JP2007132712A - Navigation device, map server, map update system, map update method, and map update program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation device selecting update data for updating navigation map data according to a travel history to shorten communication time for communicating update data, and to provide a map server, a map update system, a map update method, and a map update program. <P>SOLUTION: This navigation device is equipped with a communication means for receiving an update file from a map server for updating a section file of navigation map data and an update means for updating the map data by using the update file. An update area is set for each of partial routes set according to road assortments as to traveling history routes. The update file is selected from among server files of server map data managed for each of road update levels corresponding to updated road assortments and satisfies a file determination attribute for stipulating an update object road assortment updated in a section file according to the road assortment of a partial route. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a navigation device, a map server, a map update system, a map update method, and a map update program for updating map data of a navigation device.

Conventionally, when a navigation device updates map data, it is known to acquire a file of a changed portion of an update target area set according to a travel history from a map center or the like and update the map data (for example, Patent Document 1).
However, in the update process that uniformly acquires the changed part of the update target area from the map center, when the update target area is wide or the update target area is long, the update that the navigation device acquires from the map center by communication There is a problem that the amount of data increases and the communication time becomes long.

Further, Patent Document 2 discloses a navigation device that classifies a road data included in mesh data into an area for acquiring data including all roads and an area for acquiring data including only main roads to acquire update data. Is disclosed.
However, in Patent Document 2, all road data included in mesh data is acquired in an area where map data is updated by acquiring data including all roads. As a result, when the area for acquiring data including all roads is large, there is a problem that the amount of update data acquired by communication by the navigation device increases and the communication time becomes longer.

JP 2003-121371 A JP 2003-75174 A

  The present invention has been made in order to solve the above-described problem, and selects update data for updating navigation map data according to a travel history, and shortens the communication time for communicating the update data. An object is to provide an update system, a map update method, and a map update program.

  (1) A navigation device for achieving the above object is divided into a plurality of sections in a navigation device in which a map server that manages server map data updates navigation map data using an update file acquired from the server map data. Communication means for receiving the update file for updating a section file corresponding to each section of the navigation map data from the map server, and update means for updating the navigation map data by the update file, The update file corresponds to the road type updated in the section corresponding to each section file in the update range set for each partial path of the travel history path set according to the road type on the travel history path. The server map data managed for each road update level Of it is selected from the server file, and satisfies the file determination attribute that defined according to the road type of the update target road type of the partial path to be updated in the partition file.

  In this configuration, the partial route is set according to the road type on the travel history route obtained as a result of searching for the travel route to the destination or having traveled in the past, and the update range set for each partial route is set. An update file for updating the section file is acquired according to the road type of the partial route. Therefore, the data amount of the update file can be reduced compared to the case where the update file is uniformly acquired regardless of the road type of the travel history route. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, the total data amount of the update file for updating the navigation map data is reduced, so that the communication time of the update file received by the navigation device from the map server is reduced. Furthermore, the load on the navigation device that updates the navigation map data by the received update file is reduced.

(2) The navigation device may further include a partial route setting unit that sets the partial route, an update range setting unit that sets the update range, and a file attribute setting unit that sets the file determination attribute. .
Based on the travel history route information managed on the navigation device side, the navigation device sets the partial route, sets the update range, sets the file determination attribute, and the data between the navigation device and the map server The amount of communication can be reduced.

(3) The map server sets the partial route, sets the update range, sets the file determination attribute, and corresponds to the road update level of the server file corresponding to the section file of the update range. A file attribute to be compared with the file determination attribute to determine whether or not the partition file in the update range needs to be updated, and update the partition file determined to be updated according to the determination result, the file determination attribute The update file to be satisfied may be selected from the server file.
By executing these processes not by the navigation device but by the map server, the processing load on the navigation device required for updating the navigation map data is reduced.

  (4) A navigation device for achieving the above object is divided into a plurality of sections in a navigation device in which a map server that manages server map data updates navigation map data with an update file acquired from the server map data. A reference point setting unit for setting a reference point for updating the navigation map data having a partition file corresponding to a partition, a communication unit for receiving the update file for updating the partition file from the map server, and the update Updating means for updating the navigation map data by a file, the update file depending on a distance between each travel history route group obtained by classifying a travel history route according to the number of travels and the reference point. An update range set in a different range around the reference point. The update target road type to be updated in the partition file is selected from the server file of the server map data managed for each road update level corresponding to each partition file and corresponding to the road type updated in the partition. A file determination attribute defined according to the number of travels corresponding to the update range is satisfied.

  In this configuration, the travel history route obtained as a result of searching for the travel route to the destination or having traveled in the past is classified into the travel history route group according to the number of travels, and the distance between the travel history route group and the reference point is determined. Accordingly, the update range is set to a different range around the reference point. And since the road type to be updated in the section file of the update range is set according to the number of travels corresponding to the update range, compared to the case where the update file is uniformly acquired regardless of the number of travels of the travel history route, The amount of data in the update file can be reduced. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, the total data amount of the update file for updating the navigation map data is reduced, so that the communication time of the update file received by the navigation device from the map server is reduced. Furthermore, the load on the navigation device that updates the navigation map data by the received update file is reduced.

Here, the number of times traveled on the travel history route is not limited to the number of times traveled on the travel history route, but may be the number of times the travel route to the destination has been searched.
The distance between the travel history route group and the reference point may be set as appropriate. For example, the distance between the farthest point farthest from the reference point in the travel history route of the travel history route group and the reference point may be used. The average distance from the reference point to the farthest point of all the travel history routes in each travel history route group may be used.

(5) The navigation device includes: a classifying unit that classifies the travel history route into the travel history route group; an update range setting unit that sets the update range; and a file attribute setting unit that sets the file determination attribute. Further, it may be provided.
Based on the travel history route information managed on the navigation device side, the navigation device classifies the travel history route into the travel history route group, sets the update range, and sets the file determination attribute, so that the navigation device and the map The amount of data communication with the server can be reduced.

(6) The map server classifies the travel history route into the travel history route group, sets the update range, sets the file determination attribute, and the server file corresponding to the partition file in the update range. The file attribute corresponding to the road update level is compared with the file determination attribute to determine whether or not the partition file in the update range needs to be updated, and the partition file determined to be updated based on the determination result is updated. The update file that satisfies the file determination attribute may be selected from the server file.
By executing these processes not by the navigation device but by the map server, the processing load on the navigation device required for updating the navigation map data is reduced.

(7) Furthermore, the number of types of the update target road types specified by the file determination attribute may be larger in the update range where the number of travels is larger.
As the number of times traveled on the travel history route increases, the user who uses the navigation device has traveled or wants to travel within the update range that includes the travel history route, so by providing more detailed map data, The navigation map data can be updated according to the convenience of the user.

