JP2010038860A - Navigator and facility search method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigator and a facility search method for presenting only service/parking areas positioned in own vehicle advance directions out of service/parking areas matched with a retrieval condition. <P>SOLUTION: The navigator displays a facility list screen expressing SA/PA in a retrieving district in a list (a), and narrows down only SA/PA connecting SA/PA included in the list to a section of an advance direction side of an own vehicle of a route of a highway (c) if a button 703 of "narrowing down in an advance direction" of the facility list screen is operated. Herein, a current position is SA/PA connected to a section of the advance direction side of the own vehicle of a route of the highway concerning SA/PA being the side of a passage direction (an upward direction if an up route, and a downward direction if a down route) of a route from the current position upward thereof. In addition, a recommended route is SA/PA connected to a section of the advance direction side of the own vehicle of a route of the highway of a used route from a passage start point on the route of the recommended route. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a facility search technique in a navigation device mounted on an automobile.

As a facility search technology in a navigation device mounted on a car, facility information in which a facility name, a category such as a parking area, a service area, a restaurant, and the position of the facility are registered in advance for a plurality of facilities. In addition to receiving search conditions based on the name of the target facility, region, and category from the user, search for facility information that matches the received search condition, and display a list of information such as the name of the searched facility. A technique for displaying is known (for example, Patent Document 1).

In addition, as a technology for presenting facility information in the navigation device, a technology for searching for facilities such as a plurality of parking areas and service areas closest to the current location in front of the traveling direction while traveling on a highway, and displaying information on the searched facilities, etc. Is also known (for example, Patent Document 2).
JP 2001-50768 JP-A-9-61186

  When applying a technology for displaying a list of facility information that matches the search conditions received from the user, for facilities associated with expressways such as service areas and parking areas, It is common to include an indication that the facility is a facility that can be used from the up lane side or a facility that can be used from the down lane side. However, even if such a display is performed, in an unfamiliar area where the user cannot grasp which direction the expressway is going up and which direction is going down, the user It is not possible to identify whether the displayed service area or parking area is a facility located on the traveling direction side, or whether it is a facility that can be used from the traveling lane side.

  On the other hand, according to the technology for searching for a facility such as a parking area or a service area that is ahead in the traveling direction while traveling on the expressway and displaying information on the searched facility, the facility is ahead in the traveling direction of the traveling expressway. Only a limited number of parking areas and service areas are presented, and the user cannot search for other parking areas and service areas.

  Therefore, the present invention provides a search received from the user so that the user can identify whether the facility is located on the traveling direction side or whether the facility is available from the traveling lane side. It is an object of the present invention to provide a navigation device capable of presenting information on a facility searched according to conditions.

  To achieve the above object, the present invention provides a navigation device mounted on an automobile corresponding to each facility attached to a highway, a facility name representing the name of the corresponding facility, and a corresponding facility name. A facility information storage unit that stores facility information in which a facility location indicating a location, an uplink route that constitutes an expressway, and a downlink route that respectively constitutes a route, and a route to which a corresponding facility is connected are registered; A current position calculation unit that calculates the current position of the car, a facility search unit that searches for a facility that matches a search condition specified by a user based on the facility information, and each facility that the facility search unit has searched for, A direction direction calculation unit that calculates a direction of an area or a point where a route to which the facility is connected is viewed from the current position calculated by the current position calculation unit as a direction direction of the facility, and Search facility information that displays a list of information including the facility name registered in the facility information corresponding to the facility and the direction direction calculated by the direction direction calculation unit for the facility for each facility searched by the facility search unit And a list display section.

  According to such a navigation device, the information including the facility name of the facility that matches the search condition specified by the user is displayed together with the area or the point of the route to which the facility is connected as viewed from the current position. . Therefore, the user can easily grasp from the display whether each facility is a facility connected to a route in which direction.

  Here, in such a navigation device, in the direction direction calculation unit, for each facility searched by the facility search unit, a route to which the facility is connected is viewed from the current position calculated by the current position calculation unit. As the direction, it is also possible to calculate the area or point nearest to the current position on the side of the direction from the current position to the area or point that is preset as the area or point through which the route to which the facility is connected passes. Good.

By doing in this way, the direction to which the facility connected to the facility viewed from the current position is indicated by the form using the region or point closer to the current position for display in the direction of the direction, so that the user can more of the route It becomes easy to grasp the direction to go.
Moreover, in order to achieve the said subject, this invention respond | corresponds with the facility name showing the name of the corresponding facility provided in the navigation apparatus mounted in a motor vehicle corresponding to each facility attached to a highway. A facility information storage unit that stores facility information in which facility locations that indicate the location of the facility and the routes to which the corresponding facilities connect are registered, with each of the upward and downward routes constituting the expressway as routes. A current position calculation unit that calculates a current position of the automobile, a facility search unit that searches for a facility that matches a search condition specified by a user based on the facility information, and a facility that the facility search unit has searched for From the current position calculated by the current position calculation unit and the facility position registered in the facility information, a facility that is connected to a section on the traveling direction side of the vehicle on the route that constitutes the expressway An extracted facility information list display unit that displays an extracted facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility extracted and extracted by the facility extraction unit; It is provided.

  According to such a navigation device, it is possible to extract only the facilities that connect to the section on the traveling direction side of the car on the route that constitutes the expressway out of the facilities that match the search condition and present them to the user. Therefore, the user can easily identify facilities that are on the traveling direction side and can be used while traveling in the traveling direction.

  Here, such a navigation device is a search facility that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit in the navigation device. A search facility information list display unit for displaying an information list is provided. In the extracted facility information list display unit, when the search facility information list display unit displays the search facility information list, When the narrowing down by the traveling direction is instructed, the extracted facility information list may be displayed. Or the search facility information list display which displays the search facility information list which is a list of the information including the facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit on the navigation device In the search facility information list display unit, when the extracted facility information list display unit displays the extracted facility information list, the user is instructed to cancel the narrowing down according to the traveling direction of the facility. In this case, the search facility information list may be displayed.

  By doing so, the user can arbitrarily display all the facilities that match the search condition, or display only the facilities connected to the section on the traveling direction side of them. The desired facility can be found out in various forms combining both.

