JPWO2007023897A1 - Map display device, map display method, map display program, and computer-readable recording medium - Google Patents

Abstract

Even if the user wants to use the navigation device before the update of all necessary map data is completed, the user must wait until the update is completed. The map display device has map data of a map composed of a plurality of regions. Then, a map of the searched area is displayed by searching a predetermined area among the plurality of areas. First, the frequency calculation unit (101) obtains a search frequency for a plurality of regions. When updating the map data of a plurality of regions, the update unit (102) preferentially updates the map data of the region having a high search frequency obtained by the frequency calculation unit (101). A control part (103) receives the display process of map data, when the map data of the area where search frequency is high is updated by the update part (102), before updating the map data of another area.

Description

  The present invention relates to a map display device, a map display method, a map display program, and a computer-readable recording medium that search a predetermined region from a map composed of a plurality of regions and display a map of the searched region. . However, the use of the present invention is not limited to the above-described map display device, map display method, map display program, and computer-readable recording medium.

  Some conventional navigation apparatuses have map data divided into map data for a plurality of regions, and read and use the map data for a necessary region. The amount of map data is considerably large when the map data of all regions such as Japan are combined. Therefore, if the map data is updated for all regions when the map data needs to be updated, the update takes time.

  Therefore, map data is divided and stored for each mesh, which is the map data division unit, and map data is updated in units of meshes as needed, rather than updating everything when updating map data. There was a map data storage device that can be updated (see, for example, Patent Document 1). Further, there has been a navigation device that uses a certain map data as original data, creates a difference data such as a road condition with respect to the original data as difference data, and updates the map data by using this difference data (for example, see Patent Document 2) .)

JP 2001-229369 A JP 2004-198321 A

  However, when the update time of the map data comes, all map data or map data of all necessary areas will be updated. In the case of updating the map data divided into a plurality of regions or using the difference data, in any case, the navigation device cannot be used until all necessary map data is updated. However, since the amount of map data is enormous, even if it is desired to use the navigation device before the update of all necessary map data is completed, there is a problem that it is necessary to wait until the update is completed. Another example is the problem that the user has to specify and update the area even though he knows where the area is needed.

  The map display device according to the invention of claim 1 has map data of a map composed of a plurality of areas, and displays a map of a searched area by searching a predetermined area among the plurality of areas. A frequency calculating means for obtaining a search frequency for the plurality of regions, and map data for a region having a high search frequency obtained by the frequency calculating means when updating the map data for the plurality of regions. Update means for preferentially updating, and control means for accepting display processing of map data before updating map data for other areas when the map data for areas having a high search frequency is updated by the update means; It is characterized by providing.

  According to a seventh aspect of the present invention, there is provided a map display method comprising map data of a map composed of a plurality of areas, and displaying a map of the searched area by searching a predetermined area among the plurality of areas. A map display method for calculating a search frequency for the plurality of regions, and a map of a region having a high search frequency obtained by the frequency calculation step when updating the map data of the plurality of regions. An update process that preferentially updates data, and a control process that accepts a display process of map data before updating map data of another area when map data of an area with a high search frequency is updated by the update process It is characterized by including these.

  A map display program according to an invention of claim 8 causes a computer to execute the map display method according to claim 7.

  According to a ninth aspect of the invention, a computer-readable recording medium records the map display program according to the eighth aspect.

FIG. 1 is a block diagram showing a functional configuration of a map display device according to an embodiment of the present invention. FIG. 2 is a flowchart showing processing of the map display method according to the embodiment of the present invention. FIG. 3 is a block diagram showing a functional configuration of the map display device according to the embodiment of the present invention. FIG. 4 is a block diagram illustrating the configuration of map data. FIG. 5 is a flowchart for explaining map data search processing. FIG. 6 is a flowchart for explaining map data update processing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Frequency calculation part 102 Update part 103 Control part 104 Instruction part 105 Search part 106 Display part 300 Navigation control part 301 Operation part 302 Display part 303 GPS receiver 304 Movement speed sensor 305 Angular speed sensor 306 HDD
307 Communication unit 308 Point search unit 309 Route search unit 310 Route guidance unit

