference extraction process is recorded.

  In the above processing, for example, when there is an old map file as shown in FIG. 3 (a), a series of file serial numbers are assigned to all the files in advance. In the illustrated example, file serial numbers of files 0 to 99 are assigned to data consisting of 100 files. In addition, although the difference is large depending on various map data, in fact, there are often 100,000 or more files.

  In such map data, for example, for the file with serial number 1, the data B portion is data that needs to be updated, and for the serial number 99 file, there is data that needs to be updated in the data E portion. Difference data between the file 1 and the file 99 is extracted as new data obtained by rewriting all the data such as 3 (b). This processing is performed in the difference extraction processing unit 15 in FIG.

  When the difference between the old file and the new file is extracted, the update processing file creation unit 15 creates a new file of the extracted difference. At this time, in addition to the old serial number for identifying the old file, a new serial number that is not used in the old map file is assigned to the map update processing file in which the differential data including the new data is recorded. In the example shown in FIG. 3, in the update processing file in which the new data B of the old map file 1 is recorded, the serial number 100 following the last serial number 99 in the old map file is recorded as the new serial number, and the old map The update processing file in which the new data E of the file 99 is recorded is given 101 following the previous serial number as a new serial number. A serial number management file 16 is created for such serial number management, and the update processing file creation unit 17 uses this data to select and record a new serial number, in which case the old file number is recorded. A symbol indicating that it is not used is recorded in the serial number management file 16.

  The file in which the difference data as described above created by the update processing file creation unit 17 is recorded is a plurality of areas including a plurality of countries and regions to be recorded on one DVD by the update data creation unit 18. Summarize the data. Further, in order to record a plurality of versions of data in the map data of each area, the data are collected in order. As described above, the update data is file data of only the difference, and since the update data is recorded for each version, there is no duplicate data, and the data amount is greatly reduced as a whole. Update data and data of a plurality of areas can be recorded.

  As such data for multiple version update processing in multiple areas, for example, in the example shown in FIG. 4, an area management file for managing areas such as country A, country B, and region C is provided first, and the area below An example in which data of two areas A and B is recorded is shown. For area A, Ver. 1 to Ver. 2 for updating to Ver. 2 to Ver. 3 for updating to Ver. 3 to Ver. In each version of data to be updated to 4..., Only data that has been changed when updating to the next version is recorded.

  For example, Ver. 1 to Ver. The data for updating to 2 includes a differential data management file and update actual data in which actual data for update is recorded. Examples of the update actual data include map drawing data, road shape data, POI data of various facilities and the like are included, and difference data is created for a file including updated data among these. Similarly, Ver. 2 to Ver. The same applies to other data such as data for updating to 3. In the area B, as in the area A, the version update data is recorded in order. After such data is created by the update data creation unit 18, it is recorded on one DVD by the DVD recorder 21, and the update DVD 22 is created.

  On the other hand, when the navigation device 30 having the HDD 41 in which the map data is recorded and having the DVD reproducing unit 43 is used to update the map data in the HDD 41 using the update DVD 22 created as described above, the map is particularly useful. Updating can be performed by the processing of the data update processing unit 44. In the navigation apparatus shown in FIG. 1, as in the conventional device, a ROM in which software for comprehensively performing various predetermined functions is recorded in the system control unit 31, a CPU and a RAM for processing the software, etc. And each functional unit connected thereto is controlled. In the illustrated navigation apparatus, an external communication unit 32 is connected to the system control unit 31 so that VICS data can be captured or data can be captured by communicating with an information center. The vehicle position detection unit 33 inputs the position data of the GPS receiver, and further inputs the movement data of the vehicle from the travel distance / orientation detection unit by a vehicle speed sensor or an angle sensor as necessary, thereby determining the current position of the vehicle. It is detected accurately.

  In the instruction signal input unit 34, an instruction signal for a remote controller or the like by a user in the navigation device is input. In the guidance route calculation unit 35, the current location of the vehicle detected by the vehicle position detection unit 33 is fetched, the map is scrolled by operating the cursor displayed on the screen, or the address is input, and further the telephone number The destination set by various methods such as inputting the destination is taken in, and the optimum guide route is calculated and presented under various conditions such as the shortest required time, the shortest distance, and general road priority. The guide route guide unit 36 stores the guide route finally selected by the user for the guide route calculated as described above, so that the user can safely and definitely travel from the current position to the destination. Guidance is provided by voice and screen. That is, in this navigation apparatus, the guidance voice from the voice output unit 37 is outputted from the speaker 38, and the map and guidance information are displayed on the monitor 40 from the image output unit 39.

