JP6989641B2 - Updated map distribution device and navigation device - Google Patents

Description

The present invention relates to an updated map distribution device.

Generally, in order to display a map on a navigation device at a different scale, map data corresponding to a map at each scale is stored in the navigation device for each layer. Then, various methods have been proposed as a method of updating the map data stored in such a navigation device.
For example, as a method of updating the old map data stored in the navigation device to the new map data, the difference data between the old map data and the new map data generated in the map update server is used to update one layer. Based on the difference data, one layer of the old map data in the navigation device is updated to the new map data, and the content of the updated map data of the updated layer is reflected in the map data of the other layers, so that the map of all layers is used. There is a way to update the data.
See also Patent Documents 1-7, which disclose prior art related to the present invention.

International Publication No. 2010/007690 International Publication No. 2010/007689 Japanese Unexamined Patent Publication No. 2012-189448 Japanese Unexamined Patent Publication No. 2004-347988 Japanese Unexamined Patent Publication No. 2004-70323 Japanese Unexamined Patent Publication No. 2014-130232 Japanese Unexamined Patent Publication No. 2007-24103

However, according to the above method, since only the difference data corresponding to one layer is distributed to the navigation device, the distribution data size can be small, but the map data of all layers is updated in the navigation device. Increases the processing load on the navigation device and requires a long update time.
Therefore, as a result of repeated studies to reduce the processing load in the navigation device for updating the map and shorten the update time, the present inventors have made a map of all levels in the update map distribution device (in the map update server). By updating the data and distributing the updated map data of all layers to the navigation device, we came up with the idea that the update process will be simplified and the processing time will be shortened.

The present invention has been made in view of the above-mentioned problems, and the first aspect thereof is defined as follows. That is,
It is an updated map distribution device that distributes updated map data to the navigation device.
A map data storage unit that stores map data having multiple hierarchical structures with different scales,
An update information reception unit that receives update information for the map data,
By creating the updated map data from the map data based on the received update information, and / or reflecting the updated information of the updated map data in one layer in the map data in another layer. With the updated map data creation unit that creates the updated map data for all levels,
A distribution unit that distributes the created updated map data of all layers to the navigation device, and
Equipped with an updated map distribution device.

According to the updated map distribution device of the first aspect defined in this way, when the updated information for the map data is received, the new map data (updated map data) updated from the old map data based on the updated information. Or, the updated information of the updated map data of one layer is reflected in the old map data of the other layer to create the updated map data, and all the layers of the created updated map data are distributed to the navigation device. By creating the updated map data of all layers with the updated map distribution device and distributing it to the navigation device, the burden of updating work in the navigation device is reduced.

The second aspect of the present invention is defined as follows. That is,
In the updated map distribution device specified in the first aspect, the map data in the same layer and the updated map data should be collated, and the updated map data matching the map data should be excluded at the time of distribution. It is equipped with an exclusion target map and an exclusion target map identification part.
The distribution unit excludes the specified exclusion target map from the updated map data of all layers to be distributed.
According to the updated map distribution device of the second aspect defined in this way, the old map data before the update and the updated map data after the update are compared in the same layer, and if they match, the update is performed. Map data is specified as an exclusion target map and excluded from distribution. Therefore, the distribution data size can be reduced.

Further, the third aspect of the present invention is defined as follows. That is,
It is an updated map distribution method that distributes updated map data to the navigation device.
A map data storage step for storing map data having a plurality of hierarchical structures with different scales in the map data storage unit, and a map data storage step.
An update information reception step in which the update information reception unit receives update information for the map data, and
The update map data creation unit creates the update map data from the map data based on the received update information, and / or transfers the update information of the update map data in one layer to another layer. An updated map data creation step that creates the updated map data for all layers by reflecting it in the map data, and
A distribution step in which the distribution unit distributes the created updated map data of all layers to the navigation device, and
An updated map distribution method.
According to the invention of the third aspect defined in this way, the same effect as that of the first aspect is obtained.

