JP4240295B2 - MAP DISPLAY DEVICE, MAP DISPLAY METHOD, AND NAVIGATION DEVICE - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a map display device and a map display method.Navigation deviceFor example, it is suitable for application to a navigation system.
[0002]
[Prior art]
Conventionally, a navigation system is composed of a navigation device and a map providing server, and the map data provided from the map providing server is displayed as a map on the display unit of the navigation device so as to present the current position to the user. Has been made.
[0003]
The navigation device is mounted on a car or the like and moves, and measures the current position based on position information such as GPS (Global Positioning System). For example, the current position based on map data stored in a built-in hard disk or the like. A map corresponding to the position is displayed, or a route search from an arbitrary start point to an end point is performed, and the search result is displayed as a guide route on the map.
[0004]
Here, the navigation device needs to constantly update the map data stored in the built-in hard disk to the latest map data because actual roads, buildings, and the like change day by day.
[0005]
Therefore, the navigation device downloads the latest map data updated by the map providing server at intervals of, for example, once a year via the Internet, etc., and updates the map data stored in the built-in hard disk to the latest map data. It is made like that.
[0006]
At this time, since the data size in the latest map information is very large, the navigation device takes a lot of time to download the latest map data from the map providing server.
[0007]
Therefore, the navigation apparatus is configured to partially update only the update range in the latest map data by arbitrarily selecting only the region that is considered to be frequently used by the user and setting the update range.
[0008]
In addition to updating map data in units of regions as described above, a method of partially updating map data has been proposed (see, for example, Patent Document 1).
[0009]
[Patent Document 1]
JP 2002-296042 A (6th page, FIG. 1)
[0010]
[Problems to be solved by the invention]
By the way, in the navigation device having such a configuration, as a result of partial update of the map data of the navigation device in units of areas, the map data before and after the partial update are mixed, and the guidance route by the route search is displayed on the map before the update. However, there is a problem in that the guide route and the map do not match and the user cannot be guided accurately.
[0011]
  The present invention has been made in consideration of the above points, and a map display device and a map display method capable of correctly displaying a guide route on a map even when partial updating is performed.Navigation deviceIs to try to propose.
[0012]
[Means for Solving the Problems]
  In order to solve this problem, the map display device of the present inventionAnd navigation deviceA mixed map data storage means for storing mixed map data in which at least two types of map data of the latest map data and local map data of different generations are partially mixed;About all regionsRoute map data storage means for storing the latest route map data corresponding to the latest map data and the current route map data corresponding to the local map data, and searching for a guide route from an arbitrary start point position to an end point position based on the latest route map data When the route search means and the guide route searched by the route search means are superimposed on the map based on the mixed map data and displayed on the display means, the latest guide route based on the latest route map data is displayed in the portion corresponding to the latest map data. In the part corresponding to the local map dataFrom the latest guide route based on the latest route map dataCurrent guide route based on current route map dataConvert toBy providing a display control means for displaying, the latest guide route based on the latest route map data is displayed on the map corresponding to the latest map data, and based on the current route map data on the map corresponding to the local map data. Since the current guide route can be displayed, the correct guide route according to the display map can be presented to the user.
  In the map display method of the present invention,About all regionsA route search step that searches for a guide route from an arbitrary start point position to an end point position based on the latest route map data corresponding to the latest map data, and a local map with a different generation from the latest map data The latest guide route based on the latest route map data in the portion corresponding to the latest map data when being displayed on the display means superimposed on the map based on the mixed map data in which at least two types of map data are partially mixed with the data In the part corresponding to the local map data, Corresponding to the local map data from the latest guide route based on the latest route map dataCurrent guide route based on current route map dataConvert toBy providing a display control step for displaying, the latest guide route based on the latest route map data is displayed on the map corresponding to the latest map data, and the current route map data is displayed on the map corresponding to the current display map data. Based on the current guide route, the correct guide route according to the display map can be presented to the user..