  The data capture / write unit 42 captures necessary map data, facility information, and the like from the hard disk (HDD) 41, and further records update data and the like. In the DVD playback unit 43, various DVD data can be played and video and audio can be enjoyed, and the update DVD 22 can also be loaded. In this case, the navigation device 30 is provided with software provided in advance. Alternatively, update processing by the map data update processing unit 44 can be automatically performed by update software recorded on the update DVD.

  In the map data update processing unit 44, the area information recorded in advance in the navigation device 30 for the plurality of areas recorded in the area management file in FIG. 4 of the loaded update DVD 22 in the data area detection unit 45. Alternatively, the area is specified by the vehicle position data detected by the vehicle position detection unit 33, and it is detected which of the areas is recorded in the area management file.

  The HDD map data version detection unit 46 detects the version of the map data recorded on the hard disk 41. The update data version selection unit 47 selects the version data recorded in a predetermined area of the DVD corresponding to the version detected by the HDD map data version detection unit 46, and sequentially in other series of version update processing. Select a version. The difference data management file reading unit 48 reads the difference data management file of FIG. 4 in the selected version of data and identifies the file to be updated. The update data writing unit 49 reads the data from the update DVD for the file to be updated, and writes it into the HDD map data as shown in FIG.

  In the serial number update unit 50, a new serial number is assigned to the file whose data has been updated. Therefore, a new serial number is determined based on the data read from the update DVD 22 and stored in the serial number management file storage unit 51. Update to a number. Further, the serial number management file storage unit 51 is written to the effect that the updated serial number of the old file is not used. Such processing is performed for each file, and after all the specific versions have been performed, the next update data version is selected in the update data version selection unit 47, and thereafter the same operation is repeated to update the latest version. Map data.

  In the creation of such map update process data and the process of updating the HDD map data using the update DVD created there, the HDD data update process is operated in order according to the operation flow of FIG. A predetermined process can be performed. In the example of the HDD data update process shown in FIG. 2, the DVD playback unit 43 in the navigation device 30 of FIG. 1 is first created in the map update process data creation unit 11 in a plurality of areas on one disc. By loading a DVD in which difference data for a plurality of versions is recorded, the DVD playback unit 43 detects this difference disk (step S1).

  Next, corresponding area information is detected for the map data recorded on the hard disk (HDD) 41 in the navigation device 30 (step S2), and the version of the map data recorded on the HDD 41 is further detected (step S3). . Thereafter, in this example, the first version that needs to be updated in the corresponding area in the loaded differential disk is detected (step S4). At that time, for example, the version of the map data recorded in the HDD is Ver. 3 is detected by the HDD map data version detection unit 46, and the latest version in the corresponding area of the update DVD is Ver. 5, the first version that needs to be updated is Ver. 3 to Ver. The update data version selection unit 47 can select that the data is update data to 4.

  Next, the difference data management file of the corresponding version in the corresponding area is read from the loaded difference disk (step S5). This process is performed by reproduction of the DVD reproduction unit 43 in accordance with an instruction from the differential data management file reading unit 48 of FIG. In the example of data shown in FIG. 4, this data is recorded in the first part of each version update data in each area.

  Thereafter, the data in the HDD is compared with the difference data management file to determine whether there is update data (step S6). That is, when version upgrade data is created every year in each area, update data exists for a specific area, but actual data for update may not exist in other areas. To determine whether there is update data. When it is determined that there is update data, the actual update data is read (step S7), the HDD internal data difference update process is performed (step S8), and the serial number update process is performed after the update process is completed (step S9). . In these processes, the update data writing unit 49 in FIG. 1 outputs the data for writing to the HDD, and the data reading / writing unit 42 performs the actual writing process. Further, the serial number update unit 50 uses the data in the serial number management file storage unit 51 and writes it in the update file to the serial number that is not yet used.

  Thereafter, it is determined whether or not the differences of all the update files have been updated. When it is determined that the differences of all the update files in the version have not been updated yet, the process returns to step S7 and the above operation is repeated. Here, when it is determined that the differences of all the update files have been updated, and when it is determined in step S6 that there is no update data compared with the data in the HDD and the difference data management file, the update of all versions is finished. It is determined whether or not (step S11). If it is determined that the latest version has not yet been updated, the next version of the differential data management file in the corresponding area is read from the differential disk (step S12), and the process returns to step S6 to repeat the same operation as described above. If it is determined in step S11 that all versions have been updated, the HDD data update process is terminated.

