JP2011058960A - Method for poi positioning, method for poi information processing, and navigation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for POI positioning and a method for POI information processing which enable heightening of the possibility of determining the relative position of a POI based on a road and displaying of a POI icon to the road at a position on the appropriate side in the width direction of the road and to provide a navigation system. <P>SOLUTION: Even in the case that POI information does not contain POI relative position information, the relative position of a POI based on the road corresponding to a POI-corresponding link is determined on the basis of the relative position of such a polygon having a name matching with a POI corresponding to the POI information based on the POI-corresponding link. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a POI position determination method, a POI information processing method, and a navigation apparatus, and more particularly to a POI position determination method, a POI information processing method, and a navigation apparatus suitable for displaying a POI icon.

  Conventionally, in navigation devices, when a vehicle is guided along a guidance route to a destination, when the host vehicle reaches an intersection on the guidance route, an enlarged view of the intersection showing the vicinity of the intersection is displayed on the display unit. By displaying the information, the direction in which the vehicle should travel has been guided.

  The enlarged view of the intersection includes backgrounds such as roads ahead of the vehicle including the roads on the guidance route, names of buildings, sites, and features. Further, in the navigation device, an icon indicating a POI (Points Of Interest) such as a facility (hereinafter referred to as a POI icon) can be superimposed and displayed on such an enlarged view of the intersection.

  Here, POI information stored in the POI database is used to display the POI icon. In this POI information, information on predetermined attributes of the POI (for example, coordinates such as name, type and longitude and latitude), information specifying the appearance (shape, pattern and color) of the POI icon and the POI are associated (linked) ) Included information on links in the map information. Furthermore, the POI information is based on the road indicating which side in the width direction (left and right) the POI exists with respect to the road corresponding to the link in the map information associated with the POI. Information on the relative position of the POI (hereinafter referred to as POI relative position information) was included.

  Then, the navigation apparatus uses the POI relative position information included in the POI information to display the POI icon indicating the POI existing along the road (facing the road) in the width direction with respect to the road on the enlarged intersection view. It was possible to superimpose and display at an appropriate side position.

  For example, in the intersection enlarged view 1 of FIG. 8, a POI icon 3 indicating a destination as a POI is superimposed on the left side in FIG. 8 with respect to the road (one-lane road) 2 ahead of the host vehicle. . Such a display state of the POI icon 3 indicates that the POI relative position information included in the POI information corresponding to the destination is the destination corresponding to the road 2 corresponding to the link associated with the destination. This is because it is information indicating that it is present at the position on the left side in the direction of travel.

JP 2006-266840 A JP 2003-156345 A

  However, there are cases where POI information does not necessarily include POI relative position information. When the POI relative position information is not included in the POI information, even if the navigation device refers to the information on the POI coordinates in the POI information, the POI is in any width direction with respect to the road. It was not possible to accurately determine whether it was in the side position.

  In such a case, the navigation apparatus had to display the POI icon 3 in the center of the road 2 on the enlarged intersection view 1 as shown in FIG. However, when the POI icon 3 as shown in FIG. 9 is displayed, it is not possible for the user to grasp an appropriate driving method for heading to the POI, and the visibility of the road is impaired. It was.

  Therefore, the present invention has been made in view of the above points, and can increase the probability that the relative position of the POI with reference to the road can be determined. It is an object of the present invention to provide a POI position determination method, a POI information processing method, and a navigation device that can be displayed at an appropriate position in the width direction.

  In order to achieve the above-described object, a POI position determination method according to the present invention is a POI position determination method for determining a POI position with reference to a road, and is a predetermined POI stored in a first storage means. The POI information including information related to the attributes of the road does not include information related to the relative position of the POI with respect to the road indicating the position of the POI in the width direction with respect to the road. In this case, the map information includes link information and polygon information stored in the second storage means, and a map in which the POI corresponding to the POI information is associated with the link corresponding to the link information. From the information, the polygon corresponding to the polygon arranged at the side position orthogonal to the link length direction with respect to the POI correspondence link associated with the POI. When the specific polygon information including the name of the polygon is searched and the specific polygon information is detected, the name of the polygon included in the detected specific polygon information and , The POI name included in the POI information is compared, and if the result of this comparison is that the polygon name and the POI name match, the relative of the polygon to the POI corresponding link The relative position with respect to the corresponding road corresponding to the POI corresponding link corresponding to a different position is determined as the relative position of the POI with respect to the corresponding road.

  According to such a method, even if the POI information does not include information on the relative position of the POI with reference to the road, the polygon whose name matches the POI corresponding to the POI information. Since the relative position of the POI with reference to the corresponding road corresponding to the POI-compatible link can be determined based on the relative position of the POI-compatible link, the relative position of the POI with respect to the road is determined. Can increase the probability of being able to.

  The POI information processing method according to the present invention is a POI information processing method for processing POI information including information related to a predetermined attribute of the POI, and the POI determined by the POI position determination method described above. Is recorded in the first storage means as information related to the relative position of the POI with respect to the corresponding road, thereby processing the POI information.