(8) The server file of the server map data of the version after the reference version may be a difference file from the immediately previous version.
The server map data server file corresponding to the navigation map data section is managed as a difference file from the previous version instead of all the difference files from the reference version of the server map data. By comparing the update information between the file and the difference file of the server map data, only the version of the difference file necessary for updating the partition file can be used as the update file. Therefore, the data amount of the update file for updating the navigation map data can be reduced as much as possible.

  (9) A map server for achieving the above object is a map server in which a navigation device acquires an update file for updating navigation map data from server map data, and is divided into a plurality of sections and corresponds to each section An acquisition means for acquiring the update file for updating the navigation map data having a file from the server map data; and a communication means for transmitting the update file to the navigation device, wherein the update file is a travel history route. In the update range set for each partial route of the travel history route set according to the road type above, it is managed for each road update level corresponding to each zone file and corresponding to the road type updated in the zone. Selected from a server file of the server map data, and And it satisfies the file determination attribute that specifies in accordance with updated road type to be updated to the road type of the partial path in the file.

  In this configuration, the partial route is set according to the road type on the travel history route obtained as a result of searching for the travel route to the destination or having traveled in the past, and the update range set for each partial route is set. An update file for updating the section file is acquired according to the road type of the partial route. Therefore, the data amount of the update file can be reduced compared to the case where the update file is uniformly acquired regardless of the road type of the travel history route. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, the total data amount of the update file for updating the navigation map data is reduced, so that the communication time of the update file received by the navigation device from the map server is reduced. Furthermore, the load on the navigation device that updates the navigation map data by the received update file is reduced.

  (10) A map server for achieving the above object is a map server in which a navigation device acquires an update file for updating navigation map data from server map data, and is divided into a plurality of sections and corresponds to each section An update unit for acquiring the update file for updating the navigation map data having a file from the server map data; and a communication unit for transmitting the update file to the navigation device. In accordance with the distance between each travel history route group obtained by classifying the travel history route according to the reference point and an update range that is set to a different range around the reference point, the partition corresponding to each partition file Before being managed for each road update level corresponding to the road type updated in It is selected from a server file of the server map data, and satisfies the file determination attribute that specifies in accordance with updated road type to be updated in the partition file to the number of running times corresponding to the update range.

  In this configuration, the travel history route obtained as a result of searching for the travel route to the destination or having traveled in the past is classified into the travel history route group according to the number of travels, and the distance between the travel history route group and the reference point is determined. Accordingly, the update range is set to a different range around the reference point. And since the road type to be updated in the section file of the update range is set according to the number of travels corresponding to the update range, compared to the case where the update file is uniformly acquired regardless of the number of travels of the travel history route, The amount of data in the update file can be reduced. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, the total data amount of the update file for updating the navigation map data is reduced, so that the communication time of the update file received by the navigation device from the map server is reduced. Furthermore, the load on the navigation device that updates the navigation map data by the received update file is reduced.

  (11) A map update system for achieving the above object is a map update system for updating navigation map data with an update file acquired from server map data. A partial route setting means for setting a partial route; an update range setting means for setting an update range for each partial route; and a portion corresponding to the update range for a road type to be updated in the section file of the update range. File attribute setting means for setting a file determination attribute defined according to the road type of the route, and management for each road update level corresponding to the road type updated in the section corresponding to the section file in the update range File corresponding to the road update level of the server map data of the server map data Determination means for comparing the file determination attribute with the file determination attribute and determining whether or not the partition file in the update range needs to be updated, and the file determination attribute for updating the partition file determined by the determination means to be updated Selection means for selecting an update file satisfying the condition from the server file, acquisition means for acquiring the update file selected by the selection means from the server map data, and transmission for transmitting the update file acquired by the acquisition means Means, receiving means for receiving the update file transmitted from the transmitting means, and updating means for updating the navigation map data with the update file received by the receiving means.

  In this configuration, the partial route is set according to the road type on the travel history route obtained as a result of searching for the travel route to the destination or having traveled in the past, and the update range set for each partial route is set. An update file for updating the section file is acquired according to the road type of the partial route. Therefore, the data amount of the update file can be reduced compared to the case where the update file is uniformly acquired regardless of the road type of the travel history route. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, since the total data amount of the update file for updating the navigation map data is reduced, the communication time of the update file is reduced. Further, the update load for updating the navigation map data by the received update file is reduced.

  (12) A map update system for achieving the above object is a map update system for updating navigation map data with an update file acquired from server map data, and has a partition file divided into a plurality of partitions and corresponding to each partition. A reference point setting means for setting a reference point for updating the navigation map data, a classification means for classifying the travel history route into a travel history route group according to the number of travels, and a distance between the reference point and each travel history route group. Accordingly, an update range setting means for setting an update range in a different range centering on the reference point, and an update target road type to be updated in the section file of the update range are defined according to the number of travels corresponding to the update range. File attribute setting means for setting a file determination attribute to be performed, and the partition file in the update range The file attribute corresponding to the road update level of the server file of the server map data managed for each road update level corresponding to the road type correspondingly updated in the section is compared with the file determination attribute, A selection unit that determines whether or not the partition file in the update range needs to be updated, and a selection that updates the partition file that is determined to be updated by the determination unit and that selects an update file that satisfies the file determination attribute from the server file Means, acquisition means for acquiring the update file selected by the selection means from the server map data, transmission means for transmitting the update file acquired by the acquisition means, and the update transmitted from the transmission means A receiving means for receiving a file, and the update file received by the receiving means. And updating means for updating the Geshon map data, characterized in that it comprises a.

  In this configuration, the travel history route obtained as a result of searching for the travel route to the destination or having traveled in the past is classified into the travel history route group according to the number of travels, and the distance between the travel history route group and the reference point is determined. Accordingly, the update range is set to a different range around the reference point. And since the road type to be updated in the section file of the update range is set according to the number of travels corresponding to the update range, compared to the case where the update file is uniformly acquired regardless of the number of travels of the travel history route, The amount of data in the update file can be reduced. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, since the total data amount of the update file for updating the navigation map data is reduced, the communication time of the update file is reduced. Further, the update load for updating the navigation map data by the received update file is reduced.

  (13) A map update method for achieving the above object is a map update method in which a map server that manages server map data updates navigation map data using an update file acquired from the server map data, and is divided into a plurality of sections. A communication stage for receiving the update file for updating a section file corresponding to each section of the navigation map data, and an update stage for updating the navigation map data with the update file. In the update range set for each partial route of the travel history route set according to the road type on the travel history route, the update file is updated to the road type updated in the partition corresponding to each partition file. Server of the server map data managed for each corresponding road update level Is selected from Airu, wherein the updated road type to be updated in the partition file satisfying a file determination attribute that defined according to the road type of the partial path.