  In the above embodiment, an example is shown in which a DVD is used as a disk for updating HDD data. However, if a large amount of data can be recorded, various similar disks can be used. In the above-described embodiment, an example in which data of a plurality of areas is recorded on the update disk is shown. However, data of a single area may be recorded.

It is a functional block diagram of the Example of this invention. It is an operation | movement flowchart of the HDD data update process in this invention. It is explanatory drawing of creation of the file for map update processing in this invention, and the new map file updated by the data. It is a figure which shows the data image in the difference disk of this invention. It is a figure which shows the disk for difference rewriting used by this invention, and its utilization form. It is explanatory drawing of the data update process predicted in the future by the map data update processing system in the conventional HDD navigation apparatus, and the system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Map update process data creation part 12 Map file data input part 13 Old map file 14 New map file 15 Difference extraction process part 16 Serial number management file 17 Update process file creation part 18 Update data creation part 19 Multiple areas 20 Multiple versions 21 DVD recorder 22 Update DVD
30 Navigation device 31 System control unit 41 Hard disk 42 Data reading / writing unit
43 DVD playback section 44 map data update processing section 45 data area detection section 46 HDD map data version detection section 47 update data version selection section 48 differential data management file read section 49 update data write section 50 serial number update section 51 serial number Management file storage

Claims (8)

Record the difference data in which the data is different between the old map file and the new map file on multiple update disks for each version in which the data is updated.
When the update disk is loaded into a disk playback device of a navigation device having a hard disk in which map data is recorded, the version of the map data recorded in the hard disk is detected,
A map data update method, comprising: selecting a version to be updated by the hard disk in chronological order from data recorded on a loaded update disk, and sequentially updating the map data on the hard disk to the latest version. The difference data in which the data is different between the old map file and the new map file is recorded on a plurality of update disks for each area where the navigation device is used and for each version in which the data is updated in each area,
When the disk for update is loaded into a disk playback device of a navigation device having a hard disk in which map data is recorded, an area used by the navigation device and a version of map data recorded in the hard disk are detected,
In the area corresponding to the navigation device in the data recorded on the loaded update disk, the version to be updated by the hard disk is selected in order from the oldest, and the map data on the hard disk is updated to the latest version in order. And map data update method. The difference data to be recorded on the update disk is created for each map data file and given a series of serial numbers,
At the time of updating the map data of the hard disk, serial numbers that have not been used yet are sequentially assigned to the files updated using the difference data,
3. The map data update method according to claim 1, wherein the update of the serial number is recorded and managed in a serial number management file.   3. The map data update method according to claim 1, wherein the map data update process is performed in the background when a hard disk is not used in the navigation device. Create an update disk that records multiple differences for each version in which the data is updated for the difference data that is different between the old map file and the new map file.
A hard disk map data version detecting means for detecting a version of map data recorded in the hard disk when the disk for update is loaded into a disk playback device of a navigation device including a hard disk in which map data is recorded;
Update data version selection means for selecting, in order from the oldest, the version data corresponding to the hard disk in the data recorded on the loaded update disk;
A map data update system comprising update data writing means for sequentially updating the map data on the hard disk up to the latest version. Create an update disk that records multiple differences in data between the old map file and the new map file for each area where the navigation device is used and for each version in which the data is updated in each area,
A data area detecting means for detecting an area used by the navigation device when the disk for update is loaded into a disk playback device of a navigation device having a hard disk in which map data is recorded, and a map data recorded on the hard disk. Hard disk map data version detection means for detecting the version,
Update data version selection means for selecting, in order from the oldest, the version data corresponding to the hard disk in the area corresponding to the navigation device in the data recorded on the loaded update disk;
A map data update system comprising update data writing means for sequentially updating the map data on the hard disk up to the latest version. For each map data file assigned with a series of serial numbers, when updating the map data on the hard disk using the update disk that records the difference data, the serial number of the file updated using the difference data is changed. Serial number update means to update to a number that is not yet used,
7. The map data update method according to claim 5, further comprising a serial number management file for managing update of the serial number.   The map data update method according to claim 5 or 6, wherein the update data writing means performs writing in the background when a hard disk is not used in the navigation device.

Images