  According to such a method, even if the POI information does not include information on the relative position of the POI with reference to the road, the relative position of the POI with respect to the road is determined and determined. By processing the POI information by recording the relative position of the POI as information on the relative position of the POI with reference to the corresponding road, the road is used when the POI information after processing is used on the navigation device side. The probability that the relative position of the reference POI can be determined can be increased.

  Furthermore, the navigation device according to the present invention is a first storage means storing POI information including information related to a predetermined attribute of POI, map information including link information and polygon information, and corresponds to the POI information. A second storage unit storing map information in which a POI to be associated with a link corresponding to the link information is stored, and a predetermined image indicating a predetermined area ahead of the traveling direction of the own vehicle on the display unit Based on the POI information stored in the first storage means and the image display means to display, the POI icon indicating the POI existing in the predetermined area corresponds to the POI on the predetermined image. A POI icon display means for superimposing and displaying at a position where the POI icon is displayed. For the target display target POI, the POI information stored in the first storage means corresponding to the display target POI indicates that the display target POI is located on either side of the road in the width direction. Relative position information presence / absence determining means for determining whether or not information on the relative position of the display target POI with respect to the road indicating whether or not it exists is included, and the relative position information presence / absence in the display target POI For the relative position information lack POI for which the judgment result of the judgment means is negative, from the map information stored in the second storage means, to the POI correspondence link associated with the relative position information lack POI Specific polygon information corresponding to a polygon placed at a position perpendicular to the link length direction, including the name of the polygon Polygon information search means for searching for polygon information, and when the specific polygon information is detected by the polygon information search means, the name of the polygon contained in the detected specific polygon information, and the relative Whether or not the name of the polygon matches the name of the POI lacking relative position information by comparing the name of the POI lacking relative position information included in the POI information corresponding to the POI lacking position information Corresponding to the relative position of the polygon with respect to the POI-corresponding link with respect to the POI for which the determination result of the name coincidence determining means of the POI-corresponding link is positive. The relative position with respect to the corresponding road corresponding to the POI compatible link is based on the corresponding road. Relative position determining means for determining the relative position of the relevant POI, and a POI icon indicating the relevant POI with respect to the relevant road on the predetermined image of the relevant POI determined by the relative position determining means. A POI icon indicating a relative position information containing POI that is displayed at a position on the relative position side and in which the determination result of the relative position information presence / absence determination means in the display target POI is affirmative is displayed on the predetermined image. Display processing means for displaying the road corresponding to the POI-corresponding link associated with the relative position information-containing POI at a position on the relative position side indicated in the information on the relative position of the relative position information-containing POI. It is characterized by that.

  According to such a configuration, even if the POI information does not include information on the relative position of the POI with reference to the road, the relative position determination means determines the POI included in the POI information. Since the relative position of the POI with respect to the POI-compatible link can be determined based on the relative position of the polygon with the same name with respect to the POI-compatible link, the road is used as the reference. The probability that the relative position of the POI can be determined can be increased. Further, when the relative position of the POI is determined by the relative position determination means, the display processing means determines the relative position of the determined POI with respect to the corresponding road on the predetermined image displayed by the image display means. Since the POI icon can be displayed in a superimposed manner, the POI icon can be displayed at an appropriate position in the width direction with respect to the road.

  Furthermore, the predetermined image may be an enlarged view of an intersection.

  According to such a configuration, when the POI icon is superimposed on the enlarged intersection map, the POI icon is displayed at an appropriate position in the width direction with respect to the road on the enlarged intersection map. Can do.

  The display target POI may include at least one of a destination and a waypoint.

  According to such a configuration, the POI icon indicating the destination or waypoint can be displayed at an appropriate position in the width direction with respect to the road.

  Furthermore, a relative position information recording means for recording the relative position of the POI determined by the relative position determination means in the first storage means as information relating to the relative position of the POI with reference to the road. You may prepare.

  According to such a configuration, the relative position of the relevant POI determined by the relative position determining means can be recorded as information relating to the relative position of the relevant POI by the relative position information recording means. This determination result can be reused, and convenience can be improved.

  According to the present invention, it is possible to increase the probability that the relative position of the POI with reference to the road can be determined. As a result, the POI icon is displayed at an appropriate position in the width direction with respect to the road. Can do.

FIG. 4 is a schematic diagram showing an outline of data used for determining the relative position of POI in the embodiment of the POI position determining method according to the present invention. The flowchart which shows embodiment of the POI position determination method based on this invention The flowchart which shows embodiment of the processing method of POI information based on this invention The block diagram which shows embodiment of the navigation apparatus which concerns on this invention The block diagram which shows the concrete structure of navigation CPU in embodiment of the navigation apparatus which concerns on this invention. The conceptual diagram which shows the determination operation | movement of the relative position of POI in embodiment of the navigation apparatus which concerns on this invention. The flowchart which shows embodiment of the navigation apparatus which concerns on this invention Schematic diagram showing the superimposed display state of POI icons on the enlarged intersection Schematic diagram showing conventional problems

(Embodiment of POI position determination method)
Hereinafter, an embodiment of a POI position determination method according to the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 shows data used in the POI position determination method in this embodiment. As shown in FIG. 1, in the present embodiment, a POI database (POIDB) and a map database (map DB) stored in a storage device 4 serving as a first storage unit and a second storage unit are used.