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0014]
(1) Configuration of map update system
As shown in FIG. 1, a navigation device 2 as a map display device in the map update system 1 is configured such that a control unit 3 having a CPU (Central Processing Unit) configuration performs overall control, and includes a GPS antenna 4 </ b> A and A satellite signal from a GPS satellite (not shown) received via a position information processing unit 4 such as a GPS receiver is acquired as current position information and stored in the map data storage area 5B of the storage unit 5 A location corresponding to the current position information is read from map data (hereinafter referred to as local map data), and the local map data and a map image made up of predetermined landmarks are displayed on the display unit 6. Has been made.
[0015]
Further, the navigation device 2 executes the route search program stored in the program storage area 5A of the storage unit 5 to search for the route from the start point to the end point specified by the operation of the operation unit 7 and obtain the guide route data. The route guidance according to the guidance route data is performed on the map generated and displayed on the display unit 6.
[0016]
Further, the navigation device 2 registers arbitrary points selected by the user in the various data storage areas 5C of the storage unit 5 and can read them as necessary.
[0017]
In addition, the navigation device 2 is connected to the computer 11 via the communication processing unit 8 and is connected to the map providing server 13 as a map providing device via the computer 11 and the Internet 12.
[0018]
Here, in order to connect the navigation apparatus 2 and the computer 11, USB (Universal Serial Bus), wireless LAN (Local Area Network), Bluetooth (registered trademark), or the like may be used.
[0019]
The map providing server 13 is configured such that the control unit 13A performs overall control, stores the latest map data as a providing map and a map providing program in the storage unit 13B, and the control unit 13A provides the map. By executing the program, update area map data to be updated is provided to the navigation device 2 and the like via the Internet 12.
[0020]
The computer 11 is configured so that the control unit 11A performs overall control, stores a map data update relay program in the storage unit 11B, and when connected to the navigation device 2 and the Internet 12, the map data update relay is performed. By executing the program, when the navigation device 2 updates the map data, the communication process between the navigation device 2 and the map providing server 13 is relayed.
[0021]
As shown in FIGS. 2A and 2B, the navigation device 2 generates generation information representing the respective generations for the current display map DA, the current route map data RA, the current display map DA, and the current route map data RA. The local map data (not shown) is stored in the map data storage area 5B, and the display unit 6 displays the current display map DA.
[0022]
Here, the current display map DA is divided into a plurality of areas each having a predetermined size (for example, a square having a side of 20 [km]), and corresponds to an actual road on the divided area map. The displayed display path ER is shown.
[0023]
In the current route map data RA, a link L corresponding to the display route ER is represented, and the links L are connected by a node N.
[0024]
On the other hand, as shown in FIGS. 3A and 3B, the map providing server 13 generates generation information (representing each generation for the latest display map DB, the latest route map data RB, the latest display map DB, and the latest route map data RB) ( The latest map data consisting of (not shown) is stored in the storage unit 13B.
[0025]
(2) Map update processing
By the way, the navigation device 2 is adapted to perform partial update of the local map data stored in the map data storage area 5B by acquiring the latest map data stored in the storage unit 13B of the map providing server 13. The map data partial update processing procedure of the map update system 1 at that time will be described with reference to the flowchart of FIG.
[0026]
In step SP11, the control unit 11A of the computer 11 updates the range to be updated on the current display map DA with respect to the navigation device 2 connected to the computer 11, and generation information for each region map in the update range. And proceeds to the next step SP12.
[0027]
At this time, in step SP1, the control unit 3 of the navigation device 2 receives a request for an update range and generation information from the computer 11, and proceeds to the next step SP2.
[0028]
In step SP2, the control unit 3 of the navigation device 2 determines whether or not a point PH representing the user's home position is registered, as shown in FIG. If a negative result is obtained here, this indicates that the point PH has not been registered yet, and at this time, the control unit 3 moves to step SP3.