  Exemplary embodiments of a map display device, a map display method, a map display program, and a computer-readable recording medium according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a functional configuration of a map display device according to an embodiment of the present invention. The map display device of this embodiment has map data of a map composed of a plurality of regions. Then, a map of the searched area is displayed by searching a predetermined area among the plurality of areas. The frequency calculation unit 101, the update unit 102, the control unit 103, the instruction unit 104, the search unit 105, and the display unit 106 are configured.

  The frequency calculation unit 101 obtains a search frequency for a plurality of regions. The frequency calculation unit 101 can also obtain the search frequency of this area in association with the area code of each area. When updating the map data of a plurality of regions, the update unit 102 preferentially updates the map data of the region having a high search frequency obtained by the frequency calculation unit 101. When the update unit 102 updates the map data of a region having a high search frequency, the control unit 103 accepts a map data display process before updating the map data of another region.

  The instruction unit 104 instructs display processing of map data. In this case, when the map data display process is instructed by the instruction unit 104, the control unit 103 updates the map data of the region where the search frequency is high, and then prioritizes the update of the map data of other regions. Execute map data display processing. The control unit 103 causes the update unit 102 to update the map data in another region when the map data display process is in a standby state after the instruction unit 104 is instructed to display the map data. You can also.

  The search unit 105 searches for a predetermined area among a plurality of areas. The search unit 105 can also hold the searched search history. In this case, the frequency calculation unit 101 obtains the search frequency of each region from the search history held by the search unit 105. The display unit 106 displays the map data of the area searched by the search unit 105.

  FIG. 2 is a flowchart showing processing of the map display method according to the embodiment of the present invention. First, the search unit 105 searches for a predetermined area among a plurality of areas (step S201). Next, the display part 106 displays the map data of the area searched by the search part 105 (step S202). The frequency calculation unit 101 calculates the search frequency for a plurality of regions (step S203).

  Here, it is determined whether to update the map data (step S204). If the map data is not updated (step S204: No), the series of processes is terminated. When updating the map data (step S204: Yes), the update unit 102 updates the map data of the region with the high search frequency obtained by the frequency calculation unit 101 (step S205).

  Next, the control unit 103 accepts map data display processing (step S206). For example, when the map display device is a navigation device, an instruction input for navigation processing is accepted. For example, when map data display processing is instructed by the instruction unit 104 that instructs map data display processing, the map data display processing may be executed. Next, the map data of another area is updated (step S207).

  According to the embodiment described above, when updating the map data, it is possible to display the map data before updating the map data of other areas after updating the areas with high search frequency first. . For example, a map display device such as a navigation device may be used mainly in the vicinity of an area where a user lives. At this time, if all the regions are not updated, if the region having a high search frequency is updated, there is often no particular problem in use even if the map data of the other region is not updated. Thus, according to this embodiment, it is possible to update the map data as soon as possible while ensuring a usable state, and to prevent the user from waiting more than necessary.

  FIG. 3 is a block diagram showing a functional configuration of the map display device according to the embodiment of the present invention. The map display device includes a navigation control unit 300, an operation unit 301, a display unit 302, a GPS receiver 303, a moving speed sensor 304, an angular velocity sensor 305, an HDD 306, a communication unit 307, a point search unit 308, a route search unit 309, and a route guidance unit. 310.

  The navigation control unit 300, the GPS receiver 303, the point search unit 308, the route search unit 309, and the route guidance unit 310 are, for example, a CPU (Central Processing Unit) that executes predetermined arithmetic processing, and a ROM ( It can be realized by a microcomputer configured by a read only memory (RAM) and a RAM (Random Access Memory) functioning as a work area of the CPU.