The fourth aspect of the present invention is defined as follows. That is,
In the method specified in the third aspect, the exclusion target map identification unit collates the map data in the same layer with the updated map data, and delivers the updated map data that matches the map data at the time of the distribution. Equipped with an exclusion target map to be excluded and an exclusion target map identification step to identify
In the distribution step, the specified exclusion target map is excluded from the updated map data of all layers to be distributed.
According to the invention of the fourth aspect defined in this way, the same effect as that of the second aspect is obtained.

Further, the fifth aspect of the present invention is defined as follows. That is,
A computer program for delivering updated map data to navigation devices,
A map data storage means for storing map data having a plurality of hierarchical structures with different scales,
An update information receiving means for receiving update information for the map data,
By creating the updated map data from the map data based on the received update information, and / or reflecting the updated information of the updated map data in one layer in the map data in another layer. By, the updated map data creating means for creating the updated map data of all layers, and
A distribution means for distributing the created updated map data of all layers to the navigation device,
A computer program that functions as.
According to the invention of the fifth aspect defined in this way, the same effect as that of the first aspect is obtained.

The sixth aspect of the present invention is defined as follows. That is,
In the computer program specified in the fifth aspect, the computer is further added.
As an exclusion target map specifying means that collates the map data of the same layer with the updated map data and identifies the updated map data that matches the map data as an exclusion target map to be excluded at the time of distribution. Make it work,
The distribution means excludes the specified exclusion target map from the updated map data of all layers to be distributed.
According to the invention of the sixth aspect defined in this way, the same effect as that of the second aspect is obtained.

The recording medium for recording the computer program specified in the fifth or sixth aspect is defined as the seventh aspect.

FIG. 1 is a block diagram showing a configuration of an updated map distribution device 1 according to an embodiment of the present invention. FIG. 2 is a flowchart showing an example of the operation of the updated map distribution device 1 according to the embodiment of the present invention. FIG. 3 is a schematic diagram for explaining the map data stored in the map data storage unit 3. FIG. 4 is composed of FIGS. 4 (A) and 4 (B), and FIG. 4 (A) shows a method of creating updated map data of all layers when update information of each layer exists. ) Is a schematic diagram for explaining a method of creating updated map data of all layers when the updated information of one layer exists. FIG. 5 is a block diagram showing a configuration of an updated map distribution device 21 according to another embodiment of the present invention. FIG. 6 is a block diagram showing a hardware configuration of the updated map distribution device 1. FIG. 7 is a block diagram showing a configuration of a map update system 101 using the update map distribution device 101 according to the embodiment of the present invention. FIG. 8A is a schematic diagram for explaining a map data configuration stored in the server-side map data storage unit 122, and FIG. 8B is a section data for displaying a section X on a map in each layer. It is a schematic diagram for demonstrating. 9 is composed of FIGS. 9A to 9C, and FIG. 9A is a schematic diagram for explaining a map update process executed by the update map data creation unit 123, FIG. 9B. ) Is a schematic diagram showing the distribution data distributed by the distribution unit 125, and FIG. 9C is a schematic diagram for explaining the map data stored in the map data storage unit 132 after the navigation device side is updated.

An updated map distribution device according to an embodiment of the present invention will be described.
FIG. 1 shows a schematic configuration of the updated map distribution device 1. It will be described below with reference to the schematic views shown in FIGS. 3 and 4, as appropriate.
As shown in FIG. 1, the updated map distribution device 1 includes a map data storage unit 3, an update information reception unit 5, an update map data creation unit 7, and a distribution unit 9.
The map data storage unit 3 stores map data having a plurality of hierarchical structures having different scales. For example, as shown in FIG. 3, the first layer map data, the second layer map data, and the third layer map data are provided for drawing the same area. These map data are configured as, for example, a data group obtained by dividing map data nationwide into a mesh at regular distance intervals.
The update information reception unit 5 receives update information for the map data. The updated information is information showing the difference between the latest map data and the previous map data, and is added, deleted, or corrected regarding the links and nodes that make up the map data, or the regulation information, buildings, topography, etc. related to them. Information for doing this is given. Further, the update information may be information for updating the old map data of one layer to the new map data, or information for updating the old map data of two or more layers to the new map data. Is also good. Examples of such update information include difference data in which differences between map data are expressed in a binary format. Further, the update information may include information regarding the update date and time, the hierarchy, the generation, and the like.