  In this update method, a partial route is set according to the road type on the travel history route obtained as a result of searching for a travel route to the destination, or the update range set for each partial route. An update file for updating the section file is acquired according to the road type of the partial route. Therefore, the data amount of the update file can be reduced compared to the case where the update file is uniformly acquired regardless of the road type of the travel history route. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, since the total data amount of the update file for updating the navigation map data is reduced, the communication time of the update file received from the map server is reduced. Further, the update load for updating the navigation map data by the received update file is reduced.

  (14) A map update method for achieving the above object is a map update method in which a map server that manages server map data updates navigation map data using an update file acquired from the server map data, and is divided into a plurality of sections. A reference point setting step for setting a reference point for updating the navigation map data having a partition file corresponding to each partition, and a communication step of receiving the update file for updating the partition file from the map server, Updating the navigation map data with the update file, and the update file includes a distance between each travel history route group obtained by classifying a travel history route according to the number of travels and the reference point. In the update range that is set to a different range centered on the reference point according to The update target road type to be updated in the partition file is selected from the server file of the server map data managed for each road update level corresponding to each partition file and corresponding to the road type updated in the partition. A file determination attribute defined in accordance with the number of times of travel corresponding to the above is satisfied.

  In this update method, a travel history route obtained as a result of searching for a travel route to the destination or having traveled in the past is classified into a travel history route group according to the number of travels, and the distance between the travel history route group and the reference point Accordingly, the update range is set to a different range around the reference point. And since the road type to be updated in the section file of the update range is set according to the number of travels corresponding to the update range, compared to the case where the update file is uniformly acquired regardless of the number of travels of the travel history route The amount of data in the update file can be reduced. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, since the total data amount of the update file for updating the navigation map data is reduced, the communication time of the update file received from the map server is reduced. Further, the update load for updating the navigation map data by the received update file is reduced.

  (15) A map update program for achieving the above object is divided into a plurality of sections in a map update program in which a map server that manages server map data updates navigation map data by an update file acquired from the server map data. A communication stage means for receiving the update file for updating the section file corresponding to each section of the navigation map data, and a computer functioning as an update means for updating the navigation map data with the update file. The update file is a road type updated in the section corresponding to each section file in an update range set for each partial path of the travel history path set according to a road type on the travel history path. Is managed for each road update level corresponding to Wherein is selected from the server file of the server map data, wherein the updated road type to be updated in the partition file satisfying a file determination attribute that defined according to the road type of the partial path.

  In this update program, a partial route is set according to the road type on the travel history route obtained as a result of searching for a travel route to the destination, or the update range set for each partial route. An update file for updating the section file is acquired according to the road type of the partial route. Therefore, the data amount of the update file can be reduced compared to the case where the update file is uniformly acquired regardless of the road type of the travel history route. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, since the total data amount of the update file for updating the navigation map data is reduced, the communication time of the update file received from the map server is reduced. Further, the update load for updating the navigation map data by the received update file is reduced.

  (16) A map update program for achieving the above object is divided into a plurality of sections in a map update program in which a map server that manages server map data updates navigation map data with an update file acquired from the server map data. A reference point setting means for setting a reference point for updating the navigation map data having a section file corresponding to each section; a communication means for receiving the update file for updating the section file from the map server; The computer functions as an updating means for updating the navigation map data by the update file, and the update file is a distance between each travel history route group obtained by classifying a travel history route according to the number of travels and the reference point. Depending on the reference point Is selected from the server map data of the server map data managed for each road update level corresponding to each section file and corresponding to the road type updated in the section, and updated in the section file. A file determination attribute that defines an update target road type according to the number of travels corresponding to the update range is satisfied.

  In this update program, the travel history routes obtained as a result of searching in the past or searching for the travel route to the destination are classified into travel history route groups according to the number of travels, and the distance between the travel history route group and the reference point Accordingly, the update range is set to a different range around the reference point. And since the road type to be updated in the section file of the update range is set according to the number of travels corresponding to the update range, compared to the case where the update file is uniformly acquired regardless of the number of travels of the travel history route, The amount of data in the update file can be reduced. Furthermore, since the update file is selected from the server file corresponding to each section file managed for each road update level corresponding to the road type updated in the section of the navigation map data, the road to be updated in the section file of the navigation map data Even when the type is all roads, not all the road update level server files corresponding to the section file are selected, but the road update level server file corresponding to the road type updated in the section is an update file. Selected as. As a result, since the total data amount of the update file for updating the navigation map data is reduced, the communication time of the update file received from the map server is reduced. Further, the update load for updating the navigation map data by the received update file is reduced.

  The functions of the plurality of means provided in the present invention are realized by hardware resources whose functions are specified by the configuration itself, hardware resources whose functions are specified by a program, or a combination thereof. Further, the functions of the plurality of means are not limited to those realized by hardware resources that are physically independent of each other. Further, the order of the operations of the method and the program described in the claims is not limited to the order of description unless there is a technical impediment, and may be executed in any order, and may be executed simultaneously. May be.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing a hardware configuration of a map update system 10 including a navigation device 20 and a center 60 as a map server according to the first embodiment of the present invention.

(Hardware configuration)
The navigation device 20 is mounted on a vehicle such as an automobile or a motorcycle. The navigation device 20 guides the recommended route to the destination point and the traveling point of the vehicle. The interface 22 includes an AD converter, a DA converter, and the like. The interface 22 converts a signal form between the navigation processing unit 50 in the navigation apparatus 20 and each block, and a communication signal form with the center 60 via the communication unit 24. Perform conversion.

  The hard disk device (HDD) 30 includes a map database (map DB 70, see FIG. 2) as navigation map data, and travel history route information obtained by searching a travel route to a destination that has traveled in the past. The travel history information 74, passing section / road history information 76 (hereinafter simply referred to as road history information 76), update management information 78 (see FIG. 2) of the map DB 70, and various program modules 82 (see FIG. 7) of the navigation device 20 are included. The application DB 84 (see FIG. 7) to be used is stored.

The direction sensor 32 includes a geomagnetic sensor, a left and right wheel speed difference sensor, a vibration gyro, a gas rate gyro, an optical fiber gyro, and the like used for dead reckoning navigation.
The GPS unit 34 receives orbit data transmitted from three or four satellites used for satellite navigation, and outputs latitude and longitude data of the current location of the vehicle, an ASIC (Application Specific Integrated Circuit), etc. Consists of.

The vehicle speed sensor 36 that detects the traveling speed of the host vehicle is also used as position detection means by dead reckoning navigation. The mileage can be obtained by integrating the vehicle speed with time. The travel distance may be obtained using a Doppler ground speed sensor using radio waves or ultrasonic waves, or a ground speed sensor using light and a spatial filter.
The operation unit 38 includes a remote controller, an operation panel, and the like used for various inputs such as an update instruction of the map DB 70 or a destination. The destination may be inputted by voice with a microphone, and the inputted destination may be recognized by voice.