  In addition, for each facility searched by the facility search unit, the navigation device as described above, the area or point direction to which the route to which the facility is connected is viewed from the current position calculated by the current position calculation unit. A facility direction calculation unit that calculates the direction of the facility, and a facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit in the search facility information list display unit; You may make it display the list of information including the direction direction which the said direction direction calculation part calculated about the said facility as said search facility information list. Further, in this case, in the direction direction calculation unit, for each facility searched by the facility search unit, as viewed from the current position calculated by the current position calculation unit, the direction to which the route to which the facility connects is directed, It is also preferable to calculate a region or a point closest to the current position on the direction side of the route from the current position among regions or points set in advance as a region or a point through which the route to which the facility is connected passes.

  More specifically, the navigation device as described above is connected to a route constituting the highway where the current position is located among the facilities searched by the facility search unit in the extracted facility information list display unit. For the facility to be connected, only the facility that is connected to the route where the current position is located on the direction side toward the route from the current position is connected to the section on the traveling direction side of the vehicle on the route constituting the expressway. It may be extracted as a facility. Further, the navigation device is provided with a route guidance unit that searches for a route to the destination selected by the user and guides traveling along the route. In the extracted facility information list display unit, the facility search unit includes: Of the searched facilities, the facilities that connect to the route that constitutes the expressway through which the route passes are connected to the route that passes through the route on the direction side of the route from the starting point position on the route. Only the existing facility may be extracted as a facility that is connected to a section on the traveling direction side of the automobile on the route constituting the expressway.

  Further, the navigation device as described above includes a first route that is a route to the facility among the facilities searched by the facility search unit in the extracted facility information list display unit, and a route that connects the facility The second route that is the route to the nearest point of the facility on the route that goes in the opposite direction to the route that connects the facility that constitutes the same expressway is searched, and the first route is from the second route A short facility is extracted as a facility that is connected to a section of the route that constitutes the expressway on the traveling direction side of the automobile, and a facility in which the second route is shorter than the first route is a route that constitutes the expressway. You may comprise so that it may not extract as a facility connected to the area of the said advancing direction side of the said motor vehicle. Further, the navigation apparatus as described above is based on a first point that is a point around the facility on a route connected to the facility among the facilities searched by the facility search unit in the extracted facility information list display unit. Also, the second point, which is a point that has traveled along the route from the first point in the direction of the route, is a facility that has a greater distance from the current position. As a facility connected to the section of the vehicle, the facility where the first point is larger than the current position than the second point is connected to the section on the traveling direction side of the car on the route constituting the highway. You may comprise so that it may not extract as a facility to do. In addition, the navigation device as described above includes a route guidance unit that searches the navigation device for a route to the destination selected by the user and guides traveling along the route, and displays the extracted facility information list In the section, from the first point which is the point around the facility on the line connected to the facility among the facilities searched by the facility search unit, the route is advanced in the direction of the route from the first point. A facility where the second point, which is a dead-end point, connects a facility having a larger distance from the current position and a smaller distance from the destination to a section on the traveling direction side of the vehicle on the route constituting the highway. And the first point is larger in distance from the current position than the second point, or the first point is smaller in distance from the destination than the second point. The have facilities may be configured so as not to extract as a facility for connecting to the advancing direction of the section of an automobile routes constituting the highway.

  In each navigation device described above, the facilities attached to the expressway may be a service area and a parking area.

  As described above, according to the present invention, the user can identify whether the facility is located on the traveling direction side or whether the facility is available from the traveling lane side. The facility information searched according to the search condition received from the user can be presented.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 shows a configuration of a navigation system according to the present embodiment.
The navigation system is a device mounted on an automobile, and includes a navigation device 1, an operation unit 2, a display device 3, a vehicle state sensor 4, and a GPS receiver 5 as illustrated. Here, the vehicle state sensor 4 is a sensor group that detects various states of the vehicle, such as an azimuth sensor such as an angular acceleration sensor or a geomagnetic sensor, or a vehicle speed sensor using a vehicle speed pulse sensor.

  Then, the navigation device 1 uses a map data storage unit 11 that is a storage device such as a DVD drive or HDD that stores map data representing a map, a current state calculation unit 12, a GUI using the operation unit 2 and the display device 3 as a user. A GUI control unit 13, a route search unit 14, a memory 15, a control unit 16, and a guidance image generation unit 17.

  However, the above navigation apparatus 1 may be a CPU circuit having a general configuration including peripheral devices such as a microprocessor, a memory, and other graphic processors and geometric processors in terms of hardware. In this case, each unit of the navigation device 1 described above may be realized as a process embodied by a microprocessor executing a program prepared in advance. In this case, such a program may be provided to the navigation apparatus 1 via a recording medium or an appropriate communication path.

Next, FIG. 2 shows the contents of the map data stored in the map data storage unit 11.
As shown in the figure, the map data includes management data describing the version of the map data, basic map data representing the map, route data, facility data, and expressway direction data.
The basic map data includes a road unit that represents a road network and a drawing unit that defines a display map.
Next, the road unit is data representing a road network, and includes a node list, a link table, and connection data.
Here, in the road unit, each route of the road is expressed as a set of links that are straight lines, and an end point of each link is a node. The node list is data indicating the coordinates of each node, attributes indicating whether the node corresponds to the intersection of each node, and the like. In addition, the link table indicates the identification of nodes at both ends of each link, the distance and direction of each link, the link cost that is the cost for route search given to each link, the route number of the route to which the link belongs, etc. It is data. The connection data is data describing connection and correspondence of nodes and links. Note that at least the expressway is provided with links constituting each route, with each route being one route for each of the upward direction and the downward direction. However, in the present embodiment, toll roads and other automobile lanes in which the upstream lane and the downstream lane are separated are collectively referred to as a highway.

  Next, the drawing unit displays on the map such as the building name, the road name, and the intersection name, and the figure unit that defines each figure that becomes the geographical display element of the map such as the topographical figure, the road figure, and the building figure. It has a character string unit that defines each character string, and an icon unit that defines an icon that is a mark to be displayed on a map in order to indicate the presence of a facility such as a parking lot or a gas station.

  Next, the route data included in the map data has a route record provided for each road route, and each route record includes a route number that is an identifier of the route, a highway, a national road, and a prefectural road of each route. And the route name of each route is described. Here, in this embodiment, regarding the expressway, each of the upward direction and the downward direction of the expressway is regarded as one route, and a route record is provided for each. Then, different route numbers and route types of the expressway up or the expressway down are registered in the route for each of the up / down directions of the expressway. Further, the route numbers of the same highway for each up / down direction are different from each other only in the branch number so that both routes constitute the same highway.