The updated map data creating unit 7 creates updated map data of all layers from the map data stored in the map data storage unit 3 based on the updated information received by the updated information receiving unit 5. Here, the updated map data may be any data as long as the old map data can be updated to the new map data, and examples thereof include updated mesh data and difference data between the old map data and the new map data. As one of the methods for creating the updated map data of all the layers, if the updated information for updating the old map data to the updated map data exists corresponding to all the layers, the layer is based on the updated information. The old map data of all levels is updated to the new map data every time (see FIG. 4 (A)). Alternatively, if the update information for updating the old map data to the update map data exists only for a specific hierarchy, the update map data is created from the old map data of the corresponding hierarchy based on the update information. Then, by reflecting the updated contents of the created updated map data in the old map data of other layers, the updated map data of all layers can be created (see FIG. 4B). Such updated map data can be created for each mesh in which the updated information exists.
The distribution unit 9 distributes the update map data of all layers created by the update map data creation unit 7 to a navigation device (not shown). The distribution unit 9 can distribute, for example, the updated map data of all layers corresponding to the national map including the updated mesh. As another example, the distribution unit 9 may distribute only the updated map data corresponding to the mesh updated for all layers. In addition, when the area indicated by the updated map data corresponding to the updated mesh is different for each layer, the data set so that the area is the same for all layers is delivered by combining the meshes that have not been updated. You may.

An example of the operation of the updated map distribution device 1 shown in FIG. 1 will be described with reference to FIG. In this example, the update information receiving unit 5 shall receive the difference data for updating the first layer map data to the latest map data.
In step 1 (S1) as the update information reception step, the update information reception unit 5 accepts input of difference data and layer information as update information for the first layer map data. For example, input of difference data that enables updating of the map data of the first layer is accepted.
In step 3 (S3) as the update map data creation step, the update map data creation unit 7 refers to the map data storage unit 3 and maps the hierarchy corresponding to the hierarchy information received in step 1 (S1). Select data. In this example, the map data of the first layer is selected.
In step 5 (S5) as the update map data creation step, the update map data creation unit 7 is from the map data selected in step 3 (S3) based on the difference data input and accepted in step 1 (S1). Create updated map data. In this example, the updated map data of the first layer is created.
In step 7 (S7) as the update map data creation step, the update map data creation unit 7 creates update map data of another layer based on the update map data created in step 5 (S5).
In step 9 (S9) as a distribution step, the distribution unit 9 distributes the updated map data of all the first to third layers created in steps 5 (S5) and 7 (S7) to the navigation device.

FIG. 5 shows the updated map distribution device 21 of another embodiment. In FIG. 5, the same elements as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be partially omitted.
FIG. 5 shows the updated map distribution that can reduce the distribution data size by specifying the updated map data of the layer that matches the map data before the update as the target of distribution among the updated map data of all layers. Device 21. That is, in the device 1 shown in FIG. 1, the device 21 further includes a storage unit 23 and an exclusion target map identification unit 25, and includes a distribution unit 27 in place of the distribution unit 9.
The exclusion target map identification unit 25 refers to the storage unit 23 and the map data storage unit 3 in which the update map data created by the update map data creation unit 7 is stored, and obtains the map data and the update map data of the same layer. Collate and identify the updated map data that matches the map data before the update as the excluded map to be excluded at the time of distribution.
The distribution unit 27 refers to the storage unit 23 and the exclusion target map identification unit 25, and distributes the update map data excluding the exclusion target map and the update map data of the specified layer among the update map data of all layers to the navigation device. do.

FIG. 6 is a block diagram showing a hardware configuration of the updated map distribution device 1.
The hardware configuration of the device 1 is the same as that of a general computer system, in which various elements are coupled to the central control device 221 via the system bus 222.
The central control device 221 includes a general-purpose CPU, a memory control device, a bus control device, an interrupt control device, and a DMA (direct memory access) device, and the system bus 222 also includes a data line, an address line, and a control line. A memory circuit composed of a RAM (random access memory) 223 and a non-volatile memory (ROM224, CMOS-RAM225, etc.) is connected to the system bus 222. The data stored in the RAM 223 is read or rewritten by the central controller 221 or other hardware elements. The data in the non-volatile memory is read-only and is not lost when the device is turned off. The system program that controls this hardware is stored in the hard disk device 227, is stored in the RAM 223, and is appropriately read into the central control device 221 via the disk drive control device 226 and used. The hard disk device 227 secures an area for storing a computer program for operating a computer system having a general-purpose configuration as the update map distribution device 1.

