JP2008064617A - Apparatus, method, and program for map plotting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map plotting apparatus and a method capable of making branch destinations at a branch point easily recognized on a plotted map and provide a map plotting program. <P>SOLUTION: A road in which a mobile body is moving on the basis of current location information acquired at a current location acquisition part 1 is specified on the basis of map information stored in a map information storage part 3. In the case where the mobile body travels in the specified road in a traveling direction determined at a part 4 for determining the approach of signs of regional location names, a part 5 for acquiring the locations of regional location names acquires area names or point names in the regions of branch destinations of the road from a part 2 for storing regional guidance sign information and acquires the locations of the area names or the point names from the map information storage part 3. A display part 6 creates and displays a map for branch region verification in which the point names or the area names indicating the current location and the regions of the branch destinations are superposes on the locations of the area names or the point names. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a map display device and method, and a map display program for presenting, to a driver of a mobile object, a map when the mobile object is moving on the map where the mobile object is moving.

  Conventionally, as a navigation device that provides route guidance to a driver of a vehicle, a navigation device that displays a direction guide sign installed on a road with a GIF (Graphic Interchange Format) image or the like when the vehicle approaches a branch point. It is known (see Patent Document 1 below).

When the vehicle approaches the direction guidance signboard in the vicinity where the direction guidance signboard is installed from the direction in which the content of the direction guidance signboard on the road on which the vehicle is traveling can be seen while the vehicle is traveling, The display including the corresponding contents can be performed.
JP 2001-311625 A

  However, the navigation device simply displays the GIF image similar to the direction guidance signboard on the navigation device, and does not display the location of the place name of the direction guidance signage. Therefore, when checking the location of the place name on the direction signboard on the map, the driver can change the scale or scroll to the detailed map by operating the vehicle occupant on the map displayed on the navigation device. It was necessary to search for the same place name as the direction signboard.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and provides a map display device and method, and a map display program that can easily check a branch destination at a branch point on a display map. Objective.

  In order to solve the above-described problems, the present invention displays a branch direction confirmation map in which a point name or a region name indicating the current position of a moving object and a direction of a branch destination is superimposed on the region name or the position of the point name. .

  According to the present invention, the map for confirming the branch direction in which the location name or the region name indicating the current position of the mobile body and the direction of the branch destination is superimposed on the location name or the location of the location name is displayed. The branch destination at the branch point can be easily confirmed on the display map without causing the occupant to perform operations such as the above.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
The present invention is applied to, for example, the map display device according to the first embodiment configured as shown in FIG. The map display device is mounted on a vehicle (moving body) and includes a map in which a region name or a point name in a direction related to the current position of the vehicle and the traveling direction of the vehicle is superimposed on the position of the region name or the point name. A branch direction confirmation map is displayed.

  Hereinafter, the configuration and operation of the map display device according to the first embodiment will be described.

  As shown in FIG. 1, the map display device includes a current location acquisition unit (current position acquisition unit) 1, a direction guide signboard information storage unit (direction information storage unit) 2, and a map information storage unit (map information storage unit) 3. The area name signboard approach determination unit 4, the area name position acquisition unit 5, and the display unit 6 are provided. In addition, although demonstrated below, the direction name signboard approach judgment part 4, the direction name name position acquisition part 5, and the display part 6 are corresponded to a map preparation means and a display means. The information processing in the current location acquisition unit 1, the direction name signboard approach determination unit 4, the direction name name position acquisition unit 5, and the display unit 6 in the map display device is realized by a map display program executed by an in-vehicle computer. It is.

  The map information storage unit 3 stores map information including road link information indicating the road itself and road node information indicating the end points of the road link. This road node information has a position defined by latitude and longitude on the map, and road link information is stored in combination with road node information that is an end point of each link, and a number that identifies it from other road link information. It has been added. Further, the map information includes a place name to be displayed for each scale of the map based on the place name hierarchy determined by the residence classification. For example, in the map information, a prefecture name is displayed as a regional name in a wide area map, and a municipality is displayed as a regional name in a middle area map.

  The direction guidance signboard information storage unit 2 includes road link information indicating a road on which the direction guidance signboard is installed, approach direction information that is road node information indicating a traveling direction of a vehicle in which the contents of the direction guidance signboard are visible, and direction guidance. The direction information indicating the area name or the point name described on the signboard is stored as the direction guide signboard information for each number of the direction guide signboard.

  Here, the approach direction information of the direction guidance signboard information records the position of the road node in the direction of entering the road link that is currently traveling as the approach direction. For example, as shown in FIG. 2, the end points (nodes) of road link C are point A (latitude 139 degrees 37 minutes 59 seconds 136, longitude 35 degrees 19 minutes 35 seconds 200) and point B (latitude 139 degrees 37 minutes). 57 seconds 63, longitude 35 degrees 19 minutes 34 seconds 136), and when the direction guide sign D installed at the point B is seen from the direction of the point A, the approach direction information about the direction guide sign D is the latitude of the point A , Become longitude. Moreover, the road link information of the direction guidance signboard information in this case is the road link C number.