The display 40 is composed of an LCD (Liquid Crystal Display), a HUD (Head Up Display), etc. used for maps and various warning displays. The warning display may be displayed on a display different from the display used for the map display, for example, a display for displaying the vehicle speed, distance, engine speed, and the like.
The speaker 42 is used for a travel history route of the vehicle, a sound output for guiding a travel state, and a sound output for notifying various warnings. The speaker 42 may be shared with the audio speaker, or a dedicated navigation device may be provided.

  The navigation processing unit 50 is composed of a CPU, RAM, ROM and the like. The CPU of the navigation processing unit 50 controls each part in the navigation device 20 by executing a control program, and specifies a traveling road on which the host vehicle is traveling. In addition, the navigation processing unit 50 updates the map DB 70 with the difference file acquired from the center 60.

  The RAM of the navigation processing unit 50 temporarily stores data and programs processed by the CPU. The ROM of the navigation processing unit 50 is a rewritable nonvolatile memory storing a control program executed by the CPU, and uses an EEPROM or the like. The control program may be stored in the HDD 30. Data such as a control program, various program modules, and an update file of the map DB 70 are downloaded from a predetermined center by communication such as a mobile phone or a DCM (Data Communication Module). These data used in the navigation device 20 may be stored in the HDD 30 or ROM by reading from a computer-readable storage medium such as a removable memory (not shown).

The HDD 66 of the center 60 stores a map database (map DB 100, see FIG. 2) as server map data, difference management information 104 (see FIG. 2) of the map DB 100, and the like.
The center 60 transmits and receives data to and from the communication unit 24 of the navigation device 20 by the communication unit 62.
The data processing unit 64 includes a CPU, a RAM, a ROM, and the like. The CPU of the data processing unit 64 executes the data processing program to generate the latest version of the difference file and update the difference management information 104 when the map DB 100 is updated.

(Software configuration)
FIG. 2 is a block diagram showing a software configuration of the control program of the map update system 10.
(Block diagram of the navigation device 20)
The map DB 70 is a database composed of information obtained by digitally representing a map in a graph format, and is used for detecting the vehicle position and searching for and displaying a recommended route. In the map DB 70, intersections, turning points, dead ends, and the like are nodes, and roads are defined as links connecting nodes. In addition, distance, speed limit, number of lanes, width, corner radius, etc. are defined as attribute information for each link. The map DB 70 is configured by a section file 72 (see FIG. 7) corresponding to each section 200 of the map divided into meshes as shown in FIG. Each mesh is given a unique number. In addition, the navigation device 20 configures an application DB 84 (see FIG. 7) corresponding to various program modules 82 based on the data in the map DB 70.

  The travel history information 74 (see FIG. 6) stores, for example, a travel history route traveled in the past or a travel history route obtained as a result of searching for a travel route to the destination as a travel history. The travel history information 74 stores the coordinates of the departure points 210 and 214 and the arrival points 212 and 216 (see FIGS. 4 and 5) of the travel history route.

The road history information 76 (see FIG. 6) stores the road type, the approach mesh number, and the like for each link number of the traveling road in the traveling history route from the departure point 210 to the arrival point 212 and from the departure point 214 to the arrival point 216. ing.
The update management information 78 manages the mesh number, version, file name, and the like, which are file attributes of the section file 72 corresponding to each section 200 of the map DB 70, in a table format (see FIG. 7).

  The partial route setting module 90 is a program component that causes the navigation processing unit 50 to function as a partial route setting means. The partial route setting module 90 sets a partial route in each travel history route according to the road type of each travel history route based on the travel history information 74 and the road history information 76. In this embodiment, the road type is classified into a general road and a high standard road. The high standard road is a road composed of an expressway, an automobile exclusive road and a bypass, and the general road represents a road other than the high standard road composed of an expressway, an automobile exclusive road and a bypass. In addition to this classification, general roads may be further classified into national roads and prefectural roads and other roads excluding high-standard roads, national roads and prefectural roads. In FIG. 4, the travel history route is divided into a general road 220, a highway 222, and a general road 224, and each road is set as a partial route. In FIG. 5, since the vehicle travels only on the general road 226, the entire travel history route is set as one partial route.

The update range setting module 92 is a program component that causes the navigation processing unit 50 to function as update range setting means. The update range setting module 92 sets the update range of the map DB 70 for each partial route set by the partial route setting module 90 according to the road type of the partial route.
For example, in the travel history route of FIG. 4, the update range setting module 92 sets the distance from the departure point 210 to the entry point to the highway 222 as the radius r1, and sets the range of the radius r1 around the departure point 210 as the update range 230. To do. Next, the update range setting module 92 sets a range of the width d1 on both sides of the expressway 222 between the entry point and the exit point, and sets this range as the update range 232. Next, the distance from the point where the motorway 222 is exited to the arrival point 212 is set as a radius r2, and the range of the radius r2 around the arrival point 212 is set as an update range 234.

Further, in the travel history route shown in FIG. 5, since only the general road 226 is traveling from the departure point 214 to the arrival point 216, the update range setting module 92 starts from the departure point 214 and the arrival point 216, respectively. The ranges in which the straight line distance between the point 214 and the arrival point 216 is a radius are update ranges 236 and 238.
Then, the update range setting module 92 extracts the history number, mesh number, and version information of the section file 72 included in the update range from the travel history information 74 and the update management information 78 for each update range set in this way. And stored in the target mesh information 80 (see FIG. 6).

  The file attribute setting module 94 is a program component that causes the navigation processing unit 50 to function as file attribute setting means. The file attribute setting module 94 is a file determination attribute for determining whether or not the partition file 72 included in the update range set by the update range setting module 92 needs to be updated. It is set based on the history information 74 and the road history information 76 and stored in the target mesh information 80. For example, as shown in FIG. 9, when the road type of the partial route in the update range is a high standard road, the high standard road is set as the update target. In addition, when the road type of the partial route in the update range is a general road, the roads of all road types are subject to update. Therefore, in the update ranges 230, 234, 236, and 238 shown in FIGS. 4 and 5, all road types are targeted for update. In addition, in the update range 232, the high standard road is the update target.

  The update module 96 is a program component that causes the navigation processing unit 50 to function as an update unit. The update module 96 uses the server file 102 (see FIG. 4) generated as a difference file transmitted from the center 60 as an update file, and updates the partition file 72 of the map DB 70 of the partition 200 corresponding to the update file by this update file. Then, the version of the updated partition file 72 in the update management information 78 is changed.