  In addition, the facility data of the map data indicates information about each facility preset by the map data creator in the map data, and expressway facilities representing information of facilities connected to the expressway such as service areas and parking areas Data and general facility data representing information of other facilities are included.

  The expressway facility data has an expressway facility record provided for each facility attached to the expressway such as a service area and a parking area. Each expressway route record includes a type such as a service area and a parking area of the facility. Type of facility indicating the name of the facility, name of the facility indicating the name of the facility, the location of the facility indicating the location of the facility, the attached route information indicating the route number of the highway to which the facility is attached, and the road indicating the connection position between the facility and the highway The connection information and detailed information indicating the equipment provided in the facility are registered.

  Next, the highway direction data of the map data has a route direction record provided for each route in the up / down direction of the expressway, and each route direction record includes the route number of the route, the end point direction It has information and area data for each section. In the end point direction information, the area / point to which the interchange that is the end point of the route (upward side end for an upstream route, and downstream side end for a downstream route) is registered is registered as direction information.

Further, in the section data for each section, a section record for each section provided for each section of the route is registered, and in each section record for each section, section information indicating the section and progress to the user traveling in the section are recorded. Direction information representing the region / location direction used for direction guidance is registered.
Here, the section in which the section record for each section is provided and the direction information to be registered in the section record for each section are determined as shown in FIG. 3, for example.
That is, as shown in FIG. 3, there is an upward route 301 and a downward route 302 of a certain highway, and the main areas / points A, B, and C through which the highway passes are connected to the highway. When there are interchanges 311-316, each route is divided into a plurality of sections by these interchanges.

  The area / point to which the interchange at the end of the traffic direction of each section (upward if it is an upstream route, and downward if it is a downstream route) is connected is recorded as direction information in the section record for that section. The area / point to be registered. As a result, for example, a section direction record is provided for the section between the interchanges 311 and 312 on the upward route 301 shown in the figure, and the interchange that becomes the end of the section on the upstream side is provided in the section record. Area B to which 312 is connected is registered as direction information. Further, a section direction record is provided for the section between the interchanges 312 and 313 on the upstream route 301, and an interchange 313 serving as an end on the upstream side of the section is connected to the section record. Region C is registered as direction information.

  Similarly, a section direction record is provided for the section between the interchanges 314 and 315 on the down route 302, and the interchange 315 that is the end of the section in the downstream direction is connected to the section record. Area B to be registered is registered as direction information. In addition, a section direction record is provided for the section between the interchanges 315 and 316 on the downstream route 302, and an interchange 316 serving as an end on the downstream side of the section is connected to the section record. Area A is registered as direction information.

It should be noted that the interchange that is the end point is included in the section direction record of the section immediately before the end point of each route (upward side edge of the route if it is an upward route, and downstream side end of the route if it is a downward route). Register the area / point to connect as direction information.
Now, in such a configuration, the current state calculation unit 12 of the navigation device 1 repeatedly performs the following processing.
That is, the current state calculation unit 12 determines the previous position indicated by the road unit of the basic map of the map data read from the map data storage unit 11 with respect to the current position estimated from the outputs of the vehicle state sensor 4 and the GPS receiver 5. Map matching processing with the map around the current position is performed, and the most probable coordinates as the current position and the most probable direction as the current traveling direction are determined as the current position and the current traveling direction, respectively, and the memory Set to 15.

  In response to a user destination setting request, the control unit 16 receives a destination setting such as an intermediate destination or a final destination from the user via the operation unit 2 or the GUI control unit 13, and stores it in the memory. Set to 15. The operation of setting a service area and a parking area as the destination will be described in detail later.

  When the destination setting is accepted, the control unit 16 causes the route search unit 14 to search for a recommended route that reaches the final destination via the intermediate destination. The route search unit 14 reads the data of the road unit in the necessary geographical area from the map data storage unit 11, and finds the route with the lowest cost via the intermediate destination from the current position set in the memory 15 to the final destination. The recommended route is calculated based on a predetermined cost model such as a minimum distance, and the calculated route data of the recommended route is set in the memory 15.

In addition, when the current position set in the memory 15 becomes near the final destination, the control unit 16 determines that the destination has arrived and clears the destination and the recommended route set in the memory 15. Do.
The guide image generation unit 17 then maps the map display range calculated by the control unit 16 according to the current position set in the memory 15 or the point designated by the user with the cursor and the map display scale set at that time. The image is drawn based on the road unit or drawing unit of the map data stored in the map data recording unit. Further, a guide image in which a graphic representing the current position, recommended route, and destination set in the memory 15 is drawn on the drawn map image is generated and displayed on the display device 3 via the GUI control unit 13.

  FIG. 4a shows an example of the guide image 400 displayed on the display device 3 in this way. In the example shown, the display range of the map is determined based on the current position. The guide image 400 is a map image 401 around the current position where a current position mark 402 representing the current position is displayed. When the recommended route is set, a route graphic representing the recommended route in the map display range is displayed on the map image 401 in the guide image 400, and the destination is included in the display range. In this case, the destination mark indicating the destination is also displayed on the map image 401.

  Further, the control unit 16 displays a command button for accepting various user instructions via the GUI control unit 13 at the lower part of the guide image 400, and allows the user to operate the command button via the operation unit 2. Perform appropriate processing. For example, in FIG. 4A, as the command button set 405, a map scale change wide area button and detail button 4051, various menu call menu buttons 4052, and a destination setting destination button 4053 are set. Provided.

Hereinafter, as described above, the details of the processing for setting the service area (SA) or the parking area (PA) as the destination in the navigation device 1 will be described.
That is, when the destination button 4053 is operated, the control unit 16 first displays the genre reception genre search screen 410 shown in FIG. 4B on the display device 3 via the GUI control unit 13, and the destination is displayed by the user. The genre of the facility set in is accepted as the search genre. Here, on the genre search screen 410, the control unit 16 displays a list of facility types in the genre list 411, and searches for the facility type selected in the genre list 411 when the setting button 412 is operated. Accept as a genre.

