JP2011174748A - Device, method and program for map display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique capable of recognizing, in a real field of vision, the direction where a map display object is located in relation to the current position. <P>SOLUTION: This device for map display includes: a stopping state acquiring means, which acquires a stopping position of a vehicle which stops and the direction of the vehicle at the stopping position; a current position acquiring means, which acquires the current position; a map information acquiring means which acquires map information; and a map display means, which displays a map, based on map information, and displays the stopping position, the vehicle direction and the current position in the map. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for displaying a map.

  As a conventional technique, a technique has been proposed in which a mobile terminal acquires map information of a surrounding area and route information to a destination from an in-vehicle navigation device and displays them (see Patent Document 1).

JP 2008-102047 A

However, even if the destination is displayed on the map on the mobile device, the direction of the destination can be recognized on the map, but the destination is recognized in the user's actual view. There was a problem that could not be done. For example, even if the destination is displayed on the surrounding map and it can be recognized that the destination is north of the current position, it cannot be recognized whether the user is actually facing north or south. For example, it cannot be recognized whether the destination is in front of the user's field of view or behind.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a technique that allows a direction in which a map display object is positioned relative to the current position to be recognized in an actual field of view.

  In order to achieve the above object, the map display device of the present invention acquires a stop position of a stopped vehicle, a vehicle direction at the stop position, a current position, and map information. Then, a map is displayed based on the map information, and the stop position, the vehicle direction, and the current position are displayed on the map. In order to display the current position on the map and the vehicle direction of the stopped vehicle, it is possible to determine in what direction the map display objects such as facilities, intersections and roads displayed on the map are located with respect to the current position. In the map, the vehicle direction can be recognized as a reference. That is, in the map, the direction in which the map display object is located with respect to the current position can be recognized as the “relative direction” with respect to the vehicle direction. On the other hand, since the vehicle is large enough to be visually recognized and has a strong directionality, the user can easily grasp the actual vehicle direction of the stopped vehicle in the field of view. Therefore, by applying the “relative direction” recognized in the map with reference to the vehicle direction in the actual view, the direction in which the map display object is located with respect to the current position in the actual view can be recognized. For example, if it can be recognized on the map that the “relative direction” is the opposite direction of the vehicle direction, it can be recognized that the map display object is located in the opposite direction of the vehicle direction captured in the real field of view. Further, by displaying the stop position on the map, it is possible to recognize how far the map display object is from the stop position of the stopped vehicle.

  Here, the stop state acquisition means only needs to be able to acquire the stop position and the vehicle direction of the stopped vehicle, detect the stop position and the vehicle direction of the vehicle in another device other than the map display device, and The detection result may be acquired by communication or the like. In this case, the map display device does not need to include hardware for detecting the stop position and the vehicle direction of the vehicle. On the other hand, if the map display device detects the stop position and the vehicle direction of the vehicle, it is not necessary to communicate with other devices. The vehicle may be any vehicle that can acquire the stop position and the vehicle direction, and the type of the vehicle is not particularly limited.

  The current position acquisition means only needs to acquire the position where the map display device currently exists, and it is preferable to acquire the current position in a time period and update the display of the current position in the map in a time period. Thus, the latest current position can be recognized. The map information acquired by the map information acquisition means may be any map information that can display the stop position, the vehicle direction, and the current position on the map based on the map information. For example, map information about the map area including the stop position and the current position is generated in a device other than the map display device, and the generated map information is acquired by the map information acquisition means by communication or the like. May be. Thereby, the recording medium for the map display device to store the map information can be made small.

  Further, by displaying the stop position and the current position in different manners on the map, the stop position and the current position can be recognized without confusion. For example, markers may be displayed at positions corresponding to the stop position and the current position on the map, and the shape and display color of the markers may be different from each other. The display indicating the stop position and the current position is not limited to the marker, and the current position may be represented by displaying the map so that the current position is at the center of the map, for example. Furthermore, it is desirable that the stop state acquisition unit acquires the vehicle direction and the stop position from an in-vehicle terminal provided in the vehicle. According to the in-vehicle terminal, the stop position and the vehicle direction of the vehicle can be detected in the vehicle, so that the accurate stop position and the vehicle direction can be acquired.