[0029]
In step SP3, the control unit 3 of the navigation device 2 prompts the user to register the point PH by displaying a message on the display unit 6, and returns to step SP2 again.
[0030]
On the other hand, if a positive result is obtained in step SP2, this indicates that the point PH has already been registered. At this time, the control unit 3 of the navigation device 2 moves to the next step SP4.
[0031]
In step SP4, the control unit 3 of the navigation device 2 estimates that a predetermined distance range of, for example, a radius of 50 [km] around the point PH is likely to be used by the user, and this is assumed to be a virtual circle SC (see FIG. 5 is indicated by a wavy line).
[0032]
Further, the control unit 3 of the navigation device 2 sets all the area maps including the virtual circle SC as the estimated use range SE (indicated by hatching in FIG. 5), and proceeds to the next step SP5.
[0033]
As described above, the control unit 3 of the navigation device 2 sets the estimated use range SE of the current display map DA stored in the map data storage area 5B based on the virtual circle SC centered on the registered point PH. Has been made.
[0034]
Next, in step SP5, the control unit 3 of the navigation device 2 transmits the estimated usage range SE that is the update range and the generation information in each area map in the estimated usage range SE to the computer 11, and proceeds to the next step SP6. .
[0035]
At this time, in step SP12, the control unit 11A of the computer 11 receives the estimated usage range SE and the generation information from the navigation device 2, and transmits them to the map providing server 13 via the Internet 12 in the form of relaying them as they are. Control goes to step SP13.
[0036]
Then, in step SP21, the control unit 13A of the map providing server 13 receives the estimated usage range SE and generation information from the computer 11, and proceeds to the next step SP22.
[0037]
In step SP22, the control unit 13A of the map providing server 13 based on the estimated usage range SE and the generation information displays the latest display stored in the generation and storage unit 13B in each area map in the estimated usage range SE of the current display map DA. The generation of each area map in the estimated usage range SE in the map DB is compared, and only the newest area map of the generation in the latest display map DB is set as an update target.
[0038]
Next, the control unit 13A of the map providing server 13 updates the plurality of newest area maps set as update targets based on the estimated usage range SE and the latest route map data RB corresponding to the entire latest display map DB to the update area map. After the data is transmitted to the computer 11 via the Internet 12, the process proceeds to step SP23 and the processing in the map providing server 13 is terminated.
[0039]
The control unit 13A of the map providing server 13 sends the update area map data to the computer 11 if there is no update target because the entire area map of the estimated usage range SE received from the navigation device 2 is the latest generation. Instead, the end notification of the map data partial update process is performed.
[0040]
In step SP13, the control unit 11A of the computer 11 receives the update area map data from the map providing server 13, relays it as it is, and transmits the update area map data to the navigation device 2, then moves to step SP14 and moves to the computer 11 The process in is terminated.
[0041]
In step SP6, the control unit 3 of the navigation device 2 receives the update area map data from the computer 11 and proceeds to the next step SP7.
[0042]
In step SP7, the control unit 3 of the navigation device 2 uses the current display stored in the map data storage area 5B using a plurality of newest area maps corresponding to the estimated usage range SE in the latest display map DB in the updated area map data. The map DA is partially updated, and the latest route map data RB in the update region map data is added to the current route map data RA and stored in the map data storage region 5B. Then, the process proceeds to step SP8 and the map data partial update processing is performed. finish.
[0043]
If the control unit 3 of the navigation device 2 receives the notification of the end of the map data partial update process in step SP6, the control unit 3 proceeds to step SP8 without performing the partial update of map data in step SP7, and performs the map data partial update process. It is supposed to end.
[0044]
As described above, the map update system 1 sets the estimated usage range SE based on the virtual circle SC centered on the point PH registered by the user, and sends the estimated usage range SE and generation information from the navigation device 2 via the computer 11. Then, the latest generation updated area map data corresponding to the estimated use range SE is provided from the map providing server 13 to the navigation device 2 by transmitting to the map providing server 13 and stored in the map data storage area 5B. The map data can be partially updated with the update area map data.