Here, when setting the service area (SA) or the parking area (PA) as the destination, the user sets “SA / PA” as the search genre.
When the search genre is received, the display of the genre search screen 410 is erased, and the region search screen 420 for region reception shown in FIG. 4C is displayed on the display device 3 via the GUI control unit 13, and from the user. The area where the facility set as the destination is located is accepted as the search area. Here, in this area search screen 420, the control unit 16 displays a list of prefectures in the area list 421, and searches for the prefecture selected in the area list 421 when the setting button 422 is operated. Accept as a region.

If the search area is accepted, the display of the area search screen 420 is deleted. When “SA / PA” is set as the search genre, the control unit 16 executes the SA / PA search process shown in FIG.
As shown in the figure, in this SA / PA search process, first, either a service area or a parking area is registered as a facility type, and a facility location within a prefecture set as a search region is registered. A road facility record is searched from map data (step 502).
Then, a direction direction that represents the direction of travel of the route connected by the SA / PA that searched the highway facility record using the direction is calculated (step 504). Here, this direction is the direction of the area / point registered in the end point direction information of the route direction record of the route obtained from the attached route information of the expressway facility record of the SA / PA, that is, the SA / PA is The direction of the direction of the area / point of the end point of the connected route (upward side end for an upstream route, and downstream side end for a downward route), indicating the direction of travel of the route to which SA / PA is connected Calculate by taking the direction.

However, the direction direction indicating the traffic direction of the lane to which the SA / PA is connected may be determined as follows based on the current position set in the memory 15.
That is, first, for the SA / PA that is connected to a route that constitutes a highway that includes a traveling route that is a route above it, the direction of the direction is determined as follows.
First, the direction information of the section direction record of the section including the current position is obtained, and the direction direction represented by the obtained direction information is a direction direction representing the traffic direction of the route connected by the SA / PA connected to the traveling route. To do.
Next, calculate the nearest point of the current position on the route that is the opposite lane of the traveling route that constitutes the same expressway as the traveling route, and the section record for each section of the section that includes the calculated nearest point The direction information represented by the obtained direction information indicates the traffic direction of the route connected to the SA / PA that is connected to the route that is the opposite lane of the running route and that is the same highway as the running route. The direction is the direction.

  Thus, for example, as shown in FIG. 6a, when the current position is at a position 603 on the route 602 on the downstream side of the expressway, the direction information is included in the section-specific direction record of the section including the current position 603. Since the area / point B is registered, the direction of the area / point B is set as a direction indicating the traffic direction of the route connected by all SA / PAs connected to the traveling route 602. In addition, the nearest point of the current position 603 on the upward line 601 that constitutes the same highway as the traveling route 602 is the point 604, and the section direction record of the section including the nearest point 604 includes: Since the region / point C is registered as the direction information, the direction of the region / point C is set as the direction indicating the traffic direction of the route connected by all the SA / PAs connected to the route 601.

In addition, for the SA / PA that is connected to the highway other than the highway that includes the route on the current position and that constitutes the highway through which the recommended route passes, each highway that the recommended route passes through For each road, determine the direction of the direction as follows.
First, a point that is a starting point of the recommended route on the expressway is used as a starting point, and a route including the starting point is obtained as a planned traveling route.
Then, the direction information of the section direction record of the section including the start point is obtained, and the direction direction represented by the obtained direction information is the direction direction representing the traffic direction of the route connected by the SA / PA connected to the planned travel route, and To do.
Next, calculate the nearest point to the starting point on the route that is the opposite lane of the scheduled route that constitutes the same expressway as the scheduled route, and the direction of the record for each section of the section that includes the calculated point The direction indicating the direction of travel of the route connected to the SA / PA that connects to the route that is the opposite lane of the planned traveling route and that forms the same highway as the planned traveling route, and the direction direction represented by the obtained direction information is obtained The direction.

  Accordingly, for example, as shown in FIG. 6b, a recommended route 612 from the current position 611 is set, and the recommended route starts using the route 614 in the upward direction of the expressway from the point 613. In this case, the route 614 becomes the planned traveling route, and the point 613 becomes the starting point. Since the area / point B is registered as the direction information in the section direction record of the section including the start point 613, all SA / PAs that connect the direction of the area / point B to the planned travel route 614 are stored. The direction of the road represents the direction of traffic on the connected route. In addition, the nearest point of the starting point 613 on the downward line 615 that constitutes the same highway as the planned route 614 is the point 616, and the section record for each section of the section including the nearest point 616 includes: Since the area / point A is registered as the direction information, the area / point A direction is set to the direction indicating the traffic direction of the route connected by all the SA / PAs connected to the route 615.

  In addition, the current position is not an expressway including a route above it, and an expressway that does not pass through a recommended route, and is connected to a route that constitutes an expressway connected to an interchange within a predetermined distance from the current position. As for / PA, the direction of the direction is determined as follows for each highway where an interchange exists within a predetermined distance from the current position.

  That is, first, for each route composing the expressway, among the interchanges within a predetermined distance from the current position connected to the route, the nearest point on the route that is closest to the interchange in the direction of travel of the route. The nearest point. Then, the direction information of the section direction record of the section including the calculated nearest point is obtained, and the direction direction represented by the obtained direction information is the direction representing the traffic direction of the route connected by the SA / PA connected to the route. The direction.

  Thus, for example, as shown in FIG. 6c, when there are an upward route 622 and a downward route 623 as the routes constituting an expressway having an interchange within a predetermined distance L from the current position 621, The direction of the direction indicating the direction of travel of the route connected by the SA / PA connected to each route 622, 623 is determined as follows. In addition, the black circle in each figure of FIG. 6 represents the interchange.

  That is, for the upward route 622, the interchange on the most upstream side among the interchanges within the predetermined distance L from the current position 621 is 624, and each section of the section including the point on the route 622 nearest to the interchange 624 is included. Since the area / point C is registered as the direction information in the direction record, the direction of the area / point C direction is a direction direction that represents the traffic direction of the route connected by all SA / PAs connected to the route 622. To do. Similarly, regarding the downward route 623, the interchange on the most downward direction among the interchanges within the predetermined distance L from the current position 621 is 625, and the section including the point on the route 6223 nearest to the interchange 625 is included. Since the area / point A is registered as direction information in the direction record for each section, the direction indicating the direction of the area / point A direction indicates the traffic direction of the route connected by all SA / PAs connected to the route 623. The direction.