  The communication module 98 is a program component that causes the navigation processing unit 50 to function as communication means. The communication module 98 transmits data such as the target mesh information 80 included in the update range to the center 60 and receives various data including map data from the center 60 in response to a transmission request from the control program of the navigation device 20. .

(Block diagram of center 60)
Similar to the map DB 70, the map DB 100 is a database including information obtained by digitally representing a map in a graph format. As shown in FIG. 7, the map DB 100 is managed as a collection of server files 102 for each version. The server file 102 of the map DB 100 corresponds to the partition file 72 of the map DB 70, and is assigned the same mesh number as the partition file 72 corresponding to each server file 102. The server file 102 that constitutes the map data of each version of version 1.0 or later as a reference is generated as a difference file that is a change from the previous version when the map DB 100 is updated.

  As shown in FIG. 7, the difference management information 104 includes a mesh format, a version, a road update level, mesh coordinates corresponding to the server file 102, a file name, and the like that are file attributes of each server file 102 of the map DB 100 in a table format. It is managed by. For example, as shown in FIG. 8, the road update level is classified into A, B, and C, and indicates the updated road type in each version of the server file 102 corresponding to the section file 72. The road type updated for each road update level is different. Road update level A indicates that at least a high standard road has been updated, road update level B indicates that at least national roads and prefectural roads have been updated except for high standard roads, and road update level C indicates a high standard road. , Roads other than national roads and prefectural roads have been updated.

  The determination module 106 is a program component that causes the data processing unit 64 to function as determination means. The determination module 106 determines from the target mesh information 80 received from the navigation device 20 and the difference management information 104 of the center 60 whether the partition file 72 of the map DB 70 of the navigation device 20 is a file to be updated.

A specific example in which the determination module 106 determines whether or not the partition file 72 needs to be updated will be described.
The version of the partition file 72 with mesh number 1 is 1.0 as shown in the target mesh information 80 of FIG. In addition, the road types to be updated in the section file 72 with mesh number 1 are all roads. Referring to the difference management information 104, the server file 102 corresponding to mesh number 1 contains version 1.0, 2.0, X. 0 (X.0 is a version later than 2.0) exists.

  First, the determination module 106 compares the versions of the target mesh information 80 in FIG. 6 and the difference management information 104 in FIG. 7, and the version 2. 0, road update level A server file 102, version X. It is determined that the server file 102 of 0, road update level C exists.

  Next, the road update level of the server file 102 that is newer than the section file 72 of mesh number 1 is compared with the road type of mesh number 1 in the target mesh information 80. Version 2.0 of mesh number 1, X. The road update levels of the server file 102 of 0 are A and C. The road update level A indicates that the high standard road is updated in the server file 102, and the road update level C indicates that the road excluding the high standard road, the national road, and the prefectural road is updated. Since the road type to be updated in the section file 72 of mesh number 1 is all roads, mesh number 1, version 2.0, X. In both server files 102 of 0, the road to which the section file 72 of mesh number 1 should be updated has been updated or may have been updated. Therefore, the determination module 106 determines that the partition file 72 with mesh number 1 is a file to be updated.

  Next, the update process of the partition file 72 with mesh number 2 will be described. As shown in the target mesh information in FIG. 6, the road type to be updated with mesh number 2 is a high-standard road. The version of the partition file 72 with mesh number 2 is 2.0. Referring to the difference management information 104 in FIG. 7, the version X. The road update level of the server file 102 of 0 is B. The road update level B indicates that at least the national road and the prefectural road are updated in the server file 102 except for the high standard road. That is, the high standard road to be updated in the section file 72 of mesh number 2 is mesh number 2, version X. 0 server file 102 has not been updated. Therefore, the determination module 106 determines that the partition file 72 with mesh number 2 is not a file to be updated.

Hereinafter, the determination module 106 determines whether or not it is necessary to update the partition file 72 of the mesh number indicated in the target mesh information 80 for each travel history route based on the target mesh information 80 and the difference management information 104.
The selection module 108 is a program component that causes the data processing unit 64 to function as selection determination means. The selection module 108 selects from the map DB 100 the server file 102 corresponding to the road type that is the file determination attribute of the section file 72 that is determined to be updated by the determination module 106. In the above-described example, with respect to the partition file 72 with mesh number 1, mesh number 1, version 2.0, X. Both server files 102 of 0 are selected as update files.

The acquisition module 110 is a program component that causes the data processing unit 64 to function as acquisition means. The acquisition module 110 acquires from the map DB 100 the server file 102 corresponding to the section file 72 that the determination module 106 has determined to be updated.
The communication module 112 is a program component that causes the data processing unit 64 to function as communication means. The communication module 112 transmits the server file 102 acquired by the acquisition module 110 to the navigation device 20 as an update file. Further, the communication module 112 receives data such as the target mesh information 80 from the navigation device 20.

Next, the operation of the map update system 10 will be described using the travel history route of FIGS. 4 and 5 as an example.
10 and 11 are flowcharts showing the flow of the map update program of the map update system 10. In the present embodiment, the process shown in FIG. 10 is executed in the navigation device 20, and the process shown in FIG. 11 is executed in the center 60.

(Navigation device 20 side processing)
In step 300, the navigation apparatus 20 determines whether there is a travel history of a high-standard road on the travel history route. If there is a travel history of the expressway 222 as shown in FIG. 4, the navigation device 20 determines that the distance from the departure point 210 to the entry point to the expressway 222 on the travel history route is the radius r1 in step 302. The road information of the current version in the circle is acquired in mesh units and stored in the target mesh information 80.

Next, in step 304, the navigation device 20 obtains the current version of road information within a predetermined width d1 on both sides of the highway 222 centering on the highway 222 in mesh units in the travel portion of the highway 222 on the travel history route. And is stored in the target mesh information 80.
Next, in step 306, the navigation device 20 acquires the current version of road information in a circle with a radius r2 as the distance from the expressway 222 centered on the arrival point 212 on the travel history route to the point of departure on a mesh basis. And stored in the target mesh information 80. And the navigation apparatus 20 transfers a process to step 308. FIG.

  Further, as shown in FIG. 5, when there is no travel history of the high-standard road in the travel history route, the navigation device 20 sets the distance from the departure point 214 to the arrival point 216 on the travel history route as a radius in step 310. The road information of the current version in the circle is acquired for each mesh and stored in the target mesh information 80. Further, in step 312, the navigation device 20 acquires, in mesh units, current version road information in a circle whose radius is the distance from the arrival point 216 to the departure point 214 on the travel history route. 80. And the navigation apparatus 20 transfers a process to step 308. FIG.