  The current location acquisition unit 1 receives radio waves transmitted from a plurality of positioning satellites by a GPS (Global Positioning System) antenna, and acquires the current position of the vehicle based on the time difference between the plurality of radio waves. The current location acquisition unit 1 supplies current location information indicating the current location of the vehicle by latitude and longitude to the direction name signboard approach determination unit 4.

  The direction name signboard approach determination unit 4 is a direction in which the vehicle can see the contents of the direction guide signboard from the current position information supplied from the current position acquisition unit 1 and the direction guide signboard information stored in the direction guide signboard information storage unit 2. It is determined whether the vehicle is approaching to a position where the direction guide sign can be seen. The area name signboard approach determination unit 4 first determines, from the map information storage unit 3, a road link number indicating a road that has traveled a predetermined distance (for example, about 100 meters) from the current position, and the road link. The road node in the direction of entering is acquired as the approach direction. At this time, the direction place name signboard approach determination unit 4 obtains the actual traveling direction from a plurality of current position information that moves back and forth in time, and road link information that is several hundred meters ahead of the currently traveling road link information. To get. Among the road link information, the road link information and the road name that are currently running are the same, the road link information and the road type that are currently running are the same, and the road link that is currently running Then, road link information that satisfies the condition that the connection angle of the road link of the travel destination is smaller than a predetermined value is acquired, and the road link information that has progressed along the road from the road link information that is currently traveling is obtained.

Next, the area name signboard approach determination unit 4 matches the road link number of the direction guide signboard information with the road link number that has traveled along the acquired road, and the approach direction (road node) is the progress of the direction guide signboard information. Search for matching direction information. As a result of the search, if the road link and road node (traveling direction) acquired from the current position information are stored as the direction guidance signboard information, the vehicle travels from the direction where the direction guidance signboard can be seen, and the direction guidance is provided. Judge that it is approaching to the position where the sign can be seen. Then, the direction name signboard approach determination unit 4 supplies information for identifying the direction guide signboard where the vehicle is approaching to the direction name name position acquisition unit 5.
If the direction name signboard approach determining unit 4 determines that the vehicle is approaching from the direction in which the direction guide sign is visible, the area name position acquisition unit 5 is the area name or point name described in the direction guide signboard. Get the center position of. At this time, the area name position acquisition unit 5 uses the area information (area name or point name) corresponding to the identification number of the direction guide sign supplied by the area name signboard approach determination unit 4 as a search key, and the map information storage unit 3 To obtain the center position of the area name or the point name.

  The display unit 6 includes a liquid crystal display installed at a position visible from the driver, an image generation circuit, and the like, and includes a map including area information (region name or point name) related to the current position of the vehicle and the traveling direction of the vehicle. A branch direction confirmation map including and is displayed. As shown in FIG. 4A, the display unit 6 acquires a map 10 around the vehicle from the map information storage unit 3 with the current position of the vehicle acquired by the current location acquisition unit 1 as a predetermined position. Then, when the vehicle is at a position where the direction guidance sign can be seen toward the direction guidance signboard, the display unit 6 sends the area name or point name of the direction information and the center of the area name or point name from the direction place name position acquisition unit 5. Get the position. Then, as shown in FIGS. 4C to 4E, the display unit 6 displays the area name 13 indicated by the direction guide signboard 20 as shown in FIG. 4B on the map 10 including the vehicle 11. A branch direction confirmation map 10 ′ displayed at the center position of the area name 13 is displayed. FIG. 4B is a diagram showing a direction guide signboard that is actually installed, and is not displayed on the display unit 6.

  When displaying the branch direction confirmation map 10 ′ including the area name or point name indicated by the direction guide signboard 20, the display unit 6 displays the area name 13 together with the elliptical emphasis area that emphasizes the display content of the area name 13. It is desirable to display. Further, as shown in FIGS. 4C to 4E, the branch direction confirmation map 10 ′ including the direction guide sign display 12 in which the description content of the actually installed direction guide sign 20 is superimposed on the map. May be displayed. Furthermore, as shown in FIG. 4 (d), adjacent to the branch direction confirmation map 10 ′ in which the area name 13 and the direction guide sign display 12 are superimposed on the map 10, the branch direction confirmation map 10 ′ is adjacent. Alternatively, a map 14 having the same scale as the map 10 shown in FIG. 4A may be displayed. As shown in FIG. 4E, the branch direction confirmation map 10 ′ in the form of a bird's-eye view map that is a three-dimensional image. May be displayed.