  As shown in FIG. 1, the POI database stores POI information including information on predetermined attributes of POI such as facilities for each of a plurality of POIs. As shown in FIG. 1, the POI information for each POI includes POI name information indicating the POI name, POI type information indicating the POI type, POI coordinate information indicating the POI coordinates (longitude, latitude, etc.), etc. Information on the POI attribute is included. The POI information for each POI includes POI icon information that specifies the appearance (shape, pattern, color, etc.) of the POI icon. Further, the POI information for each POI includes POI-compatible link identification information indicating a link (hereinafter referred to as a POI-compatible link) in a map database associated (linked) to the POI. This POI-compatible link identification information may be a link ID of a POI-compatible link. Furthermore, the POI information for each POI includes information (hereinafter referred to as POI relative position information) regarding the relative position of the POI with reference to the road corresponding to the POI-compatible link (hereinafter referred to as the corresponding road). There may be. However, the relative position of the POI with respect to the corresponding road is the relative position of the POI with respect to the corresponding road in the width direction. Therefore, the POI relative position information is information indicating on which side of the road the POI is located in the width direction with respect to the road. More specifically, the POI relative position information indicates that when the POI travels on the road from the start end (start end node) side to the end (end node) side of the POI compatible link, It may be information indicating whether it exists on the left or right side in the traveling direction. Various kinds of information included in the POI information shown in FIG. 1 is given identification information (not shown) that is common or corresponding to each other and indicates that the information is related to the same POI.

  On the other hand, as shown in FIG. 1, map information is stored in the map database. The map information includes various information such as road information and background information. Of these, the road information is used for drawing a road on a map, detecting the position of the vehicle, guiding a route, and the like. As shown in FIG. 1, the road information includes link information for each of a plurality of links. This link information includes link ID, link length, start link (start node) coordinates, end link (end node) coordinates, link shape (shape interpolation point coordinates), and although not shown, It consists of various information such as regulation information, width / lane information, and road names. Furthermore, although not shown, the road information includes node information related to the nodes in addition to the link information.

  Of the map information, the background information is used for drawing a background on a map, route guidance, and the like. As shown in FIG. 1, the background information includes polygon information for each of a plurality of polygons. This polygon information is composed of various types of information such as polygon type (park, river, building, etc.), polygon name, polygon coordinates (latitude and longitude, etc.), polygon shape and color (polygon fill color), and the like. The polygon coordinates may be the coordinates of the representative points of the polygons. In addition, the polygon shape may be defined by the coordinates of connection points between a series of a plurality of segments (lines) connected endlessly forming the outer shape of the polygon. Although not shown, the background information includes point information, polyline information, text information, and the like in addition to polygon information.

  Further, although not shown, the map information includes road network data used for route search. The road network data has nodes, links, traffic conditions, and the like as basic components.

  As shown in FIG. 1, in this embodiment, the correspondence between POI-compatible link identification information (for example, link ID) in POI information and link information (for example, link ID) in road information is taken. (For example, the POI and the link having the same link ID correspond to each other), the POI and the POI corresponding link are associated (linked) to each other.

  On the premise of such a data structure, in the present embodiment, for each POI in which POI information is stored in the POI database, the relative position of the POI with respect to the corresponding road described above by the method shown in FIG. (Hereinafter referred to as POI relative position).

  That is, in this embodiment, first, as shown in step 1 (ST1) of FIG. 2, it is determined whether or not the POI relative position information is included in the POI information. 7 (ST7), if not included, the process proceeds to step 2 (ST2).

  Here, the processing after step 2 (ST2) will be described first. First, in step 2 (ST2), specific polygon information is searched from map information stored in the map database. However, the specific polygon information is polygon information corresponding to a polygon arranged at a position perpendicular to the link length direction with respect to the POI-compatible link, and is polygon information including the name of the polygon. It is. Such a search for specific polygon information can be performed, for example, by the following method. That is, first, the POI-compatible link is extracted from the map information in association with the POI-compatible link identification information included in the POI information. Next, the shape and coordinates of the extracted POI-compatible link are compared with the polygon shape and coordinates in each polygon information included in the background information in the map information. Then, as a result of this comparison, polygon information corresponding to polygons that are considered to be arranged at positions lateral to the POI corresponding link is extracted. At this time, various conditions can be set as conditions under which the polygon is considered to be arranged at the side position of the POI-compatible link. For example, when the perpendicular line intersecting the POI-compatible link can be drawn from the coordinates of the representative point (for example, the center of gravity) of the polygon to the POI-compatible link, the polygon is arranged at a position on the side of the POI-compatible link. May be considered. Further, this condition may include that the polygon is arranged at a position within a predetermined distance on the side with respect to the POI-compatible link. Then, it is determined whether or not a polygon name is included in the polygon information extracted in this way, and if it is included, the polygon information may be detected as specific polygon information.