In step 308, the navigation device 20 determines whether all the travel history routes have been inspected, and if not, returns the processing to step 300. When all the travel history routes have been inspected, the navigation device 20 transmits the target mesh information to the center 60 in step 314. Then, it waits until an update file is transmitted from the center 60.
When the update file is received from the center 60, in step 316, the navigation device 20 updates the map DB 70 with the update file.

(Center 60 side processing)
In step 320, the center 60 compares the target mesh information 80 received from the navigation device 20 with the difference management information 104 of the center 60, and the version of the map DB 100 of the center 60 is the map of the navigation device 20 in the mesh of the same number. It is judged whether it is newer than DB70.

  If the version of the map DB 100 of the center 60 is newer than the version of the map DB 70 of the navigation device 20, the center 60 determines whether the server file 102 of the map DB 100 corresponds to a mesh update target road in the target mesh information 80 in step 322. Determine. Specifically, as described above, the center 60 determines whether the road of the road type to be updated with this mesh is updated with respect to the mesh server file 102 in the update range. If it has been updated, the center 60 acquires the corresponding server file 102 from the map DB 100 as an update file to be transmitted to the navigation device 20, and proceeds to step 326.

If the version of the map DB 100 of the center 60 is the same as or older than the version of the map DB 70 of the navigation apparatus 20, the center 60 determines in step 326 whether all meshes have been processed. If there is an unprocessed mesh, the process returns to step 310.
When all the meshes have been processed, in step 328, the center 60 transmits the server file 102 acquired from the map DB 100 to the navigation device 20 as an update file.

  In the first embodiment, in a travel history route that has been traveled in the past or obtained as a result of searching for a travel route to a destination, a partial route is set according to the road type, and an update that is set according to the partial route In the range, the road type to be updated is set according to the road type of the travel history route. Therefore, the data amount for updating the map DB 70 is reduced as compared with the case where the map DB 70 is updated with the difference file of the map DB 100 that is newer than the map DB 70 for all road types. As a result, the communication time for transmitting update data from the center 60 to the navigation device 20 is reduced, so the communication fee is reduced. Moreover, since the data amount which updates map DB70 reduces, the load of the navigation apparatus 20 which updates map DB70 falls.

  Further, since the server file 102 corresponding to the section file 72 is managed for each road update level corresponding to the updated road type, for example, all road types such as update ranges 230, 234, 236, and 238 are used. Even in the update range to be updated, not all of the road update level server files 102 are selected, but only the server file 102 that is newer than the section file 72 can be selected as the update file. As a result, since the amount of data for updating the map DB 70 is further reduced, the load on the navigation device 20 for updating the map DB 70 is reduced.

(Second Embodiment)
The software configuration of the map update system according to the second embodiment of the present invention is shown in FIG. The hardware configuration of the map update system of the second embodiment is substantially the same as that of the first embodiment. In addition, the same code | symbol is attached | subjected to the substantially same component as 1st Embodiment.
In the second embodiment, the center 60 receives the travel history information 74, the road history information 76, and the update management information 78 from the navigation device 20, so that the partial route setting module 90, the update range setting module 92, and the file attribute setting module are received. 94 is executed. Thus, the update load of the navigation apparatus 20 which updates map DB70 can be reduced by increasing the process performed in the center 60. FIG.

  Compared to the first embodiment and the second embodiment, when the navigation device 20 receives the difference management information 104 from the center 60, in the navigation device 20, the partial route setting module 90, the update range setting module 92, the file attribute setting. The module 94, the determination module 106, and the selection module 108 may be executed. The center 60 acquires the update file selected by the navigation device 20 from the map DB 100 and transmits it to the navigation device 20.

(Third embodiment)
FIG. 13 shows the software configuration of the map update system according to the third embodiment of the present invention. The hardware configuration of the map update system of the third embodiment is substantially the same as that of the first embodiment.
(Block diagram of the navigation device 20)
The reference point setting module 120 is a program component that causes the navigation processing unit 50 to function as reference point setting means. When updating the map DB 70, the reference point setting module 120 sets a reference point 240 of an area to be updated as shown in FIG. The reference point setting module 120 sets the user's residence, the current position of the vehicle, the place name input by the user from the operation unit 38, or the place name acquired from the place name list displayed on the display 40 as the reference point. To do.

  The classification module 122 is a program component that causes the navigation processing unit 50 to function as classification means. The classification module 122 classifies the travel history route into a travel history route group according to the number of travels specified based on the travel history information 74. Here, the number of traveling times represents not only the number of actual traveling times but also the number of times the traveling route to the destination has been searched. In 3rd Embodiment, it classify | categorizes into the driving | running history route group which drive | worked 1 time or more, and the driving | running history route group which ran 2 times or more.

  The update range setting module 124 is a program component that causes the navigation processing unit 50 to function as update range setting means. As shown in FIG. 14, the update range setting module 124 sets the farthest point farthest from the reference point 240 as the radius from the reference point 240 in the travel history route of each travel history route group classified by the classification module 122. 242 and 244 are set. The update range 242 is an update range of a travel history route group that has traveled one or more times, and an update range 244 is an update range of a travel history route group that has traveled twice or more.

  The file attribute setting module 126 is a program component that causes the navigation processing unit 50 to function as file attribute setting means. The file attribute setting module 126 is a file determination attribute for determining whether or not the partition file 72 included in the update range set by the update range setting module 124 needs to be updated. It is set based on the history information 74 and the road history information 76 and is stored in the target mesh information 80 as in the first embodiment. In the update ranges 242 and 244 shown in FIG. 14, the update range 242 is an update target for high-standard roads. In addition, the update range 244 includes all road types of roads as update targets.

(Center 60 software configuration)
The center 60 determines whether the partition file 72 of the map DB 70 needs to be updated by the determination module 106, the selection module 108, and the acquisition module 110 from the target mesh information 80 received from the navigation device 20 and the difference management information 104 of the center 60. The update file for updating the partition file 72 determined to be updated is selected from the DB 100 and acquired.

Next, the flow of the map update program of the map update system 10 of 3rd Embodiment is demonstrated based on the flowchart of FIG.
(Navigation device 20 side processing)
In step 350, the navigation apparatus 20 classifies the travel history route into a travel history route group according to the designated number of travels. Furthermore, the navigation device 20 updates a circle centered on the reference point 240 in the update range 242 with the radius from the farthest point farthest from the reference point 240 and the distance from the reference point 240 in the travel history route in each of the travel history route groups. 244.

  In step 352, the navigation device 20 sets the road type to be updated, which is a file determination attribute for determining whether or not the section file needs to be updated, in the set update ranges 242 and 244. Then, the navigation apparatus 20 transmits the mesh number, version, and road type to be updated to the center 60 as the target mesh information 80 shown in FIG. And the navigation apparatus 20 waits until the update file which updates map DB70 is transmitted from the center 60. FIG.