A predetermined area of the hard disk device 227 is allocated for a storage unit for storing information created by the update information reception unit 5 and the update map data creation unit 7.
Another area of the hard disk device 227 is allocated for the storage unit 3 for storing the map data.
A flexible drive control device 231 that reads and writes data to the flexible disk 232 and a CD / DVD control device 233 that reads data from the compact disk 234 are connected to the system bus 222. In this example, the printer 238 is connected to the printer interface 237.
A keyboard / mouse control device 241 is connected to the system bus 222, and data can be input from the keyboard 242 and the mouse 243. The monitor 245 is connected to the system bus 222 via the monitor control device 244. A CRT type, a liquid crystal type, a plasma display type, or the like can be used for the monitor 245.
An empty slot 251 is prepared to enable the addition of various elements (modem, etc.).

Programs (OS programs, application programs (including those of the present invention)) necessary for operating the updated map distribution device 1 composed of this computer system are installed in the system via various recording media. For example, it can be installed in the form of a communication medium using a non-writable recording medium (CD-ROM, ROM card, etc.), a writable recording medium (FD, DVD, etc.), and network N. Of course, these programs can be written in advance in the non-volatile memory 224, 225 or the hard disk device 227.

The updated map distribution device can function as a map updating system together with a navigation device connected via the Internet or the like.
FIG. 7 shows a schematic configuration of the map update system 101.
As shown in FIG. 7, the map update system 101 includes a server device 102 as an update map distribution device, a first navigation device 103, and second to n navigation devices (M2 to Mn), and is a server. The device 102 and each navigation device are wirelessly connected to each other via the Internet N.
The first navigation device 103 is a communication terminal device that can be carried by a user, and is, for example, a mobile phone, a PDA (Portable Digital Assistants), a portable game machine, a notebook PC, a PND (Portable Navigation Device), a smartphone, and a head. It may be a wearable device or the like that can be worn on the arm or the like.

The server device 102 includes a receiving unit 121, a server-side map data storage unit 122, an updated map data creating unit 123, a storage unit 124, and a distribution unit 125.
The server-side receiving unit 121 receives update information for updating the old map data to the latest map data. The server-side receiving unit 121 receives, for example, update information in binary format. In this example, for example, it is assumed that binary difference data for updating the old map data of the first layer to the latest map data is received.
Map data of each layer is stored in the server-side map data storage unit 122. The map data includes division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and management data for designating the division data to be referred to at the time of drawing. .. FIG. 8A shows an example of the map data structure stored in the server-side map data storage unit 122. As shown in FIG. 8A, the map data includes management data and division data. In this example, the management data (A) is stored in the management data area. Further, the partition data of each layer is stored in the other area of the storage unit 122. Specifically, as shown in FIG. 8B, first-tier partition data C1, C2, C3, C4, C5, C6, C7, C8, C9, for displaying the partition X at the first scale. The second layer partition data D1, D2, D3, D4 for displaying at the second scale, and the third layer partition data E1 for displaying at the third scale are stored. The division data can be, for example, data obtained by dividing map data nationwide into a mesh at regular distance intervals. The management data specifies the division data for displaying each mesh according to the display scale when the map is displayed.