  Next, in step 3 (ST3), it is determined whether or not specific polygon information is detected in step 2 (ST2). If detected, the process proceeds to step 4 (ST4). Ends the process.

  Next, in step 4 (ST4), the name of the polygon included in the specific polygon information detected in step 2 (ST2) is compared with the name of the POI included in the POI information.

  Next, in step 5 (ST5), as a result of the comparison in step 4 (ST4), it is determined whether or not the polygon name matches the POI name. If they match, the process proceeds to step 6 (ST6). If they do not match, the process ends. At this time, if the POI name does not include the POI name, the process may be terminated.

  Next, in step 6 (ST6), the relative position with respect to the corresponding road corresponding to the relative position of the polygon in the specific polygon information with respect to the POI corresponding link is determined as the POI relative position with reference to the corresponding road. To finish the process. For example, if the polygon in the specific polygon information for the POI-compatible link is present on the left side from the start node side to the end node side of the POI-compatible link, “left side” is set to the corresponding road, What is necessary is just to determine with a POI relative position.

  On the other hand, when proceeding to Step 7 (ST7), the POI relative position indicated in the POI relative position information included in the POI information is determined as the POI relative position with respect to the corresponding road, and the process is terminated.

  Such a POI position determination method according to the present embodiment is a state in which the storage device 4 storing the POI database and the map database is mounted on the navigation device, and this navigation device implements the POI position determination method according to the present embodiment. It may be performed by executing a program. In this case, the POI position determination method may not be performed for all POIs at once, but only for POIs that display a POI icon on the display unit of the navigation device.

  Further, the POI position determination method in the present embodiment may be performed on the POI information in the stage before being installed in the navigation device. That is, the POI information used by the navigation device is obtained by creating the original POI information at the data producer and then processing the created POI information into a state where the navigation device can be used by the data processor. May be. Therefore, the POI position determination method in this embodiment is a program for a computer used for processing to execute the POI position determination method in a processing stage in which original POI information before processing is processed into a state where the navigation device can be used. You may be made to perform by performing.

In FIG. 1, the POI database and the map database are stored in the same storage device 4, but if the POI and the POI-compatible link are associated with each other, the two databases are different from each other. May be stored. Furthermore, POI information and map information may be stored in the same database.
(Embodiment of POI information processing method)
Next, an embodiment of the POI information processing method according to the present invention will be described with reference to FIG.

  In the present embodiment, the POI position determination method shown in FIG. 2 is performed in the original POI information processing stage described above, and the POI relative position determined by the POI position determination method performed in this processing stage is The POI information is processed by being newly added to the POI information.

  That is, as shown in FIG. 3, in this embodiment, after going through the same steps 1 (ST1) to 6 (ST6) as those shown in FIG. 2, the process proceeds to step 8 (ST8).

  In step 8 (ST8), the POI information is processed by recording (registering) the POI relative position determined in step 6 (ST6) in the POI database stored in the storage device 4 as POI relative position information. Then, the process ends.

Therefore, according to this embodiment, POI information supplemented with POI relative position information not included in the original POI information can be provided to the navigation device.
(Embodiment of navigation device)
Next, an embodiment of a navigation device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 4, the navigation device 7 in this embodiment is roughly divided into a navigation main unit 8, a GPS receiver 10 connected to the navigation main unit 8, an autonomous navigation sensor 11, an input operation unit 12, and a display. It is comprised by the display 14 and the speaker 15 as a part.

  The GPS receiver 10 receives GPS information (information on time and orbit) distributed from a GPS satellite (not shown), and outputs the received GPS information to the navigation main unit 8 side.

  The autonomous navigation sensor 11 detects the vehicle speed, acceleration (angular velocity), own vehicle direction, and the like of the host vehicle, and outputs the detection result to the navigation main unit 8 side. The autonomous navigation sensor 11 may be a vehicle speed sensor, a gyro sensor, or the like.

  The input operation unit 12 is used for various input operations on the navigation device 7. The input operation unit 12 may be a remote controller, a touch panel of the display 14, a linear encoder, a rotary encoder, or the like.

  Next, the navigation main unit 8 will be described in detail. As shown in FIG. 1, the navigation main unit 8 has a navigation CPU 17, a hard disk drive (HDD) 18, a flash memory 19, and a RAM 20 connected to the system bus 16. is doing.

  Here, the navigation CPU 17 executes various functions of the navigation device 7 such as a vehicle position calculation function, a map display function, a route search function, a route guidance function, and a search function.