When the update file is transmitted from the center 60, the navigation device 20 updates the map DB 70 with the transmitted update file in step 354.
(Center 60 side processing)
Steps 360 to 368 executed on the center 60 side are substantially the same as steps 320 to 328 shown in FIG. 11 of the first embodiment.

  In the third embodiment, the travel history routes that have been traveled in the past or obtained as a result of searching for the travel route to the destination are classified into travel history route groups according to the number of travels, and a reference point is set for each travel history route group. The update ranges 242 and 244 having different ranges from 240 are set, and the road type to be updated is set according to the number of times of travel in the update ranges 242 and 244. Therefore, the data amount for updating the map DB 70 is reduced as compared with the case where the map DB 70 is updated with the difference file of the map DB 100 that is newer than the map DB 70 for all road types. As a result, the communication time for transmitting update data from the center 60 to the navigation device 20 is reduced, so the communication fee is reduced. Moreover, since the data amount which updates map DB70 reduces, the load of the navigation apparatus 20 which updates map DB70 falls.

For the setting of the update ranges 242 and 244 of the third embodiment, for example, an update range having a radius that is the average of the farthest points from the reference point 240 of each travel history route in the travel history route group may be set. In this way, the distance between each travel history route group classified according to the number of travels and the reference point may be set based on any criterion.
In the third embodiment, the update ranges 242 and 244 are divided as circles with the reference point 240 as the center, but administrative ranges such as prefectures, cities, towns, villages, and the like may be used as boundaries between the update separation ranges.

(Fourth embodiment)
The software configuration of the map update system according to the fourth embodiment of the present invention is shown in FIG. The hardware configuration of the map update system of the fourth embodiment is substantially the same as that of the third embodiment. In addition, the same code | symbol is attached | subjected to the substantially same component as 3rd Embodiment.
In the fourth embodiment, the center 60 receives the travel history information 74, the road history information 76, and the update management information 78 from the navigation device 20, thereby causing the classification module 122, the update range setting module 124, and the file attribute setting module 126 to be displayed. Running. Thus, the update load of the navigation apparatus 20 which updates map DB70 can be reduced by increasing the process performed in the center 60. FIG.

  Compared to the third embodiment and the fourth embodiment, when the navigation device 20 receives the difference management information 104 from the center 60, the navigation device 20 includes a classification module 122, an update range setting module 124, and a file attribute setting module 126. The determination module 106 and the selection module 108 may be executed. The center 60 acquires the update file selected by the navigation device 20 from the map DB 100 and transmits it to the navigation device 20.

(Other embodiments)
In the above-described embodiment, the road type is adopted as the file determination attribute. However, as the file determination attribute, in addition to the road type, for example, the distinction between the main office of a public facility, the branch office, the head office such as a bank, and the branch is distinguished. It may be adopted.
In addition, when the map DB has a hierarchical structure, and the detailed level of data differs depending on the hierarchy, a hierarchy having a different level of data depending on the update range may be used as the file determination attribute.

Moreover, although the navigation apparatus mounted in a vehicle was demonstrated in the said embodiment, the use of this invention is not restricted to this, For example, you may apply to the navigation apparatus which a user carries in order to refer to a map. .
In addition, the sharing of each module by the navigation device 20 and the center 60 is not limited to the form shown in the above-described embodiments, and is shared by the navigation device 20 and the center 60 in a combination of possible processing ranges. Also good.

The hardware block diagram by 1st Embodiment. The block diagram of the software by a 1st embodiment. Explanatory drawing which shows the division | segmentation form of map DB. An explanatory view showing a run history course. An explanatory view showing a run history course. Explanatory drawing which produces | generates object mesh information. The correspondence figure of map DB and management information. The correspondence figure of a road update level and the updated road classification. FIG. 5 is a correspondence diagram between a travel history road type and an update target road type. The flowchart which shows the map update in a navigation apparatus. The flowchart which shows the map update in a center. The software block diagram by 2nd Embodiment. The software block diagram by 3rd Embodiment. Explanatory drawing which shows the distance from a reference point. The flowchart which shows the map update of 3rd Embodiment. The block diagram of the software by a 4th embodiment.

Explanation of symbols

10: Map update system, 20 navigation device, 50: Navigation processing unit (partial route setting means, update range setting means, file attribute setting means, reference point setting means, classification means, update means), 60: Center (map server) 64: Data processing unit (partial route setting means, update range setting means, file attribute setting means, determination means, selection means, acquisition means), 70: map DB (navigation map data), 72: section file, 74: travel History information, 76: road history information, 78: update management information, 80: target mesh information, 100: map DB (server map data), 102: server file, (difference file, update file), 104: difference management information, 220, 224, 226: General road (partial route, travel history route), 222: Expressway Partial path, driving history route), 230,234,236,238,242,244: update range, 240: reference point

Claims (16)