The updated map data creating unit 123 creates each updated map data from the map data of the first to third layers with reference to the receiving unit 121 and the server-side map data storage unit 122. An example of a method of creating updated map data will be described with reference to FIG. As shown in FIG. 9A, the updated map data creating unit 123 has binary difference data (difference C2 and difference) for updating the section data C2 and C3 of the old map data of the first layer received by the receiving unit 121. Based on C3), updated partition data C2'and C3'are created from the partition data C2 and C3, respectively. Then, based on the update partition data C2'and C3', the partition data D1 and D2 of the old map data of the second layer corresponding to the update partition data C2'and C3' are updated, and the update partitions are respectively. Data D1'and D2' are created. Further, the updated section data E1'is created from the section data E1 of the old map data of the third layer by the same method. Further, it is preferable that the updated map data creating unit 123 updates the management data so as to specify the section data of the new map data instead of the section data of the old map data when displaying the updated section on the map. As another example, the update map data creation unit 123 has updated partition data (D1, D2, E1) from the partition data (D1, D2, E1) before the update based on the update partition data C2'and C3', or the difference C2 and the difference C3. The difference data (difference D1, difference D2, and difference E1) for creating the above may be generated.
As shown in FIG. 9B, the distribution unit 125 uses the updated map data (A', C2', C3', D1', D2', E1') created by the updated map data creating unit 123 as a navigation device. Deliver to 103. The distribution unit 125 can distribute, for example, compressed data obtained by compressing each created updated map data into one. As described above, when each difference data (difference D1, difference D2 and difference E1) is generated by the update map data creation unit 123, the distribution unit 125 has all the difference data (difference) that can update all layers. C2, difference C3, difference D1, difference D2 and difference E1) can be delivered.

The navigation device 103 includes a receiving unit 131, a navigation-side map data storage unit 132 (see FIG. 9C), and an updating unit 133.
The receiving unit 131 receives the updated map data distributed by the distribution unit 125 from the server device 102.
The navigation-side map data storage unit 132 stores the same map data as the server-side map data storage unit 122 before the update.
The update unit 133 includes a management data update unit 134 and a partition data update unit 135.

The management data update unit 134 refers to the reception unit 131 and the map data storage unit 132, and stores the received updated management data (A') in an area in which the management data before the update is stored (that is, the management data (that is, the management data (that is,)). Write in an area different from the area) in A).
The partition data update unit 135 refers to the reception unit 131 and the map data storage unit 132, and converts the received updated partition data (C2', C3', D1', D2', E1') into the partition before the update. The data (C2, C3, D1, D2, E1) is written in an area different from the stored area.

As described above, both the update units 134 and 135 specify an area different from the area in which the data before the update is stored when writing both the updated data, as shown in FIG. 9 (C). Pre-update data (A, C2, C3, D1, D2) corresponding to the updated data (A', C2', C3', D1', D2', E1') in the updated map data storage unit 132. , E1) will coexist.
When the section X is displayed on the map at the first scale using the updated map data, the updated management data (A') uses the updated section data C2'and C3'instead of the section data C2 and C3. In the case of the second scale, the updated partition data D1'and D2'are specified instead of the partition data D1 and D2, and in the case of the third scale, the updated partition data is replaced with the partition data E1. Specify E1'. Then, when a problem occurs in the post-update partition data, the pre-update management data (A) functions in place of the post-update management data (A'), and the pre-update management is performed when the data is displayed at the first scale. The data (A) does not specify the updated division data (C2', C3'), but specifies the division data C1 to C9, and displays the map corresponding to the division X. According to the map update system of the present invention, since the map data storage unit 132 in the navigation device 103 also retains the partition data before the update, even if a problem occurs in the updated data, before the update. The map can be displayed continuously by switching to the data of.

Although the embodiments and examples of the present invention have been described above, two or more embodiments (examples) may be combined and carried out. Alternatively, one of these embodiments (Examples) may be partially implemented. Further, among these, two or more embodiments (examples) may be partially combined and carried out.