  The hard disk drive 18 functions as first storage means and second storage means, and the hard disk drive 18 stores a POI database and map database similar to those shown in FIG. Also in the present embodiment, as in FIG. 1, the POI information and the POI-compatible link are associated with each other via the POI-compatible link identification information.

  Although not shown, the hard disk drive 18 stores an execution program for the navigation CPU 17.

  The flash memory 19 stores an execution program of the navigation CPU 17 that is read from the hard disk drive 18 by the navigation CPU 17 when the navigation device 7 is started. The stored execution program is stored by the navigation CPU 17. By being appropriately executed, various functions of the navigation device 7 are appropriately executed.

  Furthermore, the RAM 20 is used for temporarily storing various data such as processing results by the navigation CPU 17.

  Next, the navigation CPU 17 will be described in more detail. As shown in FIG. 5, the navigation CPU 17 has a destination setting unit 21 as one of its functional blocks. The destination setting unit 21 displays an operation screen for destination setting on the display 14 and then responds to a user input operation using the input operation unit 12 for the displayed operation screen for destination setting. The destination is set.

  Further, as shown in FIG. 5, the navigation CPU 17 has a vehicle position calculation unit 22 as one of its functional blocks, and the vehicle position calculation unit 22 is output from the GPS receiver 10. The GPS information and the detection result output from the autonomous navigation sensor 11 are input. And the own vehicle position calculation part 22 performs the satellite navigation which calculates an own vehicle position as an absolute coordinate based on the GPS information input from the GPS receiver 10 side. In addition, the vehicle position calculation unit 22 performs autonomous navigation based on the detection result input from the autonomous navigation sensor 11 side to calculate the vehicle position as a relative position that is a change from the previous positioning position. It has become. Further, the own vehicle position calculation unit 22 uses the map information (road information) in the map database stored in the hard disk drive 18 to determine the own vehicle position calculated by satellite navigation or autonomous navigation in the map information. A map matching process for correcting the position on the road to be performed is performed. When the map matching process is properly performed, the vehicle position calculation unit 22 uses the vehicle position after the map matching process as a final calculation result.

  Furthermore, as shown in FIG. 5, the navigation CPU 14 has a map drawing unit 23 as one of its functional blocks. The map drawing unit 23 displays a map indicating a predetermined area (for example, the vicinity of the vehicle position) based on the map information (road information, background information, etc.) in the map database stored in the hard disk drive 18. 14 is displayed.

  Furthermore, as shown in FIG. 5, the navigation CPU 14 has a route search unit 24 as one of its functional blocks. The route search unit 22 is configured to search for a preset route from the vehicle position calculated by the vehicle position calculation unit 22 to the destination set by the destination setting unit 21 based on the road network data in the map information. The optimum route according to the condition is searched. Then, the route search unit 22 presents the searched optimum route to the user by display on the display 14.

  Further, as shown in FIG. 5, the navigation CPU 14 has a route guidance unit 25 as one of its functional blocks. When the optimum route searched and presented by the route search unit 25 is set as a guide route by an input operation using the input operation unit 12, the route guide unit 25 starts route guidance according to the guide route. It is supposed to be. In the present embodiment, the route guidance unit 25 functions as an image display unit, and displays an enlarged view of an intersection as a predetermined image indicating a predetermined region ahead of the traveling direction of the host vehicle when the route is guided. It has become. In addition to the display of the enlarged intersection map, the route guidance may be displayed by superimposing an image of the guidance route on the map displayed on the display 14 by the map drawing unit 23, or via the speaker 15 on the right side of the intersection. This is also performed by outputting a left turn guidance voice.

  Further, as shown in FIG. 5, the navigation CPU 14 has a POI icon drawing unit 26 as POI icon display means as one of its functional blocks. This POI icon drawing unit 26 displays a POI icon indicating a POI existing in the area indicated by the enlarged intersection as a predetermined area based on the POI information in the POI database stored in the hard disk drive 18. The image is superimposed and displayed at a position corresponding to the POI on the enlarged view.

  More specifically, as shown in FIG. 5, the POI icon drawing unit 26 has a relative position information presence / absence determination unit 27 as a relative position information presence / absence determination unit as one of its functional blocks. The relative position information presence / absence determination unit 27 is a POI that is a display target of a POI icon among POIs in which POI information is stored in a POI database stored in the hard disk drive 18 (hereinafter referred to as a display target POI). Is determined whether the POI relative position information is included in the POI information in the POI database. Note that the display target POI in the present embodiment is a POI existing in the area indicated by the enlarged intersection view. However, the display target POI may be a POI that exists in the area indicated by the enlarged intersection view and satisfies the POI type condition preset by the user. The determination by the relative position information presence / absence determination unit 27 may be performed when the host vehicle reaches a guide point where an enlarged view of the intersection is to be displayed during route guidance.