  By performing the display of FIG. 4D, the area name described in the direction guide sign by comparison with the map 10 that does not include the area name 13 displayed before the branch direction confirmation map 10 ′ is displayed. Alternatively, the location of the spot name can be confirmed. Further, by performing the display of FIG. 4E, it is possible to confirm the detailed geography of the branch point where the vehicle approaches and to confirm the position of the area name or the point name indicated on the direction guide signboard.

  Next, an operation of displaying the branch direction confirmation map 10 ′ by the map display device described above will be described.

  When the engine of the vehicle is started and the map display device is activated, the map display device repeats the processes of steps S1 to S6 every predetermined time. First, in step S1, the map display device acquires the current position of the vehicle by the current position acquisition unit 1, and the road when the area name signboard approach determination unit 4 has traveled a predetermined distance from the current position of the vehicle. The link number and the approach direction (road node information) to the road link are acquired from the map information storage unit 3.

  In the next step S2, the direction name signboard approach determination unit 4 of the map display device can see the road link information and the traveling direction acquired in step S1, and the direction guide signboard stored in the direction guide signboard information storage unit 2 can be seen. Compared with the road link information to determine that the vehicle is approaching the direction guidance signboard and the traveling direction, the vehicle is traveling in the direction where the contents of the direction guidance signboard can be seen, and the vehicle can be seen the direction guidance signboard Judge whether it is close to the position. If the vehicle approaches the direction guide sign and it is determined that the direction guide sign is visible, the process proceeds to step S4, and if not, the process proceeds to step S3.

  In step S3, the map display device displays a map 10 as shown in FIG. 4A with the current position of the vehicle as a predetermined position.

  On the other hand, in step S4, the direction name signboard approach determining unit 4 of the map display device supplies a number identifying the direction guide signboard determined to be approaching in step S2 to the direction name name position acquiring unit 5, The place name position acquisition unit 5 acquires the center position of the area name or the point name described on the direction guide signboard.

  In the next step S5, the area name position acquisition unit 5 supplies the center position of the area name or the point name described in the direction guide sign acquired in step S4 to the display unit 6, and the display unit 6 causes the area A map including the center position of the name or the point name is acquired from the map information storage unit 3, and the area name or the point name of the center position supplied from the direction name position acquisition unit 5 is acquired from the direction guidance signboard information storage unit 2. . And the display part 6 displays the vehicle 11 in the present position as shown in FIG.4 (c) thru | or (e) from the map 10 shown to Fig.4 (a), and the area name which a direction guidance signboard points or A branch direction confirmation map 10 ′ in which the area name 13 is displayed at the center position of the point name is displayed.

  In step S6 after step S3 or after step S5, the map display device determines whether or not to end the process depending on whether the vehicle engine is stopped or the power of the map display device itself is turned off. If the process is not terminated, the process returns to step S1.

  In addition, although the map display apparatus which concerns on 1st Embodiment demonstrated the example which produces and displays the map 10 'for branch direction confirmation containing all the area names or the point names described in the direction guidance signboard, For example, when the area name or the point name of the direction information stored in the direction guide signboard information storage unit 2 is hierarchized, only the preset area name or the point name is displayed in the direction information. You may let them. For example, the first level of the area name or point name in the direction information is set to the prefecture name, the second level is the prefectural office name, the main city name, the main terminal station, etc., and the third level is the local main city name, town name, etc. It is assumed that it is stored in the direction guide signboard information storage unit 2. In this case, if you have selected to display the direction information included in the second hierarchy in advance according to the driver's setting operation, etc., the area name or point name to be displayed when the vehicle approaches the direction signboard will be displayed. It can be limited to location name, major city name, major terminal station, etc.

  As described above in detail, according to the map display device according to the first embodiment to which the present invention is applied, the map on which the vehicle is moving based on the current position information acquired by the current position acquisition unit 1 is displayed as map information. When the specified road is identified from the map information stored in the storage unit 3 and travels in the direction of travel determined by the direction name signboard approach determination unit 4, the direction place name position acquisition unit 5 determines the branch destination of the road. The area name or point name of the area is acquired from the direction guidance signboard information storage unit 2 and the position of the area name or point name is acquired from the map information storage unit 3, and the current position and the branch destination direction are displayed by the display unit 6. Since the branch direction confirmation map 10 ′ in which the area name 13 shown is superimposed on the position of the area name 13 is created and displayed, the map is displayed on the direction guide signboard 20 without causing the occupant to perform operations such as changing the scale or scrolling. Approximate direction and distance of the branch destination area that has been able to be recognized by the simple and intuitive driver a. As a result, even when the vehicle is traveling, it is possible to select an optimal branch destination for heading to the destination.