[0045]
Incidentally, in the map update system 1, the navigation device 2 and the map providing server 13 are connected for communication via the computer 11, but the computer 11 is omitted and the navigation device 2 and the map providing server are connected. 13 may be directly connected to each other via a wireless LAN or the like.
[0046]
  By the way, in the current display map DA (FIG. 5)Thick broken lineIn the generation mixed range SQ composed of the area map DA1 to the area map DA4 surrounded by the area map DA1, the area map DA2 of the estimated usage range SE, the area map DA1, the area map DA3, and the area map DA4 outside the estimated usage range SE Next, the following description will focus on the generation mixed range SQ.
[0047]
For example, as shown in FIG. 6 (A), the partial display map composed of the area map DA1 to the area map DA4 corresponding to the mixed generation range SQ originally stored in the map data storage area 5B of the storage unit 5 by the navigation device 2. With respect to DAQ, as shown in FIG. 7A, the partial update display map DBQ composed of the area map DB1 to the area map DB4 corresponding to the generation mixed range SQ held by the map providing server 13 is the partial display. The contents of the area map DA2 and area map DA4 of the map DAQ and the area map DB2 and area map DB4 of the partial latest display map DBQ have been changed to the latest maps.
[0048]
Therefore, as shown in FIG. 8, the navigation device 2 performs the partial update based on the update area map data, so that the area map DB2 of the partial latest display map DBQ, the area map DA1 of the partial current display map DAQ, the area map DA3, A mixed map area DCQ mixed with the area map DA4 is generated, and the mixed map area DCQ is stored in the map data storage area 5B of the storage unit 5.
[0049]
Further, as shown in FIG. 6B, a partial current route map composed of an area map RA1 to an area map RA4 corresponding to the generation mixed range SQ originally stored in the map data storage area 5B of the storage unit 5 by the navigation device 2. For the data RQ, as shown in FIG. 7B, the partial latest route map data RBQ composed of the area maps RB1 to RB4 corresponding to the generation mixed range SQ held by the map providing server 13 is the partial display. The contents of the area map RA2 and area map RA4 of the route map data RAQ and the area map RB2 and area map RB4 of the partially updated route map data RBQ are changed to the latest maps.
[0050]
Here, in the navigation device 2, since the partial current route map data RQ and the partial latest route map data RBQ have different generations and the individual links L do not necessarily correspond, the partial latest route map data RBQ and the partial current route map data Both of the data RQ are stored in the map data storage area 5B of the storage unit 5.
[0051]
(3) Guide route display processing
Subsequently, for example, the navigation device 2 will explain in detail the guidance route display processing procedure when performing route guidance on the partial mixed display map DCQ corresponding to the generation mixed range SQ, with reference to the flowchart of FIG.
[0052]
That is, the control unit 3 of the navigation device 2 enters from the start step of the routine RT1 and proceeds to step SP31. In step SP31, as shown in FIGS. 10A and 10B, the control unit 3 performs partial update based on the start point PS and the end point PG specified on the partial mixed display map DCQ by the operation of the operation unit 7 by the user. The corresponding start point position TS and end point position TG on the route map data RBQ are set, and the process proceeds to the next step SP32.
[0053]
In step SP32, the control unit 3 specifies the route from the start point position TS to the end point position TG in the partial latest route map data RBQ (FIG. 10B) by the links LB12, LB19, LB45, LB47, LB49, and LB50. Based on the link string KB (LB12, LB19, LB45, LB47, LB49, LB50) obtained as a result, the guide route GB (FIG. 10A) is generated, and the process proceeds to the next step SP33.
[0054]
Here, in the navigation device 2, the generations of the region map RB2 (FIG. 10B) of the partial latest route map data RBQ and the region map DB2 (FIG. 10A) of the partial mixed display map DCQ match. On the other hand, the generation of the area map RB4 (FIG. 10B) of the partial latest route map data RBQ and the area map DA4 (FIG. 10A) of the partial mixed display map DCQ do not match.