  As shown in FIG. 5, the POI icon drawing unit 26 has a polygon information search unit 28 as polygon information search means as one of its functional blocks. The polygon information search unit 28 stores, in the hard disk drive 18, a POI in which the determination result of the relative position information presence / absence determination unit 27 in the display target POI is negative (hereinafter referred to as relative position information lack POI). The specific polygon information is searched from the map information in the map database. However, the specific polygon information is the polygon information corresponding to the polygon arranged at the side position orthogonal to the link length direction with respect to the POI correspondence link associated with the POI lacking relative position information, Polygon information including the name of the polygon. As a specific search method for the specific polygon information, a method similar to the specific polygon information search method in the POI position determination method described above may be used.

  Furthermore, as shown in FIG. 5, the POI icon drawing unit 26 has a name match determination unit 29 as a name match determination unit as one of its functional blocks. When the polygon information search unit 28 detects specific polygon information, the name match determination unit 29 corresponds to the name of the polygon included in the detected specific polygon information and the relative position information lack POI. The relative position information lacking POI name included in the POI information is compared. The name match determination unit 29 determines whether or not the name of the polygon included in the specific polygon information matches the name of the POI lacking relative position information by this comparison.

  Furthermore, as shown in FIG. 5, the POI icon drawing unit 26 has a relative position determining unit 31 as a relative position determining unit as one of its functional blocks. The relative position determination unit 31 uses a polygon included in specific polygon information for a POI-corresponding link for a relative position deficiency POI (hereinafter referred to as a corresponding POI) for which the determination result of the name match determination unit 29 is positive. The relative position with respect to the corresponding road corresponding to the relative position is determined as the POI relative position of the corresponding POI with reference to the corresponding road.

  Here, Step 10 (ST10) to Step 13 (ST13) in FIG. 6 show an example of such a POI relative position determination method. First, step 10 (ST10) is performed when the POI 36 in the area indicated by the enlarged intersection view is a POI lacking relative position information when the host vehicle position 34 reaches the guidance point by route guidance. In this state, it is unknown whether the POI 36 exists on the left or right side of the road 35 in front of the vehicle position 34. That is, Step 10 (ST10) shows a state where the determination result of the relative position information presence / absence determination unit 27 is negative. However, the POI information includes POI name information indicating that the name of the POI 36 is “ABC parking lot”. In FIG. 6, the POI 36 is shown as an icon for convenience. Next, step 11 (ST11) shows a search result of specific polygon information searched by the polygon information search unit 28 in response to step 10 (ST10). In step 11 (ST11), the polygon information corresponding to the polygon 37 arranged on the right side in the traveling direction of the host vehicle with respect to the POI correspondence link L associated with the POI 36 is detected as specific polygon information. Shows the state. The specific polygon information detected in step 11 (ST11) includes polygon name information indicating that the name of the polygon 37 is “ABC parking lot”. Next, step 12 (ST12) shows the determination result of whether or not the name of the POI 36 and the name of the polygon 37 determined by the name match determination unit 29 in response to step 11 (ST11) match. In step 12 (ST12), since the name of the POI 36 and the name of the polygon 37 are both “ABC parking lot”, a positive determination result is output. Next, step 13 (ST13) shows the determination result of the relative position of the POI 36 determined by the relative position determination unit 31 in response to step 12 (ST12). In step 13 (ST13), the “right side” of the road 35 corresponding to the relative position of the polygon 37 with respect to the POI corresponding link L is determined as the relative position of the POI 36.

  Returning to FIG. 3, the POI icon drawing unit 26 has a display processing unit 32 as a display processing unit as one of its functional blocks. The display processing unit 32 displays a POI icon indicating the corresponding POI at a position on the POI relative position side of the corresponding POI determined by the relative position determining unit 31 with respect to the corresponding road on the enlarged intersection view. Yes. At this time, the display processing unit 32 displays the POI icon indicating the corresponding POI on the POI relative position side with respect to the corresponding road based on the POI coordinate information (see FIG. 1) included in the POI information corresponding to the corresponding POI. You may make it display in the position considered to be the optimal in.

  On the other hand, the display processing unit 32 displays the POI icon indicating the relative position information containing POI with respect to the road corresponding to the POI corresponding link associated with the relative position information containing POI on the enlarged intersection view. Is displayed at the position on the POI relative position side indicated by the POI relative position information. However, the relative position information containing POI is a POI in which the determination result of the relative position information presence / absence determination unit 27 in the display target POI is affirmative.

  In addition to the above configuration, the POI icon drawing unit 26 further uses the hard disk drive as the POI relative position information of the POI determined by the relative position determination unit 31 as the POI relative position information of the POI with reference to the road. 18 may have a relative position information recording unit for recording in the POI database stored in 18.

  Next, the effect | action of this embodiment is demonstrated using FIG.

  For the sake of convenience, in the initial state, it is assumed that the optimum route searched by the route search unit 24 is set in the route guide unit 25 as a guide route. At this time, it is assumed that the POI icon drawing unit 26 is set with a POI type for displaying the POI icon.

  From the initial state, first, in step 21 (ST21) of FIG. 7, the route guidance unit 25 starts route guidance according to the guidance route.