  Further, according to the map display device according to the first embodiment to which the present invention is applied, the area name signboard approach determining unit 4 displays the area name 13 indicating the direction of the branch destination based on the current position and the traveling direction of the vehicle. When a predetermined condition that needs to be determined is determined and the predetermined condition is satisfied, the branch direction confirmation map 10 'is displayed, so that if the driver needs to select a branch destination, the current position of the vehicle On the other hand, the general direction and distance of the branch destination area described in the direction guide signboard 20 can be grasped.

  Further, according to the map display device to which the present invention is applied, when the distance from the vehicle to the branch point approaches a predetermined distance, the predetermined condition that the area name 13 indicating the direction of the branch destination needs to be displayed is satisfied. The branch direction confirmation map 10 'is displayed and the branch destination described on the direction guide sign 20 with respect to the current position of the vehicle at the optimal timing when the vehicle approaches the branch point and selects the branch destination. The general direction and distance of the area can be grasped.

  Furthermore, according to the map display device to which the present invention is applied, as a predetermined condition that the area name 13 indicating the direction of the branch destination needs to be displayed, it is set that the direction guide sign 20 can be seen from the vehicle. Then, since the branch direction confirmation map 10 ′ in which the spot name or area name described in the direction guidance signboard 20 is superimposed on the position including the spot name or area name is displayed, the driver displays the direction guidance signboard 20. When recognizing the existence of the lane, the general direction and distance of the branch destination area can be grasped on the display screen of the display unit 6.

  Furthermore, according to the map display device to which the present invention is applied, the direction information stored in the direction guidance signboard information storage unit 2 is stored by dividing the region name or the point name into a plurality of hierarchies, and is set in advance. Since the branch direction confirmation map 10 ′ in which the region name or the point name corresponding to the hierarchy of the direction information is superimposed on the position of the region name or the point name is displayed, the map is displayed when the vehicle approaches the direction guide signboard. An area name or a point name can be set according to the driver's preference, and the general direction and distance of the branch destination area where the direction guide sign 20 is installed can be grasped.

[Second Embodiment]
Next, a map display device according to the second embodiment will be described. In addition, about the part similar to the above-mentioned 1st Embodiment, the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The map display device according to the second embodiment automatically changes or fixes the scale of the branch direction confirmation map 10 ′ when the display is switched from the map 10 not including the area name 13 to the branch direction confirmation map 10 ′. Thus, the area name or the point name described on the direction guide signboard 20 is presented to the driver.

  As shown in FIG. 6, the map display device according to the second embodiment displays the current position of the vehicle when displaying the point or area (area name 13) indicated by the place name indicated in the direction guide signboard. The automatic scale change part 21 for switching a scale automatically so that the vehicle 11 which shows this, and all the area names 13 may enter is characterized by the above-mentioned. As a result, the scale of the map 10 displayed before the vehicle approaches the direction guidance signboard is automatically changed to a scale that includes all of the area names 13 indicated by the direction guidance signboard, and the branch direction confirmation map 10 ′. , And a branch direction confirmation map 10 ′ including the area name 13 existing at a position far from the current position can be displayed.

  The automatic scale changing unit 21 is connected to the area name position acquisition unit 5 and the display unit 6 and includes the current position of the vehicle and the area name 13 indicating all the point names or area names written on the direction guide signboard. Thus, the scale of the branch direction confirmation map 10 ′ is automatically switched. The automatic scale change unit 21 acquires the center position of the point name or area name described in the direction guide signboard from the direction place name position acquisition unit 5, acquires the current position information of the vehicle from the current location acquisition unit 1, and The scale of the branch direction confirmation map 10 ′ is calculated so that all the center positions of the point names or the area names and the current position of the vehicle are included.

  The display unit 6 is supplied from the automatic scale changing unit 21 with the scale of the branch direction confirmation map 10 ′, the current position information of the vehicle, and the center position of the area indicated by the place name indicated on the direction guide signboard, The map information of the scale obtained by the automatic scale changing unit 21 is acquired from the map information storage unit 3, and the vehicle 11 and the region name 13 are superimposed to display the branch direction confirmation map 10 ′.

  As shown in FIG. 7, the map display device according to the second embodiment determines that the vehicle has approached the direction guide signboard in step S2 by the direction name signboard approach determination unit 4 and acquires the position name position in step S4. In step S11 after the center position of the spot name or area name written on the direction guide signboard is obtained by the section 5, the automatic scale changing section 21 causes the current position information of the vehicle and the center of the spot name or area name to be displayed. From the position, the scale of the map 10 ′ for branching direction confirmation that includes the current position of the vehicle and the center position of the point name or area name to be displayed is set.