[0055]
Therefore, when the navigation device 2 displays the guide route GB on the partial mixed display map DCQ based on the link row KB (FIG. 10A), the display route ER in the area map DA4 of the partial mixed display map DCQ. And the guide route GB may not match.
[0056]
On the other hand, in step SP33, as shown in FIG. 11A, the control unit 3 performs the partial mixed display map DCQ (FIG. 10A) corresponding to the links LB12, LB19, LB45, LB47, LB49, and LB50 constituting the link row KB. )) Is checked with respect to the area map DB2 and area map DA4, and the partial link string KB4 (links LB45, LB47, LB49, LB50) is selected from the partial mixed display map DCQ (FIG. 10B), and the next step SP34 is performed. Move.
[0057]
In step SP34, as shown in FIG. 12, the control unit 3 performs latitude and longitude for all nodes N19, N45, N47, N49, and N50 that connect the links of the partial link string KB4 (links LB45, LB47, LB49, and LB50). The obtained latitude and longitude are registered in the link conversion table TBL in association with all the links LB45, LB47, LB49, and LB50, and the process proceeds to step SP35.
[0058]
In this case, the control unit 3 calculates the latitude and longitude in the subsequent processes for the nodes N19, N45, N47, N49, and N50 of the links LB45, LB47, LB49, and LB50 (FIG. 10B) registered in the link conversion table TBL. There is no need to obtain it again, and the contents registered in the link conversion table TBL can be used.
[0059]
By the way, between the partial current route map data RAQ shown in FIG. 10 (C) and the partial latest route map data RBQ shown in FIG. 10 (B), although the generations are different, the position of each node is constant. Links LA31, LA33, LA35, LA36 (FIG. 10C) connecting the nodes of the partial current route map data RQ and each node of the partial latest route map data RBQ based on the latitude and longitude of each node LB45, LB47, LB49, and LB50 (FIG. 10B) correspond to each other.
[0060]
Therefore, in step SP35, the control unit 3 determines the link LA31 (FIG. 10C) of the partial current route map data RQ corresponding to the latitude and longitude registered for the link LB45 (FIG. 10B) of the link conversion table TBL, for example. The link LA31 is associated with the link LB45 and registered in the link conversion table TBL (FIG. 12).
[0061]
Similarly, in step SP35, the control unit 3 links the partial current route map data RQ corresponding to the registered latitude and longitude for the links LB47, LB49, and LB50 (FIG. 10B) of the link conversion table TBL. LA33, LA35, LA36 (FIG. 10C) can be specified, the links LA33, LA35, LA36 are associated with the links LB47, LB49, LB50, respectively, and registered in the link conversion table TBL (FIG. 12). The process proceeds to step SP36.
[0062]
In step SP36, as shown in FIG. 11B, the control unit 3 links LB45, LB47, LB47, LB47, and LB45 included in the region map RB4 (FIG. 10B) of the partial latest route map data RBQ based on the link conversion table TBL. LB49, LB50 are converted into links LA31, LA33, LA35, LA36 included in the area map RA4 (FIG. 10C) of the partial current route map data RAQ, and the links LA31, LA33, LA35, included in the area map RA4 are converted. A conversion link string KC (LB12, LB19, LA31, LA33, LA35, LA36) is generated using LA36 and the links LB12, LB19 included in the area map RB2, and the process proceeds to the next step SP37.
[0063]
In step SP37, as shown in FIG. 10D, the control unit 3 displays the latest guide route GB2 based on the converted link string KC (links LB12 and LB19) in the latest generation area map DB2 of the partial mixed display map DCQ. The current guide route GA4 is displayed on the basis of the converted link string KC (links LA31, LA33, LA35, LA36) in the current generation area map DA4 of the partial mixed display map DCQ, and the process proceeds to the next step SP38 to display the guide route display processing procedure. Exit.