  The navigation control unit 300 controls the entire map display device. The operation unit 301 includes operation buttons, a remote control, a touch panel, and the like. The navigation control unit 300 implements the frequency calculation unit 101, the update unit 102, the control unit 103, the instruction unit 104, and the search unit 105 shown in FIG. The display unit 302 includes a liquid crystal display, an organic EL display, and the like, and corresponds to the display unit 106 shown in FIG.

  The GPS receiver 303 receives radio waves from GPS satellites and acquires the vehicle position information. Here, the vehicle position information is obtained by receiving a radio wave from a GPS satellite and obtaining a geometric position with respect to the GPS satellite, and can be measured anywhere on the earth. The radio wave is generated using an L1 radio wave carrying a C / A (Coarse and Access) code and a navigation message with a carrier wave of 1.57542 MHz. Thereby, the current position (latitude and longitude) of the vehicle is detected. Further, information collected by various sensors such as a moving speed sensor 304 and an angular speed sensor 305 described later may be taken into consideration.

  Then, based on the own vehicle position information acquired from the GPS receiver 303 and the map data stored in advance, the navigation control unit 300 outputs to the display unit 302 which position on the map is traveling.

  The movement speed sensor 304 detects the movement speed of the apparatus main body. When the apparatus main body is a vehicle, it is detected from the output side shaft of the transmission. The angular velocity sensor 305 detects the angular velocity when the host vehicle is rotating, and outputs angular velocity data, relative azimuth data, and data indicating the azimuth change amount.

  The HDD 306 is a hard disk drive, and executes data writing and reading with a nonvolatile magneto-optical disk. The HDD 306 stores map data, which will be described later, and displays a map on the display unit 302 when the navigation control unit 300 reads out the map data. And the navigation control part 300 updates the map data memorize | stored in HDD306 as needed.

  The communication unit 307 communicates with an external server via a wireless communication interface, and reads map data stored in the external server. The read map data is updated by the HDD 306. Moreover, the communication part 307 reads the update date of the map data of a server. The read update date and time is compared with the update date and time of the map data in the HDD 306 by the navigation control unit 300, and is used to determine whether or not to update the map data.

  The point search unit 308 searches for an arbitrary point based on the information input from the operation unit 301, and outputs this to the display unit 302. Further, the route search unit 309 calculates an optimal route to the point based on the point information obtained by the point search unit 308.

  Further, the route guidance unit 310 generates real-time route guidance information based on the information obtained by the route search unit 309 and the vehicle position information.

  FIG. 4 is a block diagram illustrating the configuration of map data. The navigation control unit 300 accesses the HDD 306, reads the map data 400, and displays it on the display unit 302. In addition, the navigation control unit 300 accesses the HDD 306 and executes update processing of the map data 400 via the communication unit 307.

  The HDD 306 stores map data 400, a search history 410, and a search frequency 420. The map data 400 is map data used for navigation. The map data of each area indicated by the overall data 401, the first area 402, the second area 403, the third area 404, and the fourth area 405, It is constituted by. For example, in the case of a map of Japan, these regions can be Hokkaido, Tohoku, Kanto, Chubu, and so on. In addition, in the case of all the figures in Europe, the countries can be Germany, France, Spain, and so on.

  The navigation control unit 300 searches for map data in any region. The navigation control unit 300 displays the map on the display unit 302 by reading out the entire data 401 and the map data of the searched area. The local search status is stored in the search history 410. When storing the search history 410, the area code of the searched area is also saved.

  Then, according to the contents of the search history 410, the frequency of searching for each region is stored as the search frequency 420. Here, the search frequency 420 for each region is calculated using the area code stored in the search history 410. This search frequency 420 is used as data when updating the map data 400 for each region. For example, the number of searches in the searched area can be incremented by 1, and the number of searches can be stored as the search frequency 420. Specifically, the first area 402 may be stored 40 times, the second area 403 may be stored 5 times, the third area 404 may be stored 0 times, and the fourth area 405 may be stored 2 times.