  According to such a map display device according to the second embodiment, when the map 10 including the vehicle 11 as shown in FIG. 8A is displayed at a relatively narrow scale, FIG. ) On the map 10 corresponding to the point name or the area name displayed as the vehicle 11 and the direction guide sign display 12 as shown in FIG. The scale can include a region name 13. As a result, Harajuku, Kamakura, Choshi, and Kawasaki are displayed on the direction signboard 20, but only the Choshi and Kamakura that are close to the vehicle 11 can be displayed as the region name 13 on the scale of the map 10 in FIG. By changing the scale so that all the area names 13 are included by the automatic scale changing unit 21, as shown in FIG. 8C, the branch direction confirmation map 10 ′ including the area names 13 such as Kawasaki and Harajuku is shown. Can be displayed.

  Further, the map display device displays the branch direction confirmation map 10 ′ including all the area names 13 described in the direction guide signboard 20. The scale of the branch direction confirmation map 10 ′ may be set so that only the region name 13 of the part is displayed.

  For example, the automatic scale changing unit 21 causes the vehicle to travel according to driving operation (steering angle change, turn signal, etc.) and route guidance to the destination in order to change the front lane at the branch point where the direction guide sign 20 is installed. In some cases, the vehicle traveling direction (right turn, left turn, straight travel) can be predicted. In this case, the automatic scale changing unit 21 predicts the traveling direction based on the driving operation or route guidance of the vehicle, and selects the area name 13 to be displayed on the branch direction confirmation map 10 ′ according to the prediction and sets the scale. can do. As a result, the region name 13 in the direction unrelated to the direction in which the vehicle is traveling is displayed, the branching direction confirmation map 10 ′ is displayed in a wide area, the geographical information is increased, and the position of the region name 13 on the map is displayed. It can avoid becoming difficult to recognize.

  Further, the automatic scale changing unit 21 selects only the spot name or area name closest to the current position of the vehicle for each direction of the spot name or area name written on the direction guide signboard 20, and the spot name or area name. The map 10 ′ for branching direction confirmation may be displayed at a scale that can be displayed. As shown in FIG. 8D, for example, when Kawasaki and Choshi are written in the straight direction of the direction signboard 20, the region name 13 of Choshi closest to “Oppama”, which is the current position of the vehicle. It is set as the map 10 'for branch direction confirmation of the reduced scale which can display. In addition, regarding the direction guide sign display 12, only Isogo and Kamakura that are closest to the current position of the vehicle are displayed. As a result, the map scale is displayed in a wide area because distant directions that are not so much related to the judgment at the branch point where the vehicle is currently traveling are displayed, and the geographical information increases due to the wide area display. It can be avoided that the position of 13 becomes difficult to confirm.

  Furthermore, when the location name position acquisition unit 5 supplies the point or area center pointed to by the direction guidance signboard 20, the automatic scale change unit 21 determines the area name or the center position of the point name and the current position of the vehicle. The area name 13 to be displayed on the branch direction confirmation map 10 ′ may be selected based on the distance. For example, depending on the driver, the distance and range of driving in a day are determined to some extent, so the driver does not go far from the current position of the vehicle to the center position of the area name or point name written on the direction guide signboard 20. There are cases like this. For this case, the automatic scale changing unit 21 does not display the center position of the area name or the point name far from the current position as the area name 13 but only the area name or the point name relatively close to the current position. May be displayed.

  For example, each time the vehicle travels, the automatic scale changing unit 21 accumulates and stores the travel distance to create a travel history, and specifies the maximum distance in the travel history as a range in which the driver travels in one day. Keep it. Then, the automatic scale change unit 21 determines the distance from the center position of the area name or the spot name to the current position of the vehicle when the center position of the area name or the spot name is supplied from the area name position acquisition unit 5. To do. As a result, if the distance from the center position of the area name or point name to be displayed to the current position of the vehicle is longer than a predetermined distance (maximum distance in the travel history), the center position of the area name or point name is Without displaying as the area name 13, the area name or the point name within a predetermined distance from the current position of the vehicle is selected as the area name 13 and the scale to be displayed is set to create the branch direction confirmation map 10 ′. Thereby, when the possibility that the vehicle travels from the travel history of the vehicle to the area name or the spot name described in the direction guide signboard 20 is low, the display of the area name or the spot name as the area name 13 is avoided. Thus, it is possible to avoid the fact that the location of the region name 13 becomes difficult to confirm by increasing the geographical information without making the scale of the branching direction confirmation map 10 ′ too large to display the region.