For other SA / PAs that make up the expressway, the end point of the line to which the SA / PA is connected (upward side end for an upstream route, downstream side end for a downstream route) The direction of the area / point is set as a direction indicating the traffic direction of the route to which the SA / PA is connected.
Returning to FIG. 5, if the direction direction indicating the traffic direction of the route connected by the SA / PA that searched for the expressway facility record in this way is calculated (step 504), each of the searched expressway facility records A facility list screen showing a list of SA / PA facility names along with the direction of direction calculated for each SA / PA is displayed on the display device 3 via the GUI control unit 13 (step 506).

Here, for example, as shown in FIG. 7 a, this facility list screen includes a facility list area 701, a detailed information area 702, a “narrow down in the traveling direction” button 703, a “cancel” button 704, and a “purpose” It is assumed that a “set to ground” button 705 is provided.
In the facility list area 701, a list of facility names of the respective SA / PAs searched for the expressway facility record, and the SA / PA calculated in step 504 for the SA / PA after the facility name of each SA / PA. Is displayed in a form that represents the direction of the direction of the route to which is connected. According to such a display of the facility list area 701, it is possible to easily grasp the direction of traffic viewed from the current position of the route to which each SA / PA is connected than the display of the direction of the direction represented by using the region / point. become able to. Further, as shown in FIG. 6, if a region or a point closer to the current position is used for the display of the direction of the direction, it becomes easier to grasp the direction of the route to which each SA / PA is connected.

  Then, when such a facility list screen is displayed, an operation of selecting an SA / PA facility name in the facility list area 701 (step 508) and an operation of the “narrow down in the traveling direction” button 703 are performed. The occurrence (step 510), the occurrence of the operation of the “cancel” button 704 (step 512), and the occurrence of the operation of the “set to destination” button 705 (step 514) are monitored.

  If an operation for selecting a facility name of SA / PA in the facility list area 701 on the facility list screen has occurred (step 508), the SA / PA with the selected facility name is set as the selected facility (step 510). 5b), as shown in FIG. 5b, in the detailed information area 702, the guide map 7021 of the selected facility and the detailed information 7022 such as the attached facilities of the selected facility registered in the highway facility record of the selected facility are displayed. Return to the monitoring of steps 508-514. Here, the guide map 7021 is a route of an expressway on which a current location 70212, a selected facility location 70213, and a selected facility that is SA / PA are connected to a map 70211 in a range including the selected facility and the current location. It is assumed that the direction of traffic between 70214 and the route 70214 to which the selected facility is connected is represented by an arrow 70215.

  On the other hand, when the operation of the “narrow down in the direction of travel” button 703 on the facility list screen occurs (step 510), the self-route of the expressway route in the SA / PA searched for the expressway facility record in step 502 is displayed. As shown in FIG. 5c, the SA / PA that displays information on the facility name and direction is displayed in the list of the facility list area 701 on the facility list screen. Then, only the SA / PA connected to the section on the direction of travel of the own vehicle on the highway route is narrowed down (step 520). That is, information on the facility name and direction other than the SA / PA connected to the section on the traveling direction side of the current position of the vehicle on the highway route is excluded from the list displayed in the facility list area 701. Then, the process returns to the monitoring of steps 508-514. Here, details of how to obtain the SA / PA connected to the section of the highway route on the traveling direction side of the own vehicle will be described later. The “narrow down in the direction of travel” button 703 temporarily narrows down the SA / PA that displays information in the list of the facility list area 701 on the facility list screen according to the operation of the “narrow down in the direction of travel” button 703. Is deleted from the facility list screen as shown in FIG. 5c. Here, by such a “narrow down in the direction of travel” button 703, SA / PA for displaying information on the name of the facility and the direction of the direction is displayed in the list of the facility list area 701 on the facility list screen. By narrowing down to only SA / PAs connected to the section on the traveling direction side of the own vehicle, the user can easily search for only SA / PAs that are in the traveling direction of the own vehicle and can be used while traveling in the traveling direction. Will be able to.

  Next, when an operation of the “set to destination” button 705 on the facility list screen occurs (step 514), the selected facility set at that time is set as an intermediate destination or a final destination. The inquiry screen as shown in FIG. 5d is used to inquire the user, the selected facility is set as the intermediate destination or the final destination according to the instruction (step 522), and the inquiry screen and the facility list screen are displayed. Is deleted (step 524), and the SA / PA search process is terminated.

On the other hand, when an operation of the “cancel” button 704 on the facility list screen occurs (step 512), the display of the facility list screen is deleted (step 524), and the SA / PA search process is terminated.
Hereinafter, a method of calculating SA / PA connected to a section on the traveling direction side of the own vehicle on the highway route performed in step 520 described above will be described.
First, among the SA / PAs searched for in step 502, the SA / PA whose current position is connected to a route constituting a highway including a traveling route that is a route above the SA / PA is as follows. It is determined whether or not the SA / PA is connected to the section of the road on the traveling direction side of the own vehicle.

That is, for the SA / PA whose current position is closer to the traveling direction side of the current route than the current position of the traveling route above it, the SA / PA connected to the section of the highway route on the traveling direction side of the own vehicle. It is assumed that other SA / PAs are not SA / PAs connected to a section on the traveling direction side of the own vehicle on a highway route.
Thus, for example, as shown in FIG. 8a, when the current position is at a position 803 on the downstream line 802 of the expressway composed of the upstream route 801 and the downstream route 802, the downstream side In the section 804 from the current position 803 of the route 802 to the end point E of the route 802, all SA / PAs connected to the route 802 are SA / PAs connected to the section of the highway route on the traveling direction side of the own vehicle. It becomes. On the other hand, in the section from the current position 803 of the downward route 802 to the starting point S of the route 802, all SA / PAs connected to the route 802 and all SA / PAs connected to the upward route 801 are: It is not a SA / PA connected to the section of the highway route on the traveling direction side of the vehicle.

  Next, for the SA / PA that is connected to a highway other than the highway including the route on which the current position is located and that constitutes the highway through which the recommended route passes, each recommended route passes through For each expressway, it is determined whether the SA / PA is connected to a section on the traveling direction side of the own vehicle on the route of the expressway as follows.