In a navigation device that updates navigation map data by an update file acquired from the server map data by a map server that manages server map data,
Communication means for receiving from the map server the update file for updating a section file corresponding to each section of the navigation map data divided into a plurality of sections;
Updating means for updating the navigation map data with the update file;
With
The update file corresponds to the road type updated in the section corresponding to each section file in the update range set for each partial path of the travel history path set according to the road type on the travel history path. Satisfying a file determination attribute that is selected from a server file of the server map data managed for each road update level and that defines an update target road type to be updated in the section file according to the road type of the partial route. A featured navigation device. A partial route setting means for setting the partial route according to the road type;
Update range setting means for setting the update range;
File attribute setting means for setting the file determination attribute;
The navigation device according to claim 1, further comprising:   The map server sets the partial route, sets the update range, sets the file determination attribute, and sets a file attribute corresponding to the road update level of the server file corresponding to the section file of the update range. And the file determination attribute to determine whether or not the partition file in the update range needs to be updated, and updates the partition file determined to be updated according to the determination result, the update satisfying the file determination attribute The navigation device according to claim 1, wherein a file is selected from the server file. In a navigation device that updates navigation map data by an update file acquired from the server map data by a map server that manages server map data,
A reference point setting means for setting a reference point for updating the navigation map data having a partition file corresponding to each partition divided into a plurality of partitions;
Communication means for receiving the update file for updating the partition file from the map server;
Updating means for updating the navigation map data with the update file;
With
In the update range in which the update file is set in a different range around the reference point according to the distance between each reference history point and each travel history route group obtained by classifying the travel history route according to the number of times of travel, The update target road type to be updated in the partition file is selected from the server file of the server map data managed for each road update level corresponding to each partition file and corresponding to the road type updated in the partition. A navigation apparatus satisfying a file determination attribute defined according to the number of travels corresponding to the above. Classification means for classifying the travel history route into the travel history route group;
Update range setting means for setting the update range;
File attribute setting means for setting the file determination attribute;
The navigation device according to claim 4, further comprising:   The map server classifies the travel history route into the travel history route group, sets the update range, sets the file determination attribute, and the road of the server file corresponding to the section file of the update range. The file attribute corresponding to the update level is compared with the file determination attribute to determine whether or not the partition file in the update range needs to be updated, and the partition file determined to be updated according to the determination result is updated. 5. The navigation device according to claim 4, wherein the update file that satisfies a file determination attribute is selected from the server file.   The navigation device according to any one of claims 4 to 6, wherein the number of types of the update target road types defined by the file determination attribute increases in the update range in which the number of travels is large.   The navigation device according to any one of claims 1 to 7, wherein the server file of the server map data of a version after the reference version is a difference file from the immediately previous version. In the map server where the navigation device acquires an update file for updating the navigation map data from the server map data,
Obtaining means for obtaining from the server map data the update file for updating the navigation map data having a section file corresponding to each section divided into a plurality of sections;
Communication means for transmitting the update file to the navigation device;
With
The update file corresponds to the road type updated in the section corresponding to each section file in the update range set for each partial path of the travel history path set according to the road type on the travel history path. Satisfying a file determination attribute that is selected from a server file of the server map data managed for each road update level and that defines an update target road type to be updated in the section file according to the road type of the partial route. A featured map server. In the map server where the navigation device acquires an update file for updating the navigation map data from the server map data,
Obtaining means for obtaining from the server map data the update file for updating the navigation map data having a section file corresponding to each section divided into a plurality of sections;
Communication means for transmitting the update file to the navigation device;
With
In the update range in which the update file is set in a different range around the reference point according to the distance between each reference history point and each travel history route group obtained by classifying the travel history route according to the number of times of travel, The update target road type to be updated in the partition file is selected from the server file of the server map data managed for each road update level corresponding to each partition file and corresponding to the road type updated in the partition. A map server satisfying a file determination attribute defined in accordance with the number of travels corresponding to the above. In a map update system that updates navigation map data with an update file obtained from server map data,
A partial route setting means for setting a partial route of the travel history route according to a road type on the travel history route;
Update range setting means for setting an update range for each partial path;
File attribute setting means for setting a file determination attribute that defines an update target road type to be updated in the section file of the update range according to the road type of the partial route corresponding to the update range;
A file attribute corresponding to the road update level of the server file of the server map data managed for each road update level corresponding to the road type updated in the section corresponding to the section file in the update range and the file A determination unit that compares the determination attribute and determines whether or not the partition file in the update range needs to be updated;
A selection unit that updates the partition file that the determination unit determines to be updated, and that selects an update file that satisfies the file determination attribute from the server file;
Acquisition means for acquiring the update file selected by the selection means from the server map data;
Transmitting means for transmitting the update file acquired by the acquiring means;
Receiving means for receiving the update file transmitted from the transmitting means;
Updating means for updating the navigation map data with the update file received by the receiving means;
A map update system comprising: In a map update system that updates navigation map data with an update file obtained from server map data,
A reference point setting means for setting a reference point for updating navigation map data having a partition file divided into a plurality of sections and corresponding to each section;
Classification means for classifying the travel history route into a travel history route group according to the number of travels;
Update range setting means for setting an update range in a different range around the reference point according to the distance between the reference point and each travel history route group;
File attribute setting means for setting a file determination attribute that defines an update target road type to be updated in the section file of the update range according to the number of travels corresponding to the update range;
A file attribute corresponding to the road update level of the server file of the server map data managed for each road update level corresponding to the road type updated in the section corresponding to the section file in the update range and the file A determination unit that compares the determination attribute and determines whether or not the partition file in the update range needs to be updated;
A selection unit that updates the partition file that the determination unit determines to be updated, and that selects an update file that satisfies the file determination attribute from the server file;
Acquisition means for acquiring the update file selected by the selection means from the server map data;
Transmitting means for transmitting the update file acquired by the acquiring means;
Receiving means for receiving the update file transmitted from the transmitting means;
Updating means for updating the navigation map data with the update file received by the receiving means;
A map update system comprising: In a map update method in which a map server that manages server map data updates navigation map data with an update file acquired from the server map data,
A communication step of receiving from the map server the update file for updating a partition file corresponding to each partition of the navigation map data divided into a plurality of partitions;
An update stage for updating the navigation map data with the update file;
Including
The update file corresponds to the road type updated in the section corresponding to each section file in the update range set for each partial path of the travel history path set according to the road type on the travel history path. Satisfying a file determination attribute that is selected from a server file of the server map data managed for each road update level and that defines an update target road type to be updated in the section file according to the road type of the partial route. A feature of the map update method. In a map update method in which a map server that manages server map data updates navigation map data with an update file acquired from the server map data,
A reference point setting step for setting a reference point for updating the navigation map data having a partition file divided into a plurality of partitions and corresponding to each partition;
Receiving the update file for updating the partition file from the map server; and
An update stage for updating the navigation map data with the update file;
Including
In the update range in which the update file is set in a different range around the reference point according to the distance between each reference history point and each travel history route group obtained by classifying the travel history route according to the number of times of travel, The update target road type to be updated in the partition file is selected from the server file of the server map data managed for each road update level corresponding to each partition file and corresponding to the road type updated in the partition. The map update method characterized by satisfy | filling the file determination attribute prescribed | regulated according to the said frequency | count of driving | running | working applicable to. In a map update program in which a map server that manages server map data updates navigation map data with an update file acquired from the server map data,
Communication stage means for receiving from the map server the update file for updating a section file corresponding to each section of the navigation map data divided into a plurality of sections;
Causing the computer to function as an update means for updating the navigation map data with the update file;
The update file corresponds to the road type updated in the section corresponding to each section file in the update range set for each partial path of the travel history path set according to the road type on the travel history path. Satisfying a file determination attribute that is selected from a server file of the server map data managed for each road update level and that defines an update target road type to be updated in the section file according to the road type of the partial route. Feature map update program. In a map update program in which a map server that manages server map data updates navigation map data with an update file acquired from the server map data,
A reference point setting means for setting a reference point for updating the navigation map data having a partition file corresponding to each partition divided into a plurality of partitions;
Communication means for receiving the update file for updating the partition file from the map server;
Causing the computer to function as an update means for updating the navigation map data with the update file;
In the update range in which the update file is set in a different range around the reference point according to the distance between each reference history point and each travel history route group obtained by classifying the travel history route according to the number of times of travel, The update target road type to be updated in the partition file is selected from the server file of the server map data managed for each road update level corresponding to each partition file and corresponding to the road type updated in the partition. A map update program characterized by satisfying a file determination attribute defined according to the number of travels corresponding to the above.

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