  A case where the first area 402 is searched will be described as an example. In this case, the navigation control unit 300 searches the entire data 401 and the first region 402 and displays them on the display unit 302. A history that the first area 402 has been searched is stored in the search history 410. Then, the search frequency 420 is updated according to the search history 410. The same applies when searching for the second region 403, the third region 404, and the fourth region 405. Further, the number of areas of the map data 400 is not four, but may be five or more or three or less.

  Next, update of the map data 400 will be described. The navigation control unit 300 accesses an external server via the communication unit 307 and confirms the latest status of the map data 400. When it is determined that the map data 400 needs to be updated, the search frequency 420 is confirmed. Then, the navigation control unit 300 determines to update the area indicated by the search frequency 420 as having the highest search frequency. First, the entire data 401 is updated, and the region with the highest search frequency is updated. For example, when the frequency of the first area 402 is the highest, the entire data 401 and the first area 402 are updated.

  After updating the entire data 401 and the region with the highest search frequency, the navigation control unit 300 resumes the navigation process. In addition, when the navigation process is not executed, the update is executed for other regions. For example, when the first region 402 is assumed to have the highest search frequency, the first region 402 has been updated, and therefore, according to the search frequency, the second region 403, the third region 404, and the fourth region 405 are updated. Update in the order.

  FIG. 5 is a flowchart for explaining map data search processing. First, the navigation control unit 300 searches for an area to be displayed (step S501). Next, the display unit 302 displays the area searched by the navigation control unit 300 (step S502). For example, when the searched area is the first area 402, the first area 402 is displayed.

  Next, the searched area is stored as a search history 410 (step S503). Next, the search frequency 420 for each region is calculated from the search history 410 by reading the stored search history 410 (step S504). For example, the search frequency 420 is calculated by counting the number of searches in each region. Then, the calculated search frequency 420 is stored (step S505).

  FIG. 6 is a flowchart for explaining map data update processing. First, the navigation control unit 300 arranges the order of regions in which the map data 400 is updated in the order of the search frequency 420 (step S601). That is, the map data of each region is arranged in order from the region where the search frequency 420 is high, specifically, the region where the number of searches is high, to the region where the search frequency is high.

  Next, the navigation control unit 300 updates the entire data 401 (step S602). Then, the first map data is updated (step S603). For example, when the search frequency 420 of the first region 402 is highest, the first region 402 is updated first because the first region 402 is arranged at the first position.

  Next, the navigation control unit 300 permits navigation processing (step S604). That is, navigation processing can be performed before the update is completed for all regions. Therefore, when the first map data is updated, for example, a vehicle route search process and a route guidance process can be executed. Then, when the user instructs execution of the navigation process, this process is executed.

  Next, the navigation control unit 300 updates the next map data (step S605). For example, when the search frequency 420 of the second area 403 is the next highest, the second area 403 is updated here. And it is determined whether it updated about all the areas (step S606). When not updated (step S606: No), it returns to step S605 and updates the map data 400 about the next area. If it has been updated (step S606: Yes), the series of processing ends. As described above, the map data 400 is updated in order from the region where the search frequency 420 is high.

  As a situation of updating, the case of updating via the communication unit 307 in the vehicle has been described as an example, but a case of updating at home can also be considered. In the case of updating by car, the navigation operation is not stopped. When the search data is not used, it is possible to update the map data 400 while performing a navigation operation. During the data update, it is impossible to search the updated area. However, if the update of the map data 400 is completed, it will operate without problems.

  When updating at home, the navigation operation is completely stopped. Therefore, data is updated in descending order of priority. At least, when the update of one area (one block) is completed, the navigation operation can be started. At this time, the navigation operation can be performed without any problem including a map and a search.

  According to the embodiment described above, it is possible to shift to a navigation operation when the map data of a necessary area is updated without updating the map data for all areas. And a navigation apparatus can be used using required map data, without waiting for the update of the map data which is comparatively unnecessary. And the update process of map data can be advanced while not using the navigation apparatus. Thus, map data can be updated according to a user's living area.