  That is, first, a point serving as a starting point of passage of a recommended route on an expressway is used as a starting point, and a route including the starting point is obtained as a planned traveling route. The SA / PA on the planned travel route that is closer to the direction of travel than the starting point is the SA / PA that is connected to the section on the direction of travel of the vehicle on the highway route, and other SA / PAs Suppose that the vehicle is not an SA / PA connected to a section on the traveling direction side of the own vehicle on the highway route.

  Thus, for example, as shown in FIG. 8 b, a recommended route 812 from the current position 811 is set, and the recommended route 812 is an expressway constituted by an up route 814 and a down route 815 from a point 813. In the case where the use of the upward route 814 is started, the route 814 becomes the planned traveling route and the point 813 becomes the starting point. Then, in the section 816 from the starting point 813 of the route 814 to the end point E of the route 814, all SA / PAs connected to the route 814 are connected to the section of the highway route on the traveling direction side of the own vehicle. SA / PA. On the other hand, in the section from the starting point 813 of the upward route 814 to the starting point S of the route 814, all SA / PAs connected to the route 814 and all SA / PAs connected to the downward route 815 are: It is not a SA / PA connected to the section of the highway route on the traveling direction side of the vehicle.

Next, with regard to SA / PA that is connected to a route that constitutes a highway that is not a highway that includes a route above it and that does not pass through a recommended route, the vehicle of the highway route is as follows. It is determined whether or not the SA / PA is connected to the section on the traveling direction side.
That is, first, the route search unit 14 is caused to search for a route to the SA / PA. Next, the nearest point of the SA / PA on the route constituting the opposite lane of the same expressway as the route to which the SA / PA is connected is obtained, and the route to the found nearest point is sent to the route search unit 14. Let them search.

  If the route to the SA / PA is shorter than the route to the nearest point, the SA / PA is connected to the section of the highway route on the traveling direction side of the own vehicle. If the route to the nearest point has a shorter travel distance, it is assumed that the SA / PA is not an SA / PA that is connected to a section of the highway route on the traveling direction side of the own vehicle.

  Thus, for example, as shown in FIG. 9 a 1, an SA / PA 901 for determining whether to connect to a section on the traveling direction side of the own vehicle on a highway route is composed of an upstream route 902 and a downstream route 903. When connected to the up-route 902 of the expressway, the route 906 from the current location 904 to the SA / PA 901 and the current location 904 from the current location 904 to the nearest point 905 of the SA / PA 901 on the down-route 903 A route 907 is obtained. In the illustrated example, since the route 907 from the current position 904 to the nearest point 905 has a shorter route distance, the SA / PA 901 is connected to the section of the highway route on the traveling direction side of the own vehicle. It is determined that it is not / PA.

  On the other hand, as shown in FIG. 9a2, the SA / PA 911 for determining whether or not to connect to the section on the traveling direction side of the own vehicle on the highway route of the vehicle is composed of the upstream route 912 and the downstream route 913. When connected to the down line 913 of the expressway, the route 916 from the current position 914 to the SA / PA 911 and the current position 914 to the nearest point 915 of the SA / PA 911 on the up line 912 A route 917 is determined. In this example, since the route 916 from the current position 914 to the SA / PA 911 has a shorter travel distance, the SA / PA 911 is connected to the section on the traveling direction side of the own vehicle on the route of the highway. It is determined to be PA.

  By the way, as for SA / PA that is connected to a route that constitutes a highway that is not a highway that includes a route above it and that does not pass through a recommended route, the current position of the vehicle on the highway route is as follows. You may make it determine whether it is SA / PA connected to the area of the advancing direction side.

  That is, as shown in FIGS. 9 b 1 and b 2, the facility 921 of the route connected by the facility 921 that is an SA / PA that determines whether to connect to the section on the traveling direction side of the own vehicle on the route of the highway, Find the point P1 that has returned the journey distance D branch line in the direction opposite to the direction of travel of the route, and the point P2 that has traveled the route distance D branch line in the direction of travel of the route, rather than the facility 921, and P1 is the current position than P2 If the facility 921 is an SA / PA that is connected to a section on the direction of travel of the own vehicle on the expressway route when close to 922, and if P2 is closer to the current position 922 than P1, the facility 921 is fast It may be configured not to be an SA / PA connected to a section on the traveling direction side of the own vehicle on the road line. In the case shown in FIG. 9b1, since P2 is closer to the current position 922 than P1, the facility 921 is determined not to be an SA / PA connected to a section on the traveling direction side of the own vehicle on the highway route. In the case shown in 9b2, since P1 is closer to the current position 922 than P2, it is determined that the facility 921 is an SA / PA connected to a section on the traveling direction side of the own vehicle on the highway route.

  In addition, when the final destination is set for SA / PA that is connected to a route that constitutes a highway that is not a highway that includes a route above it and that does not pass the recommended route, You may make it determine whether it is SA / PA connected to the area of the direction of the own vehicle of the route of an expressway as follows.

  That is, as shown in FIGS. 10a, b, c, and d, the facility of the route connected by the facility 1001 that is the SA / PA that determines whether or not to connect to the section on the traveling direction side of the own vehicle on the route of the highway. More than 1001, a point P1 that has returned the journey distance D branch line in the direction opposite to the direction of travel of the route, and a point P2 that has traveled the route distance D branch line in the direction of travel of the route from the facility 1001, and P1 is P2 If the facility 1001 is connected to a section on the traveling direction side of the own vehicle on the route of the expressway when P2 is closer to the final destination 1003 than P1 than the current position 1002, in other cases The facility 1001 may not exist in the traveling direction of the own vehicle.

  In the case shown in FIG. 10a, since P2 is closer to the current position 1002 than P1 and P1 is closer to the final destination 1003 than P2, the facility 1001 is a section on the highway route on the traveling direction side of the own vehicle. It is determined that the connection is not SA / PA. In the case shown in FIG. 10b, P2 is closer to the final destination 1003 than P1, but P2 is closer to the current position 1002 than P1, so the facility 1001 is on the highway route on the traveling direction side of the own vehicle. It is determined that the SA / PA is not connected to the section. In the case shown in FIG. 10c, P1 is closer to the current position 1002 than P2, but P1 is closer to the final destination 1003 than P2, so that the facility 1001 is located on the highway route on the traveling direction side of the own vehicle. It is determined that the SA / PA is not connected to the section. In the case shown in FIG. 10d, since P1 is closer to the current position 1002 than P2, and P2 is closer to the final destination 1003 than P1, the facility 1001 is a section on the highway route on the traveling direction side. It is determined that the connection is SA / PA.