The present invention is not limited to the description of the embodiments and examples of the above invention. Various modifications are also included in the present invention to the extent that those skilled in the art can easily conceive without departing from the description of the scope of claims.
The following matters will be disclosed.
(1)
A map update system including a navigation device and an update map distribution device that distributes update map data to the navigation device.
The updated map distribution device is
A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales, and
An update information reception unit that receives update information for the map data,
By creating the updated map data from the map data based on the updated information received by the update information receiving unit, and / or transferring the updated information of the updated map data in one layer to another layer. An updated map data creation unit that creates the updated map data for all levels by reflecting it in the map data.
A distribution unit that distributes the updated map data of all layers created by the updated map data creation unit to the navigation device, and a distribution unit.
The map data in the same layer is collated with the updated map data, and the updated map data that matches the map data is specified as an exclusion target map to be excluded at the time of distribution by the distribution unit. With a department,
The update information is binary data indicating the difference between the latest map data and the previous map data.
The distribution unit distributes the updated map data of all layers by excluding the exclusion target map specified by the exclusion target map identification unit.
The navigation device is
A receiving unit that receives the updated map data distributed from the updated map distribution device, and
A second map data storage unit in which the map data similar to the first map data storage unit is stored, and a second map data storage unit.
The second map data storage unit is provided with an update unit for updating the map data to the update map data.
Each of the map data and the updated map data is a division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and a management for designating the division data when displaying the map. Have data and
The management data before the update can specify the partition data of all layers before the update, and can be specified.
The map update system is characterized in that the management data after the update can specify the section data of all the layers before the update and the section data of all the updated layers.
(2)
Described in (1), when the update map data is written to the second map data storage unit, the update unit designates an area different from the area in which the map data before the update is stored and writes the update map data. Map update system.
(3)
The update unit includes a management data update unit that writes the updated management data to the second map data storage unit, and a partition data update unit that writes the updated partition data to the second map data storage unit. The map update system according to (1) or (2).
(4)
How to update the map for navigation,
The updated map data creation step of updating the map data having a plurality of layers with different scales stored in the first map data storage unit based on the updated data to create the updated map data, and
An exclusion target map identification step for collating the map data in the same layer with the updated map data and specifying the excluded target map to be excluded and the excluded target map specifying step that matches the map data.
The updated map of all layers except the exclusion target map specified in the exclusion target map identification step for the map data of the second map data storage unit in which the same map data as the first map data storage unit is stored. The map data and the updated map data are provided with an update step for updating to data, and each of the map data and the map display corresponds to each section for drawing a navigation map divided into a plurality of sections for each layer. It has management data that specifies the partition data at the time of
The management data before the update can specify the partition data of all layers before the update, and can be specified.
The map update method, wherein the management data after the update can specify the partition data of all the layers before the update and the partition data of all the updated layers.
(5)
A map update system equipped with a server device and a navigation device.
The server device is
A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales, and
An updated map data creation unit that updates the map data based on the updated data and creates updated map data for all levels.
The distribution unit distributes the updated map data that matches the map data by collating the updated map data with the distribution unit that distributes the updated map data to the navigation device and the map data in the same layer with the updated map data. It is equipped with an exclusion target map to be excluded and an exclusion target map identification part to be specified.
The distribution unit distributes the updated map data of all layers by excluding the exclusion target map specified by the exclusion target map identification unit.
The navigation device is
A receiving unit that receives the updated map data distributed from the server device, and
A second map data storage unit similar to the first map data storage unit in which the map data is stored, and an update unit for updating the map data in the second map data storage unit to the updated map data. Prepare,
Each of the map data and the updated map data is a division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and a management for designating the division data when displaying the map. Have data and
The management data before the update can specify the partition data of all layers before the update, and can be specified.
The map update system is characterized in that the management data after the update can specify the section data of all the layers before the update and the section data of all the updated layers.
(6)
In the second map data storage unit, the update unit has the management data after the update and the partition data after the update in an area different from the area where the management data before the update and the partition data before the update are stored. The map update system described in (5).
(7)
It is a server device for the map update system.
The server device is
A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales, and
An updated map data creation unit that updates the map data based on the updated data and creates updated map data for all levels.
The distribution unit distributes the updated map data that matches the map data by collating the updated map data with the distribution unit that distributes the updated map data to the navigation device and the map data in the same layer with the updated map data. It is equipped with an exclusion target map to be excluded and an exclusion target map identification part to be specified.
The distribution unit distributes the updated map data of all layers by excluding the exclusion target map specified by the exclusion target map identification unit.
The management data before the update can specify the partition data of all layers before the update, and can be specified.
A server device for a map update system, wherein the management data after the update can specify the partition data of all the layers before the update and the partition data of all the updated layers.
(8)
A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales, and
An updated map data creation unit that updates the map data based on the updated data and creates updated map data for all levels.
The distribution unit distributes the updated map data that matches the map data by collating the updated map data with the distribution unit that distributes the updated map data to the navigation device and the map data in the same layer with the updated map data. It is equipped with an exclusion target map to be excluded and an exclusion target map identification part to be specified.
The distribution unit is a navigation device for a map update system including a server device that distributes data excluding the exclusion target map specified by the exclusion target map identification unit from the update map data of all layers.
The navigation device is
A receiving unit that receives the updated map data distributed from the server device, and
A second map data storage unit similar to the first map data storage unit in which the map data is stored, and an update unit for updating the map data in the second map data storage unit to the updated map data. Prepare,
Each of the map data and the updated map data is a division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and a management for designating the division data when displaying the map. Have data and
The management data before the update can specify the partition data of all layers before the update, and can be specified.
A navigation device for a map update system, wherein the management data after the update can specify the partition data of all the layers before the update and the partition data of all the updated layers.