  The map display method described in the present embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

[0002]
Map data for all regions will be updated. When the map data is divided into a plurality of regions and updated, or when difference data is used, the navigation device cannot be used until all necessary map data is updated. However, since the amount of map data is enormous, even if it is desired to use the navigation device before the update of all necessary map data is completed, there is a problem that it is necessary to wait until the update is completed. Another example is the problem that the user had to specify and update the area, even though the required area is mostly known in the area where he lives.
Means for Solving the Problems [0006]
The map display device according to the invention of claim 1 has map data of a map composed of a plurality of areas, and displays a map of a searched area by searching a predetermined area among the plurality of areas. A frequency calculating means for obtaining a search frequency for the plurality of regions, and map data for a region having a high search frequency obtained by the frequency calculating means when updating the map data for the plurality of regions. Update means for preferentially updating, and control means for accepting display processing of map data before updating map data for other areas when the map data for areas having a high search frequency is updated by the update means; Instruction means for instructing display processing of the map data, and the control means has a high search frequency after the instruction means instructs the display processing of the map data. If the display process of the map data area is in a standby state, characterized in that to update the map data of the other regions in the updating means.
[0007]
According to a seventh aspect of the present invention, there is provided a map display method comprising map data of a map composed of a plurality of areas, and displaying a map of the searched area by searching a predetermined area among the plurality of areas. A map display method for calculating a search frequency for the plurality of regions, and a map of a region having a high search frequency obtained by the frequency calculation step when updating the map data of the plurality of regions. An update process for preferentially updating data, and when map data for a region having a high search frequency is updated by the update process, a reception process for receiving an instruction for a display process of map data; and After the display processing instruction is received, when the display processing of the map data of the region having the high search frequency is in a standby state, the map data of another region is updated. Characterized in that it comprises a new step.
[0008]
A map display program according to an invention of claim 8 causes a computer to execute the map display method according to claim 7.
[0009]
A computer-readable recording medium according to the invention of claim 9 is a computer-readable recording medium.

Claims (9)

A map display device having map data of a map composed of a plurality of regions, displaying a map of the searched region by searching a predetermined region among the plurality of regions,
A frequency calculating means for obtaining a search frequency for the plurality of regions;
When updating the map data of the plurality of regions, an update unit that preferentially updates the map data of the region having a high search frequency obtained by the frequency calculation unit;
When the map data of a region having a high search frequency is updated by the updating unit, a control unit that receives a display process of map data before updating the map data of another region;
A map display device comprising: Instructing means for instructing display processing of the map data,
When the display means is instructed to display the map data by the instructing means, the control means updates the map data of the area where the search frequency is high, and then prioritizes the update of the map data of other areas. The map display device according to claim 1, wherein a map data display process is executed.   The control means causes the updating means to update the map data of another region when the display processing of the map data is in a standby state after the display processing of the map data is instructed by the instruction means. The map display device according to claim 1. Search means for searching for a predetermined area among the plurality of areas;
Display means for displaying map data of the area searched by the search means;
The map display device according to claim 1, further comprising:   2. The map display apparatus according to claim 1, wherein the search means holds a searched search history, and the frequency calculation means obtains a search frequency of each region from the search history held by the search means. .   The map display device according to claim 1, wherein the frequency calculation unit obtains a search frequency of the area in association with an area code of the area. A map display method having map data of a map composed of a plurality of areas, displaying a map of the searched area by searching a predetermined area among the plurality of areas,
A frequency calculating step for obtaining a search frequency for the plurality of regions;
When updating the map data of the plurality of regions, an update step of preferentially updating the map data of the region having a high search frequency obtained by the frequency calculation step;
When the map data of a region having a high search frequency is updated by the updating step, a control step of receiving a display process of map data before updating the map data of another region;
The map display method characterized by including.   A map display program for causing a computer to execute the map display method according to claim 7.   A computer-readable recording medium on which the map display program according to claim 8 is recorded.

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