  Furthermore, the map display device stores the scale of the map 10 currently displayed on the display unit 6 as shown in FIG. 9 in place of the automatic scale changing unit 21, and from the area name position acquisition unit 5. A scale for creating a branching direction confirmation map 10 ′ including only the area name 13 that can be displayed at the scale of the current map 10 when the center position of the area name or the point name described in the direction signboard 20 is supplied. The fixing part 31 may be provided. As a result, the map display device stores the scale of the map 10 shown in FIG. 8A in the scale fixing unit 31, and when it is time to display the branch direction confirmation map 10 ′, FIG. As shown in FIG. 8E, the branch direction confirmation map 10 ′ including the area name 13 can be displayed without changing the scale from the map 10 of FIG. Even if the map fixing unit 31 does not include the area name 13 and switches to the branch direction confirmation map 10 ′, the scale is changed without changing the scale to display the area name 13. The region name 13 can be presented without making the driver aware of

  Further, as shown in FIG. 8 (d), the scale fixing unit 31 displays the area name 13 that cannot be displayed at the scale of FIG. 8 (a), the margin display area 15 for the branch direction confirmation map 10 ′ including the area name 13. You may make it display on. This causes the driver to display the area name that cannot display the area name 13 at the current scale in the margin display area 15, and the area name or the point name described in the direction guide signboard 20 is displayed on the branch direction confirmation map 10 ′. It can be shown that it is out of range. In addition, the scale fixing unit 31 displays, in the margin display area 15, an area name or a spot name that cannot be displayed in the branch direction confirmation map 10 'in a direction position relative to the current position of the vehicle of the area name or the spot name. Thus, the direction of the area name that cannot be displayed in the branch direction confirmation map 10 ′ can be recognized by the driver.

  As described above in detail, according to the map display device to which the present invention is applied, the current position and branch are determined from the scale of the map displaying the map 10 around the vehicle that does not include the branch destination area name or point name. Since the point name or the area name indicating the part or all of the previous direction is changed to a scale that can be displayed at the position of the area name or the name of the area, the branch direction confirmation map 10 ′ is displayed. The area name 13 can be confirmed by changing the scale of the branch direction confirmation map 10 ′ as required to display 13. As a result, the branch direction confirmation map 10 ′ including all the region names 13 is displayed, or the branch direction confirmation map 10 ′ not including the branch destination region name 13 that the vehicle driver does not go is displayed. be able to.

[Third Embodiment]
Next, a map display device according to a third embodiment will be described. Note that parts similar to those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 10, the map display device according to the third embodiment displays the area name for displaying the branching direction confirmation map 10 ′ including the route to the area name or the point name described in the direction guide signboard. The arrival route setting unit 41 is provided.

  The area name arrival route setting unit 41 is supplied from the area name position acquisition unit 5 with the center position of the area name or point name described in the direction guide signboard, and when the current position of the vehicle is supplied, from the current position of the vehicle The arrival route to the center position of the area name or point name described on the direction guide signboard is calculated using the Dijkstra method. This arrival route information is supplied to the display unit 6 as a number for identifying a plurality of continuous road link information stored in the map information storage unit 3.

  The display unit 6 displays the current position of the vehicle when the location name position acquisition unit 5 supplies the center position of the area name or the point name described in the direction guide signboard and the route name arrival route setting unit 41. A branching direction confirmation map 10 ′ including a reaching route from the vehicle 11 to the area name 13 is displayed.

  As shown in FIG. 11, the map display apparatus according to the third embodiment determines that the direction name signboard approached the vehicle by the direction name signboard approach determining unit 4 in step S2, and in step S4 the direction name name position. In step S21 after the acquisition unit 5 acquires the center position of the area name indicated on the direction guide signboard, the area name arrival route setting unit 41 reaches from the current position information of the vehicle to the center position of the area to be displayed. Calculate and set the route. The display unit 6 displays the vehicle 11 indicating the current position of the vehicle, the region name 13 indicating the center position of the region name or the point name described on the direction guide signboard, and the arrival route from the vehicle 11 to the region name 13. The branching direction confirmation map 10 'is displayed.

  According to such a map display device according to the third embodiment, when the map 10 including the vehicle 11 as shown in FIG. 12A is displayed, the direction guidance as shown in FIG. When approaching the signboard 20, as shown in FIG. 12C, the branch direction confirmation map 10 ′ including the vehicle 11, the area name 13, and the arrival route 17 to the area name 13 can be displayed.

  According to the map display device according to the third embodiment, the current position of the vehicle and the center position of the area name or the spot name are displayed on the branch direction confirmation map 10 ′, and further up to the center position of the area name or the spot name. Since the destination route 17 is displayed, the operation for displaying the destination route can be made unnecessary after confirming the area name 13 described on the direction guide signboard.

  Although the Dijkstra method is used in the direction place name arrival route setting unit 41 to obtain the arrival route, it is written on the direction guidance signboard when the vehicle travels from the approaching branch point to each branch destination. It is also possible to calculate an arrival route until a predetermined distance is approached to the center position of the area name or point name. As a result, the arrival route 17 can be displayed with a simpler calculation than when the arrival route is calculated by the Dijkstra method.