The SA / PA search process has been described above.
In the above SA / PA search processing, the SA / PA information searched according to the search conditions such as the search area designated by the user is displayed on the facility list screen, and in response to the “narrow down in the traveling direction” button 703 operation. The SA / PA that displays information on the facility list screen has been narrowed down to only the SA / PA that is connected to the section on the traveling direction side of the vehicle on the expressway route. You may make it narrow down SA / PA which displays display information on a list screen only to SA / PA connected to the section by the side of the direction of the own vehicle of an expressway route. In this case, it is preferable that the SA / PA that displays the display information on the facility list screen is changed to all the SA / PAs searched according to the search condition after receiving the user's instruction to cancel the narrowing down.

The embodiment of the present invention has been described above.
In the above embodiment, the case of searching for SA / PA has been described. However, the present embodiment can be similarly applied to a case where a highway attached facility such as an interchange or a junction is searched.
The present embodiment can also be applied when searching for various facilities connected to general roads other than highways. That is, in this case, the present embodiment may be applied as a road connecting the lanes facing each facility to the facility.

It is a block diagram which shows the structure of the navigation apparatus which concerns on embodiment of this invention. It is a figure which shows the content of the map data which concern on embodiment of this invention. It is a figure which shows the example of a setting of the area information for every area which concerns on embodiment of this invention. It is a figure which shows the example of a display of the navigation apparatus which concerns on embodiment of this invention. It is a flowchart which shows the SA / PA search process which concerns on embodiment of this invention. It is a figure which shows the example of calculation of the direction direction of the line which the service / parking area which concerns on embodiment of this invention connects. It is a figure which shows the example of a display of the navigation apparatus which concerns on embodiment of this invention. It is a figure which shows the example of determination whether the service / parking area which concerns on embodiment of this invention exists in the advancing direction side in the facility. It is a figure which shows the example of determination whether the service / parking area which concerns on embodiment of this invention exists in the advancing direction side in the facility. It is a figure which shows the example of determination whether the service / parking area which concerns on embodiment of this invention exists in the advancing direction side in the facility.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Navigation apparatus, 2 ... Operation part, 3 ... Display apparatus, 4 ... Vehicle state sensor, 5 ... GPS receiver, 11 ... Map data storage part, 12 ... Current state calculation part, 13 ... GUI control part, 14 ... Route Search unit, 15 ... memory, 16 ... control unit, 17 ... guide image generation unit.

Claims (20)