1,21 Update map distribution device 3 Map data storage unit 5 Update information reception unit 7 Update map data creation unit 9,27 Distribution unit 25 Exclusion target map identification unit

Claims (9)

It is an updated map distribution device that distributes updated map data to the navigation device.
A map data storage unit that stores map data having multiple hierarchical structures with different scales,
An update information reception unit that receives update information for the map data,
The update map data is created from the map data for each layer based on the update information received by the update information reception unit, or the update of one layer is based on the update information received by the update information reception unit. An updated map data creation unit that creates the updated map data of all layers by reflecting the updated information of the map data in the map data of other layers.
A distribution unit that distributes the updated map data created by the updated map data creation unit to the navigation device, and a distribution unit.
Equipped with
Each of the map data and the updated map data is a division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and a management for designating the division data when displaying the map. Have data and
The management data before the update can specify the partition data of all layers before the update, and can be specified.
The updated map distribution device can specify the section data of all the layers before the update and the section data of all the updated layers as the management data after the update. A storage unit that stores the updated map data created by the updated map data creation unit, and a storage unit that stores the updated map data.
The map data of the same layer and the updated map data should be collated with reference to the storage unit and the map data storage unit, and the updated map data matching the map data before the update should be excluded at the time of distribution. Further equipped with an exclusion target map and an exclusion target map identification part,
The updated map distribution device according to claim 1, wherein the distribution unit distributes the updated map data excluding the exclusion target map to the navigation device. The receiver that receives the updated map data and
A map data storage unit that stores map data and
The map data storage unit is provided with an update unit for updating the map data to the update map data.
Each of the map data and the updated map data is a division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and a management for designating the division data when displaying the map. Have data and
The management data before the update can specify the partition data of all layers before the update, and can be specified.
The navigation device after the update can specify the partition data of all the layers before the update and the partition data of all the updated layers as the management data after the update. The navigation according to claim 3 , wherein when the updated map data is written to the map data storage unit, the update unit designates an area different from the area in which the map data before the update is stored and writes the updated map data. Device. 3. The update unit includes a management data update unit that writes the updated management data to the map data storage unit, and a partition data update unit that writes the updated partition data to the map data storage unit. Or the navigation device according to claim 4. The map data storage unit is switched to the management data before the update instead of the management data after the update when a problem occurs in the management data after the update or the division data after the update when the map is displayed. The navigation device according to claim 5. The receiver that receives the updated map data and
A map data storage unit that stores map data and
The map data storage unit is provided with an update unit for updating the map data to the update map data.
Each of the map data and the updated map data is a division data corresponding to each division for drawing a navigation map divided into a plurality of divisions for each layer, and a management for designating the division data when displaying the map. Have data and
In a state where the map data of the map data storage unit is updated with the updated map data, the map data storage unit includes pre-update section data and updated section data that can be drawn in the same section as the section data. Coexist,
The management data of the map data storage unit is a navigation device, wherein either the pre-update section data or the update section data can be individually specified in the same section. The map data storage unit is switched to the management data before the update instead of the management data after the update when a problem occurs in the management data after the update or the division data after the update when the map is displayed. The navigation device according to claim 7. The navigation device according to claim 7 or 8, wherein the management data can also specify the division data drawn in a division of any layer of the map data.

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