  In addition, the map display device previously stores in the direction guidance signboard information storage unit 2 as direction guidance signboard information for each number of the direction guidance signage from the branch point where the direction guidance signage is installed to the center position of the point name or area name. The arrival route 17 may be stored. The information on the arrival route 17 is expressed by road link information that connects the road node at the branch point to the center position of the point name or the area name. In this case, the direction place name arrival route setting unit 41 obtains, from the direction place name position acquisition unit 5, a number for identifying the direction guide sign together with the center position of the area name or the spot name described on the direction guide sign that the vehicle is approaching. Read and the arrival route 17 corresponding to the number for identifying the direction guidance signboard is read from the direction guidance signboard information storage unit 2. The display unit 6 can display the branch direction confirmation map 10 ′ including the area name 13 and the arrival route 17. Thereby, it is not necessary to calculate the arrival route by the area name arrival route setting unit 41, and the processing load can be reduced.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a block diagram which shows the structure of the map display apparatus which concerns on 1st Embodiment to which this invention is applied. It is a figure explaining the information contained in direction guidance signboard information. It is a figure explaining the advancing direction information contained in direction guidance signboard information. It is a figure explaining the map for a branch direction confirmation displayed with the map display apparatus which concerns on 1st Embodiment to which this invention is applied, (a) is a normal map which does not include an area name, (b) is installed in a branch point (C) is a branching direction confirmation map including the area name described in the direction guidance signboard, (d) is a display example in which the same scale as (a) is arranged on the branching direction confirmation map, ( e) is an example in which a branch direction confirmation map is displayed in three dimensions. It is a flowchart which shows the process sequence which displays the map for a branch direction confirmation by the map display apparatus which concerns on 1st Embodiment to which this invention is applied. It is a block diagram which shows the structure of the map display apparatus which concerns on 2nd Embodiment to which this invention is applied. It is a flowchart which shows the process sequence which displays the map for a branch direction confirmation by the map display apparatus which concerns on 2nd Embodiment to which this invention is applied. It is a figure explaining the map for a branch direction confirmation displayed with the map display apparatus which concerns on 2nd Embodiment to which this invention is applied, (a) is a normal map which does not include an area name, (b) is installed in a branch point (C) is a branch direction confirmation map with an enlarged scale, (d) is a branch direction confirmation map with the same scale as (a), and (e) is the same scale as (a). This is an example in which an area name not displayed in the branch direction confirmation map is displayed outside the branch direction confirmation map. It is a block diagram which shows the other structure of the map display apparatus which concerns on 2nd Embodiment to which this invention is applied. It is a block diagram which shows the structure of the map display apparatus which concerns on 3rd Embodiment to which this invention is applied. It is a flowchart which shows the process sequence which displays the map for a branch direction confirmation by the map display apparatus which concerns on 3rd Embodiment to which this invention is applied. It is a figure explaining the map for a branch direction confirmation displayed with the map display apparatus which concerns on 3rd Embodiment to which this invention is applied, (a) is a normal map which does not include an area name, (b) is installed in a branch point (C) is a branch direction confirmation map including an arrival route.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Present location acquisition part 2 Direction guidance signboard information storage part 3 Map information storage part 4 Direction name name sign approach judgment part 5 Direction name name acquisition part 6 Display part 21 Automatic scale change part 31 Scale fixing part 41 Area name arrival route setting part

Claims (14)