  Next, in step 22 (ST22), the relative position information presence / absence determination unit 27 determines whether or not the vehicle has reached a guidance point where an enlarged view of the intersection on the guidance route should be displayed. The process proceeds to step 23 (ST23), and if not reached, the process proceeds to step 31 (ST31).

  Here, a series of processing from step 23 (ST23) to step 30 (ST30) will be described first. First, in step 23 (ST23), the relative position information presence / absence determination unit 27 stores the data in the hard disk drive 18. POI information corresponding to the POI existing in the area indicated by the enlarged intersection view to be displayed is extracted from the existing POI database as the display target POI.

  Next, in step 24 (ST24), the relative position information presence / absence determination unit 27 determines whether or not the display target POI extracted in step 23 (ST23) includes POI relative position information. In such a case, the process proceeds to step 32 (ST32). Otherwise, the process proceeds to step 25 (ST25). Here, when the process proceeds to step 32 (ST32), it indicates that the display target POI is a relative position information containing POI, and when the process proceeds to step 25 (ST25), the display target POI is a relative position information lack POI. Indicates that there is.

  Next, in step 25 (ST25), the polygon information search unit 28 searches for specific polygon information from the map database stored in the hard disk drive 18.

  Next, in step 26 (ST26), the name match determination unit 29 determines whether or not specific polygon information is detected in step 25 (ST25). If detected, the process proceeds to step 27 (ST27). If not detected, the process proceeds to step 34 (ST34).

  Next, in step 27 (ST27), the name match determination unit 29 includes the polygon name included in the specific polygon information detected in step 25 (ST25) in the POI information corresponding to the POI lacking relative position information. Compared with the name of the POI lacking relative position information.

  Next, in step 28 (ST28), the name match determination unit 29 determines whether or not the polygon name compared in step 27 (ST27) matches the name of the POI lacking relative position information. Advances to step 29 (ST29), and if they do not match, advances to step 34 (ST34). Here, when the process proceeds to step 29 (ST29), it indicates that the POI lacking relative position information is the corresponding POI.

  Next, in step 29 (ST29), the relative position determination unit 31 selects the corresponding road corresponding to the relative position of the polygon included in the specific polygon information for the POI corresponding link associated with the POI. The relative position is determined as the POI relative position of the corresponding POI with respect to the corresponding road.

  Next, in step 30 (ST30), as shown in FIG. 8, the route guidance unit 25 displays the intersection enlarged view 1 on the display 14, and the display processing unit 32 causes the corresponding road 2 on the intersection enlarged view 1 to be displayed. On the other hand, the POI icon 3 indicating the corresponding POI is displayed at the position corresponding to the POI relative position of the corresponding POI determined in step 29 (ST29) (left side in FIG. 8), and the process is terminated.

  On the other hand, when the process proceeds from step 22 (ST22) to step 31 (ST31), the route guidance by the route guidance unit 25 is continued in step 31 (ST31) and the process returns to step 22 (ST22).

  When the process proceeds from step 24 (ST24) to step 32 (ST32), first, in step 32 (ST32), the relative position determination unit 31 includes the POI information corresponding to the relative position information containing POI. The POI relative position indicated in the POI relative position information is determined as the POI relative position of the POI-containing POI, and the process proceeds to step 33 (ST33). Next, in step 33 (ST33), the route guidance unit 25 displays the intersection enlarged view 1 on the display 14, and the display processing unit 32 applies the step 32 (ST32) to the corresponding road 2 on the intersection enlarged view 1. The POI icon 3 indicating the relative position information-containing POI is displayed at the position corresponding to the POI relative position of the relative position information-containing POI determined in step, and the process ends.

  In addition, when proceeding from step 26 (ST26) or step 28 (ST28) to step 34 (ST34), as shown in FIG. 9, the route guidance unit 25 displays the intersection enlarged view 1 on the display 14. Then, the display processing unit 32 displays the POI icon 3 at the center of the road 2 on the enlarged intersection map 1 and ends the process.

  As described above, according to the present invention, even if the POI relative position information is not included in the POI information stored in the POI database, the name matches the POI corresponding to the POI information. Since the POI relative position with respect to the corresponding road can be determined based on the relative position of the polygon with respect to the POI correspondence link, the probability that the POI relative position with respect to the corresponding road can be determined is increased. be able to. As a result, the POI icon can be displayed at an appropriate position in the width direction with respect to the road.

  In addition, this invention is not limited to embodiment mentioned above, A various change can be made as needed. For example, the present invention can be effectively applied not only to an enlarged intersection view displayed as a bird's eye view as shown in FIGS. 8 and 9 but also to an enlarged intersection view displayed as a plan view. Further, the present invention is applicable not only to the superimposed display of the POI icon on the enlarged intersection map but also to the superimposed display of the POI icon on the map displayed by the map drawing unit 23. The same effect can be achieved. Furthermore, the present invention can be applied not only to the icon indicating the destination but also to the display of icons indicating various POIs such as icons indicating the waypoints of navigation.