[0064]
(4) Operation and effect
In the above configuration, when the navigation device 2 partially updates the map data stored in the map data storage area 5B of the storage unit 5, the navigation device 2 displays the virtual circle SC within a predetermined distance range centered on the point PH registered by the user. The estimated use range SE is set based on this, and the generation information in each area map of the estimated use range SE and the estimated use range SE is transmitted to the map providing server 13, so that the estimated use range SE from the map providing server 13. The update area map data corresponding to can be acquired, and the estimated use range SE can be partially updated using the update area map data.
[0065]
In this way, the navigation device 2 can automatically partially update the update area map data of the estimated usage range SE that is estimated to be frequently used by the user simply by registering the point PH representing the user's home position. it can.
[0066]
As a result, the navigation apparatus 2 can automatically partially update the update area map data of the estimated usage range SE, so that it is not necessary for the user to select an area to be partially updated.
[0067]
Furthermore, the navigation device 2 can automatically partially update the update area map data of the estimated usage range SE that is estimated to be frequently used by the user simply by registering the point PH representing the user's home position. It is possible to obtain the same result as when a region that seems to be frequently used by the user is optimally selected and partially updated.
[0068]
In addition, when the navigation device 2 partially updates the map data stored in the map data storage area 5B, the navigation device 2 confirms the generation information of each area in the estimated usage range SE and selects only the area that has not been updated. Thus, the partial update process can be efficiently performed in a shorter time without causing the user to be particularly conscious.
[0069]
By the way, when the navigation apparatus 2 performs route guidance from the area map DB2 to the area map DA4 of a different generation on the partial mixed display map DCQ corresponding to the generation mixture range SQ, the conversion link string KC (links LB12, LB19, LA31, Based on LA33, LA35, LA36), the area map DB2 uses the latest generation links LB12, LB19, and the area map DA4 uses the current generation links LA31, LA33, LA35, LA36. The latest guide route GB2 can be displayed, and the current guide route GA4 can be displayed on the area map DA4.
[0070]
The navigation device 2 also uses the area map DA4 of the partial mixed display map DCQ and the area map RB4 of the partial latest route map data RBQ used for route guidance even when the generations are different from each other and do not correspond to each other. Then, by displaying the current guide route GA4 using the current generation links LA31, LA33, LA35, LA36, the current guide route GA4 is made to correspond accurately to the partial mixed display map DCQ in the area map DA4 of the current generation. be able to.
[0071]
Thus, even when the generation of the area map DB2 and the generation of the area map DA4 are differently mixed in the partial mixed display map DCQ, the navigation device 2 is the latest guide route corresponding to the area map DB2 of the partial mixed display map DCQ. Since the current guidance route GA4 corresponding to GB2 and the area map DA4 can be accurately displayed, route guidance can be performed without giving misunderstanding or confusion to the user.
[0072]
According to the above configuration, the navigation apparatus 2 automatically registers the update area map data of the estimated usage range SE that is estimated to be frequently used by the user only by registering the point PH representing the user's home position. Can be updated.
[0073]
Further, even when the navigation device 2 automatically partially updates the update area map data of the estimated usage range SE provided from the map providing server 13, the area map DB2 and the area map DA4 (FIG. 10 (D)), the latest guidance route GB2 corresponding to the area map DB2 and the current guidance route GA4 corresponding to the area map DA4 can be accurately displayed.
[0074]
(5) Other embodiments
In the above-described embodiment, the case where the estimated usage range SE is set by the navigation device 2 and the update area map data of the estimated usage range SE is acquired from the map providing server 13 to perform the partial update has been described. The present invention is not limited to this, and the estimated use range SE may be set by the map providing server 13, and update region map data of the estimated use range SE may be provided to the navigation device 2.