Map information storage means for storing map information including road information indicating a road on which the moving body moves;
A direction information storage means for storing the road information in association with the area information indicating the name of the area or point of the branch destination where the road branches;
Current position acquisition means for acquiring current position information of the mobile body;
A traveling direction determining means for determining a traveling direction of the moving body;
Based on the current position information acquired by the current position acquisition means, the road on which the moving body is moving is identified from the map information stored in the map information storage means, and the identified road is determined by the traveling direction determination means. When traveling in the determined traveling direction, the area name or point name of the direction of the road branch destination is acquired from the direction information storage means and the position of the area name or point name is acquired from the map information storage means And a map creation means for creating a branch direction confirmation map in which the location name or the location name indicating the current location and the direction of the branch destination is superimposed on the location of the location name or location name,
A map display device comprising: display means for displaying a map created by the map creating means. The map creating means determines a predetermined condition that needs to display an area name or a spot name indicating the direction of the branch destination based on the current position and the traveling direction of the moving object, and satisfies the predetermined condition The area name or point name of the branch destination is acquired from the direction information storage means and the position of the area name or point name is acquired from the map information storage means, and the current position and the direction of the branch destination are obtained. Create a branch direction confirmation map in which the point name or area name to be shown is superimposed on the position of the area name or point name,
The map display device according to claim 1, wherein the display means displays a branch direction confirmation map created by the map creating means.   The map display device according to claim 2, wherein the map creating unit determines that the predetermined condition is satisfied when a distance from the moving body to the branch point approaches a predetermined distance. The area name or point name of the direction information stored in the direction information storage means is the area name or point name displayed on the direction guide sign installed at the branch point of the road,
The map creating means travels on the road on which the moving body is moving in the traveling direction determined by the traveling direction determining means, and the position of the moving body is a position at which the direction guide sign can be visually recognized from the passenger of the moving body. If the predetermined condition is determined and the predetermined condition is satisfied, the area name or the point name displayed on the direction signboard is acquired from the direction information storage means and the area name or the point name A location is acquired from the map information storage means, and a branch direction confirmation map is created by superimposing a location name or a location name indicating the current location and the direction of the branch destination on the location name or location of the location name,
The map display device according to claim 1, wherein the display means displays a branch direction confirmation map created by the map creating means.   The map creating means includes a point name indicating the current position and a part or all of the branch destination from a scale of a map displaying a map around a moving object that does not include a branch destination area name or point name. Or changing the area name to a scale that can be displayed at the position of the area name or point name, and creating the branch direction confirmation map. The map display device described in 1.   The map creation means predicts a traveling direction at a branch point of the moving object, and a branch direction confirmation map in which a point name or a region name existing in the predicted traveling direction is superimposed on the position of the region name or the point name The map display device according to any one of claims 1 to 5, wherein the map display device is created.   The map creation means calculates the distance to the location of the branch destination area name or spot name of the mobile object, and determines the location name or spot name closest to the mobile object for each branch destination. The map display device according to any one of claims 1 to 5, wherein a map for branching direction confirmation superimposed on the map is created.   The map creation means calculates the average travel distance based on the travel history of the mobile body, and when the distance to the location of the area name or point name indicating the direction of the branch destination is within the average travel distance, The map display device according to any one of claims 1 to 5, wherein a map for branching direction confirmation is created by superimposing the region name or the point name on the position of the region name or the point name. . Further comprising route setting means for setting a moving route from the current position of the moving body to the destination in response to the setting of the destination of the moving body;
The map creating means predicts the traveling direction at the branch point of the moving body based on the travel route set by the route setting means, and the location name or region name existing in the predicted traveling direction is the region name. The map display device according to any one of claims 1 to 5, wherein a map for confirming a branching direction superimposed on a position of a spot name is created.   The map creating means obtains a route from the current position of the moving object to the position of the point name or area name indicating the direction of the branch destination, and the point name or area name indicating the direction of the branch destination is the name of the area or 5. The branching direction confirmation map including a route from the current position of the moving object to the area name or the position of the spot name is superimposed on the position of the spot name. The map display device according to one item.   When the map creation means displays the branch direction confirmation map from a map that displays a map around a moving object that does not include the branch destination area name or point name, the branch destination area name or point A branch that is the same scale as a map that displays a map around a moving object that does not include a name, and that has a branch destination area name or point name superimposed on the position of the area name or point name within the scope of the scale 5. A direction confirmation map is created, and an area name or a spot name not included in the branch direction confirmation map is displayed outside the branch direction confirmation map. A map display device according to claim 1. The direction information stored in the direction information storage means stores a region name or a point name divided into a plurality of levels,
The map creation means creates a branch direction confirmation map in which an area name or a spot name corresponding to a preset hierarchy of direction information is superimposed on a position of the area name or the spot name. The map display device according to any one of claims 1 to 11. When the moving body is moving, obtain the current position information of the moving body and determine the traveling direction of the moving body,
Identifying the road on which the moving body is moving based on the acquired current position information from map information including road information indicating the road on which the moving body moves;
When the specified road is traveled in the determined traveling direction, the area name or spot name in the direction of the branch destination of the road is acquired and the position of the area name or spot name is acquired from the map information,
A map display method comprising: creating and displaying a branch direction confirmation map in which a point name or a region name indicating the current position and the direction of the branch destination is superimposed on a position of the region name or the point name. A function of acquiring current position information of the moving body and determining a traveling direction of the moving body when the moving body is moving;
A function for identifying a road on which a moving body is moving based on the acquired current position information from map information including road information indicating a road on which the moving body is moved;
When the specified road is traveled in the determined traveling direction, the area name or the point name of the direction of the branch destination of the road is acquired from the direction information storage means and the position of the area name or the point name is the map The ability to get from information,
A map display program that causes a computer to implement a function for creating a branch direction confirmation map in which the location name or area name indicating the current location and the direction of the branch destination is superimposed on the location name or location of the location name.