DESCRIPTION OF SYMBOLS 7 Navigation apparatus 14 Display 26 POI icon drawing part 27 Relative position information presence determination part 28 Polygon information search part 29 Name coincidence determination part 31 Relative position determination part 32 Display processing part

Claims (6)

A POI position determination method for determining a POI position based on a road,
The POI information including information on the predetermined attribute of the POI stored in the first storage means is based on the road indicating the position of the POI in the width direction with respect to the road. Map information including link information and polygon information stored in the second storage means when the POI relative position information is not included, the POI corresponding to the POI information and the link information Polygon information corresponding to a polygon arranged at a side position orthogonal to the link length direction with respect to the POI correspondence link associated with the POI from the map information associated with the link corresponding to the POI When the specific polygon information including the name of the polygon is searched and the specific polygon information is detected, the detected special information is detected. When the name of the polygon included in the polygon information is compared with the name of the POI included in the POI information, and as a result of the comparison, the name of the polygon matches the name of the POI Determining a relative position with respect to the corresponding road corresponding to the POI corresponding link corresponding to the relative position of the polygon with respect to the POI corresponding link as a relative position of the POI with respect to the corresponding road. A POI position determination method characterized by: A POI information processing method for processing POI information including information on predetermined attributes of a POI,
The POI information stored in the first storage means includes information related to the relative position of the POI with respect to the road indicating the position of the POI in the width direction with respect to the road. If not, map information including link information and polygon information stored in the second storage means is associated with the POI corresponding to the POI information and the link corresponding to the link information. Polygon information corresponding to a polygon arranged at a side position orthogonal to the link length direction with respect to the POI corresponding link associated with the POI, including the name of the polygon When the specific polygon information is searched and the specific polygon information is detected, the polygons included in the detected specific polygon information are searched. And the name of the POI included in the POI information are compared, and if the result of this comparison is that the name of the polygon matches the name of the POI, the polygon for the POI-corresponding link The relative position with respect to the corresponding road corresponding to the POI correspondence link corresponding to the relative position of the POI is determined as the relative position of the POI with reference to the corresponding road, and the determined relative position of the POI The POI information is processed by recording the POI information in the first storage means as information relating to the relative position of the POI with respect to the corresponding road. First storage means for storing POI information including information relating to predetermined attributes of the POI;
Second storage means for storing map information including link information and polygon information, wherein map information in which a POI corresponding to the POI information is associated with a link corresponding to the link information;
Image display means for displaying a predetermined image showing a predetermined area ahead of the traveling direction of the host vehicle on the display unit;
Based on the POI information stored in the first storage means, a POI that superimposes and displays a POI icon indicating a POI existing in the predetermined area at a position corresponding to the POI on the predetermined image. A navigation device comprising icon display means,
The POI icon display means includes
For the display target POI that is the display target of the POI icon, the POI information stored in the first storage means corresponding to the display target POI indicates whether the display target POI is in the width direction with respect to the road. Relative position information presence / absence determining means for determining whether or not the information about the relative position of the display target POI with respect to the road indicating whether or not the position is present is included;
For the relative position information lack POI in which the determination result of the relative position information presence / absence determining means in the display object POI is negative, the relative position information is obtained from the map information stored in the second storage means. Retrieval of polygon information corresponding to a polygon arranged at a position perpendicular to the link length direction with respect to the POI-corresponding link associated with the missing POI, including the name of the polygon Polygon information search means to perform,
When the specific polygon information is detected by the polygon information search means, the name of the polygon included in the detected specific polygon information and the POI information corresponding to the POI lacking relative position information are included. Name matching determination means for determining whether the name of the polygon and the name of the relative position information lack POI match by comparing the name of the POI lacking relative position information included;
Corresponding to the POI corresponding link corresponding to the relative position of the polygon with respect to the POI corresponding link with respect to the corresponding POI in which the determination result of the name matching determination means is affirmative in the POI lacking relative position information Relative position determining means for determining a relative position of the corresponding road as a relative position of the corresponding POI with respect to the corresponding road;
A POI icon indicating the relevant POI is displayed at a position on the relative position side of the relevant POI determined by the relative position determining means with respect to the relevant road on the predetermined image. The POI icon indicating the relative position information-containing POI for which the determination result of the relative position information presence / absence determining means is positive corresponds to the POI correspondence link associated with the relative position information-containing POI on the predetermined image Display processing means for displaying at a position on the relative position side indicated in the information on the relative position of the relative position information-containing POI with respect to the road to be operated.   The navigation apparatus according to claim 3, wherein the predetermined image is an enlarged view of an intersection.   The navigation device according to claim 3 or 4, wherein the display target POI includes at least one of a destination and a waypoint.   Relative position information recording means for recording the relative position of the relevant POI determined by the relative position determining means in the first storage means as information on the relative position of the relevant POI with respect to the relevant road. The navigation apparatus according to any one of claims 3 to 5, wherein the navigation apparatus is characterized in that

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