[0075]
For example, as shown in FIG. 13, in step SP61, the control unit 11A of the computer 11 of the map update system 1 informs the navigation device 2 of the location PH representing the user's home position and the generation information for each area of the current display map DA. Request. In step SP51, SP52 and SP53, the control unit 3 of the navigation device 2 performs the same processing as steps SP1, SP2 and SP3 in the map data partial update processing procedure shown in FIG. The generation information for each area of the map DA is transmitted to the computer 11.
[0076]
In step SP62, the control unit 11A of the computer 11 receives the point PH and the generation information from the navigation device 2, and transmits them to the map providing server 13 via the Internet 12 in the form of relaying them as they are.
[0077]
The control unit 13A of the map providing server 13 receives the point PH and the generation information in step 71, and in step SP72, as in step SP4 (FIG. 4), for example, a predetermined radius 50 [km] centered on the point PH. It is estimated that the distance range is likely to be used by the user, this is set as a virtual circle SC, and all areas including the virtual circle SC are set as the estimated usage range SE.
[0078]
In steps SP73, SP63, SP55 and SP56, the map update system 1 performs the same processing as steps SP22, SP13, SP6 and SP7 in the map data partial update processing procedure shown in FIG.
[0079]
Thereby, in the map update system 1, the map providing server 13 receives the point PH representing the user's home position and the generation information for each area of the current display map DA from the navigation device 2, and the estimation centered on the point PH. Since the update area map data corresponding to the estimated usage range SE can be provided to the navigation device 2 by setting the usage range SE, it is not necessary to set the estimated usage range SE in the navigation device 2, and the The load on the navigation device 2 can be reduced.
[0080]
Further, in this case, in the map update system 1, the estimated use range SE set for each of a plurality of users by the map providing server 13 is totaled to construct a database, and the estimated use of the user is calculated using the total result based on the database. By setting the range SE, it is possible to more appropriately select a plurality of areas that are estimated to be frequently used by the user.
[0081]
Moreover, in the above-mentioned embodiment, although the case where the estimated use range SE was set based on the point PH representing the user's home position registered in advance was described, the present invention is not limited to this, The estimated usage range SE may be set based on an arbitrarily designated point.
[0082]
Furthermore, in the above-described embodiment, the case where the estimated usage range SE is set based on the predetermined distance range centered on the point PH representing the user's home position registered in advance has been described. In addition to this, in addition to a predetermined distance range (for example, a radius of 50 [km]) centered on a point PH representing the user's home position registered in advance, a major city (for example, a government-designated city, etc.) within the predetermined distance range ) And a predetermined distance range (for example, a radius of 30 [km]) from the center, or a predetermined distance range (for example, a radius of 10 [km]) from the main sightseeing spot may be set.
[0083]
Furthermore, in the above-described embodiment, the case where the estimated usage range SE is set based on the predetermined distance range centered on the point PH representing the user's home position registered in advance has been described. However, the present invention is not limited to this, and all the regions including the region (for example, Kanto region) to which the point PH belongs may be set as the estimated usage range SE.
[0084]
Furthermore, in the above-described embodiment, the storage unit 5 as the display map storage unit, the storage unit 5 as the route map data storage unit, the control unit 3 as the route search unit, and the control unit as the display generation recognition unit 3 and the control unit 3 as the display control means have been described as constituting the navigation device 2 as the map display device, but the present invention is not limited to this, and the display map storage means having other various circuit configurations The map display device may be constituted by the route map data storage means, route search means, display generation recognition means, and display control means.
[0085]
【The invention's effect】
  As described above, according to the present invention, the latest display mapOn the map corresponding to the dataDisplays the latest guide route based on the latest route map data and displays the current mapOn the map corresponding to the dataCan display the current guide route based on the current route map data, so the correct guide route according to the displayed mapPresentMap display apparatus and map display method capable of accurately guiding a user and thus correctly displaying a guidance route on a map even when partial updating is performedNavigation deviceCan be realized.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing a configuration of a map update system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram for explaining the configuration of field map data.
FIG. 3 is a schematic diagram for explaining the configuration of the latest map data.