A navigation device mounted on a car,
The facility name indicating the name of the corresponding facility provided for each facility attached to the expressway, the location of the facility indicating the location of the corresponding facility, the upstream route and the downward route constituting the expressway A facility information storage unit that stores facility information in which each route is a route and a route to which the corresponding facility is connected is registered.
A current position calculating unit for calculating a current position of the automobile;
A facility search unit that searches for facilities that match the search conditions specified by the user based on the facility information;
For each facility searched by the facility search unit, the direction of the area or point to which the route to which the facility is connected, viewed from the current position calculated by the current position calculation unit, is calculated as the direction of the facility. A direction calculation unit;
A search facility that displays a list of information including the facility name registered in the facility information corresponding to the facility and the direction direction calculated by the direction direction calculation unit for the facility for each facility searched by the facility search unit A navigation device comprising an information list display unit. The navigation device according to claim 1,
For each facility searched by the facility search unit, the direction direction calculation unit has a route to which the facility is connected as a direction to which the route to which the facility connects is viewed from the current position calculated by the current position calculation unit. A navigation device characterized by calculating a region or a point closest to the current position on a side of the route from the current position in a region or point preset as a passing region or point. The navigation device according to claim 1,
The navigation apparatus characterized in that the facilities attached to the expressway are a service area and a parking area. A navigation device mounted on a car,
The facility name indicating the name of the corresponding facility provided for each facility attached to the expressway, the location of the facility indicating the location of the corresponding facility, the upstream route and the downward route constituting the expressway A facility information storage unit that stores facility information in which each route is a route and a route to which the corresponding facility is connected is registered.
A current position calculating unit for calculating a current position of the automobile;
A facility search unit that searches for facilities that match the search conditions specified by the user based on the facility information;
Based on the current position calculated by the current position calculation unit and the facility position registered in the facility information among the facilities searched by the facility search unit, the vehicle traveling direction side of the route constituting the highway The facility connected to the section is extracted, and the extracted facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility extracted by the facility extracting unit is displayed. A navigation device comprising a facility information list display unit. The navigation device according to claim 4,
A search facility information list display unit that displays a search facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit;
The extracted facility information list display unit is configured such that when the search facility information list display unit is displaying the search facility information list and the user is instructed to narrow down the facility according to the traveling direction of the facility, the extracted facility information list display unit A navigation apparatus characterized by displaying an information list. The navigation device according to claim 4,
A search facility information list display unit that displays a search facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit;
The search facility information list display unit, when the extracted facility information list display unit is displaying the extracted facility information list, when the user is instructed to cancel the narrowing down according to the traveling direction of the facility, A navigation device characterized by displaying a search facility information list. The navigation device according to claim 5,
For each facility searched by the facility search unit, the direction of the area or point to which the route to which the facility is connected, viewed from the current position calculated by the current position calculation unit, is calculated as the direction of the facility. Has a direction calculator,
The search facility information list display unit includes, for each facility searched by the facility search unit, a facility name registered in the facility information corresponding to the facility and a direction direction calculated by the direction direction calculation unit for the facility. A navigation apparatus that displays a list of information as the search facility information list. The navigation device according to claim 7,
For each facility searched by the facility search unit, the direction direction calculation unit has a route to which the facility is connected as a direction to which the route to which the facility connects is viewed from the current position calculated by the current position calculation unit. A navigation device characterized by calculating a region or a point closest to the current position on a side of the route from the current position in a region or point preset as a passing region or point. The navigation device according to claim 4,
The extracted facility information list display unit is configured to connect the current location to the route where the current position is located for the facility connected to the route constituting the expressway where the current location is located among the facilities searched by the facility search unit. A navigation apparatus characterized in that only facilities that are connected on the direction side of the route from the position are extracted as facilities that are connected to a section of the route that constitutes the expressway on the traveling direction side of the vehicle. The navigation device according to claim 4,
It has a route guidance unit that searches for a route to the destination selected by the user and guides the traveling along the route,
The extracted facility information list display unit includes, for facilities connected to a route constituting an expressway through which the route passes among the facilities searched by the facility search unit, the route of the route corresponding to the route through which the route passes. Only a facility that is connected on the direction side of the route from the upper starting position is extracted as a facility that is connected to a section on the traveling direction side of the vehicle on the route that constitutes the expressway. . The navigation device according to claim 4,
The extracted facility information list display unit includes: a first route that is a route to the facility among the facilities searched by the facility search unit; and the facility that configures the same expressway as a route to which the facility is connected. A search is made for a second route that is a route to the nearest point of the facility on the route that goes in the opposite direction to the connected route, and the expressway is configured with a facility in which the first route is shorter than the second route. A facility that is connected to a section on the traveling direction side of the vehicle on the route to be routed, and a facility on which the second route is shorter than the first route is located on the traveling direction side of the vehicle on the route that constitutes the expressway. A navigation device that is not extracted as a facility connected to a section. The navigation device according to claim 4,
The extracted facility information list display unit displays the route from the first point rather than the first point which is a point around the facility on the route connected to the facility among the facilities searched by the facility search unit. The facility where the second point, which is the point that has advanced in the direction of the route, is extracted as a facility that is connected to the section on the traveling direction side of the car on the route that constitutes the expressway. The facility in which the first point is larger than the current location than the second point is not extracted as a facility that is connected to a section on the traveling direction side of the vehicle on the route that constitutes the expressway. A navigation device. The navigation device according to claim 4,
It has a route guidance unit that searches for a route to the destination selected by the user and guides the traveling along the route,
The extracted facility information list display unit displays the route from the first point rather than the first point which is a point around the facility on the route connected to the facility among the facilities searched by the facility search unit. The second point, which is a point that has advanced in the direction of the route, is a facility that has a greater distance from the current position and a smaller distance from the destination. And the first point is larger than the second point from the current position, or the first point is farther from the destination than the second point. A navigation apparatus characterized in that a smaller facility is not extracted as a facility that is connected to a section on the traveling direction side of the automobile on a route that constitutes an expressway. The navigation device according to claim 4,
The navigation apparatus characterized in that the facilities attached to the expressway are a service area and a parking area. A computer program that is read and executed by a computer installed in an automobile,
The computer,
The facility name indicating the name of the corresponding facility provided for each facility attached to the expressway, the location of the facility indicating the location of the corresponding facility, the upstream route and the downward route constituting the expressway A facility information storage unit that stores facility information in which each route is a route and a route to which the corresponding facility is connected is registered.
A current position calculating unit for calculating a current position of the automobile;
A facility search unit that searches for facilities that match the search conditions specified by the user based on the facility information;
For each facility searched by the facility search unit, the direction of the area or point to which the route to which the facility is connected, viewed from the current position calculated by the current position calculation unit, is calculated as the direction of the facility. A direction calculation unit;
A search facility that displays a list of information including the facility name registered in the facility information corresponding to the facility and the direction direction calculated by the direction direction calculation unit for the facility for each facility searched by the facility search unit A computer program that functions as an information list display unit. A computer program that is read and executed by a computer installed in an automobile,
The computer,
The facility name indicating the name of the corresponding facility provided for each facility attached to the expressway, the location of the facility indicating the location of the corresponding facility, the upstream route and the downward route constituting the expressway A facility information storage unit that stores facility information in which each route is a route and a route to which the corresponding facility is connected is registered.
A current position calculating unit for calculating a current position of the automobile;
A facility search unit that searches for facilities that match the search conditions specified by the user based on the facility information;
Based on the current position calculated by the current position calculation unit and the facility position registered in the facility information among the facilities searched by the facility search unit, the vehicle traveling direction side of the route constituting the highway The facility connected to the section is extracted, and the extracted facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility extracted by the facility extracting unit is displayed. A computer program that functions as a facility information list display unit. A computer program according to claim 16, comprising:
A search facility information list display unit that displays a list of search facility information that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit. Function as
The extracted facility information list display unit is configured such that when the search facility information list display unit is displaying the search facility information list and the user is instructed to narrow down the facility according to the traveling direction of the facility, the extracted facility information list display unit A computer program for displaying an information list. A facility search method for searching for facilities in a navigation device mounted on an automobile,
The navigation device calculates a current position of the vehicle;
The navigation device is provided corresponding to each facility attached to the expressway, the facility name indicating the name of the corresponding facility, the facility position indicating the position of the corresponding facility, and the upstream direction constituting the expressway A facility search step for searching for a facility that matches a search condition designated by the user, based on the registered facility information with the route connected to the corresponding facility as a route and a route in the downward direction, respectively,
For each facility searched in the facility search step by the navigation device, the direction of the area or point to which the route to which the facility is connected, viewed from the calculated current position, is calculated as the direction of the facility. A calculation step;
A list of information including the facility name registered in the facility information corresponding to the facility and the direction direction calculated in the direction direction calculating step for the facility of each facility searched in the facility search step by the navigation device And a search facility information list display step for displaying the facility search method. A facility search method for searching for facilities in a navigation device mounted on an automobile,
The navigation device calculates a current position of the vehicle;
The navigation device is provided corresponding to each facility attached to the expressway, the facility name indicating the name of the corresponding facility, the facility position indicating the position of the corresponding facility, and the upstream direction constituting the expressway A facility search step for searching for a facility that matches a search condition designated by the user, based on the registered facility information with the route connected to the corresponding facility as a route and a route in the downward direction, respectively,
Based on the current position calculation and the facility position registered in the facility information among the facilities searched by the facility search step, the navigation device is on the traveling direction side of the vehicle on the route constituting the highway. An extraction facility that extracts a facility connected to a section and displays an extracted facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility extracted by the facility extraction unit A facility search method comprising: an information list display step. The facility search method according to claim 19,
A search facility information list display step in which the navigation device displays a search facility information list that is a list of information including the facility name registered in the facility information corresponding to the facility of each facility searched by the facility search unit; Have
The extracted facility information list display step is executed in the search facility information list display step when the user is instructed to narrow down according to the traveling direction of the facility when the search facility information list is displayed. A facility search method characterized by