FIG. 4 is a flowchart showing a map data partial update processing procedure;
FIG. 5 is a schematic diagram for explaining setting of an estimated usage range;
FIG. 6 is a schematic diagram showing a configuration of partial local map data.
FIG. 7 is a schematic diagram illustrating a configuration of partial latest map data.
FIG. 8 is a schematic diagram showing a partial mixed display map;
FIG. 9 is a flowchart showing a guide route display processing procedure.
FIG. 10 is a schematic diagram for explaining a link and a guide route.
FIG. 11 is a schematic diagram for explaining link string conversion;
FIG. 12 is a schematic diagram illustrating a link conversion table.
FIG. 13 is a flowchart showing a map data partial update processing procedure in another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Map update system, 2 ... Navigation apparatus, 3 ... Control part, 5 ... Memory | storage part, 8 ... Communication processing part, 11 ... Computer, 13 ... Map provision server.

Claims (5)

Mixed map data storage means for storing mixed map data in which at least two types of map data of the latest map data and local map data of different generations are partially mixed;
Route map data storage means for storing the latest route map data corresponding to the latest map data for all regions and the current route map data corresponding to the field map data;
Route search means for searching for a guide route from an arbitrary start point position to an end point position based on the latest route map data;
When the guide route searched by the route search means is superimposed on the map based on the mixed map data and displayed on the display means, the latest guide route based on the latest route map data is displayed in the portion corresponding to the latest map data. Display control means for converting the guide route from the latest guide route based on the latest route map data into a current guide route based on the current route map data and displaying the portion in the portion corresponding to the local map data; A map display device. The current route map data and the latest route map data are
It is composed of a plurality of links corresponding to each road of the local map data and the latest map data,
The route search means
Search the guide route by connecting the link of the latest route map data from the start point position to the end point position,
The display control means includes
For the portion corresponding to the local map data in the guide route, the link based on the latest route map data is converted into the link of the current route map data corresponding to the link, thereby the latest guide route. The map display device according to claim 1, wherein the map display device is converted into the current guide route. The current route map data is
It is composed of a plurality of nodes indicating a certain point in the local map data and a plurality of links corresponding to the roads in the local map data and connecting the nodes.
The latest route map data is
It is composed of a plurality of nodes indicating the certain point in the latest map data and a plurality of links corresponding to roads in the latest map data and connecting the nodes.
The route search means
Search the guide route by configuring a link string connecting the links so as to follow the start point position to the end point position on the latest route map data,
The display control means includes
The latest guide route is converted to the current guide route by converting the link corresponding to the local map data in the link row to the link of the current route map data connecting the same point with the link. The map display device according to claim 2. A route search step for searching for a guide route from an arbitrary start point position to an end point position based on the latest route map data corresponding to the latest map data for all regions;
The guide route searched in the route search step is displayed on the display unit by superimposing it on a map based on mixed map data in which at least two types of map data of the latest map data and local map data of different generations are partially mixed. At the time, the latest guide route based on the latest route map data is displayed in the portion corresponding to the latest map data, and the latest route based on the latest route map data is displayed in the portion corresponding to the local map data. A map display method comprising: a display control step of converting and displaying a guide route to a current guide route based on current route map data corresponding to the local map data. Mixed map data storage means for storing mixed map data in which at least two types of map data of the latest map data and local map data of different generations are partially mixed;
Route map data storage means for storing the latest route map data corresponding to the latest map data for all regions and the current route map data corresponding to the field map data;
Positioning means for positioning the current position based on predetermined positioning information;
Route search means for searching for a guide route from an arbitrary start point position to an end point position based on the latest route map data;
When the guide route is superimposed on the location corresponding to the current position in the map based on the mixed map data and displayed on the display means, the latest guide based on the latest route map data is displayed in the portion corresponding to the latest map data. A display that displays a route and converts the guide route from the latest guide route based on the latest route map data to a current guide route based on the current route map data in a portion corresponding to the local map data. And a navigation device.

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