  Furthermore, as a preferable configuration of the present invention, there is a configuration in which a route from a stop position to a destination is displayed on a map. According to such a configuration, it is possible to easily recognize in which direction the route is directed with reference to the vehicle direction captured by the user in the real field of view. Moreover, when displaying the route from the stop position to the destination on the map, it is more preferable that the route acquisition means acquires the route from the stop position to the destination from the in-vehicle terminal. In this case, since the route search is performed by the in-vehicle terminal, it is not necessary to provide route search means in the map display device. Since the means for heading to the destination after stopping the vehicle is generally walking, it is desirable to display the walking route from the stop position to the destination. Of course, not only walking routes but also routes using public transportation may be displayed. The specific means for the route acquisition means to acquire the route from the in-vehicle terminal is not particularly limited, and may be, for example, via wired communication or wireless communication, or via a portable recording medium. Furthermore, when the route acquisition unit acquires the route from the in-vehicle terminal, the map information acquisition unit may acquire the map information from the in-vehicle terminal.

  Furthermore, as a preferable configuration of the present invention, there is a configuration in which a route from the current position to the destination is displayed on the map. Even in such a configuration, it is possible to easily recognize in which direction the route is directed with reference to the vehicle direction captured by the user in the real field of view. For example, the map display device requests a route from the current position to the destination to an external server or the like, and as a response, the route acquisition means acquires the route from the current position to the destination.

  Furthermore, the method of displaying a map as in the present invention can also be applied as a program or method. In addition, the above-described device, program, and method may be realized as a single device or may be realized by using components shared with each part of the vehicle, and include various aspects. It is a waste. For example, it is possible to provide a navigation device, a method, and a program that include the above devices. Further, some changes may be made as appropriate, such as a part of software and a part of hardware. Furthermore, the invention is also established as a recording medium for a program for controlling the apparatus. Of course, the software recording medium may be a magnetic recording medium, a magneto-optical recording medium, or any recording medium to be developed in the future.

It is a block diagram of a navigation system. It is a flowchart which shows a guidance process (vehicle-mounted terminal). It is a flowchart which shows a guidance process (mobile terminal). It is a figure which shows a map.

Here, embodiments of the present invention will be described in the following order.
(1) Configuration of navigation system:
(1-1) Configuration of in-vehicle terminal:
(1-2) Configuration of mobile terminal:
(2) Guidance processing:
(3) Other embodiments:

(1) Configuration of navigation system:
FIG. 1 is a block diagram showing a configuration of a navigation system according to one embodiment of the present invention. In the present embodiment, the navigation system 1 includes a mobile terminal 10 and an in-vehicle terminal 20.

(1-1) Configuration of in-vehicle terminal:
The in-vehicle terminal 20 includes a control unit 21 including a CPU, a RAM, a ROM, and the like, a recording medium 22, and a communication unit 23. The control unit 21 executes a program stored in the recording medium 22 and the ROM. The car navigation program 200 is executed as one of the programs.

  In the present embodiment, the vehicle is provided with a GPS receiver 41, a vehicle speed sensor 42, a gyro sensor 43, and a user I / F unit 44 in order to realize the function of the car navigation program 200. The GPS receiver 41 receives radio waves from GPS satellites and outputs a signal for calculating the current position of the vehicle to the controller 21 via an interface (not shown). The vehicle speed sensor 42 outputs a signal corresponding to the rotational speed of the wheels included in the vehicle to the control unit 21. The gyro sensor 43 detects angular acceleration for turning in the horizontal plane of the vehicle, and outputs a signal corresponding to the direction of the vehicle to the control unit 21. The control unit 21 specifies the current position of the vehicle and the front of the vehicle (the direction in which the headlight or the like is directed) based on output signals from the GPS receiving unit 41, the vehicle speed sensor 42, the gyro sensor 43, and the like and map information 22a described later. . If the direction in which the vehicle has moved is specified based on the output signal from the GPS receiving unit 41 during the period in which the vehicle is traveling forward, the control unit 21 sets the direction in which the front of the vehicle is directed to, for example, the north as a reference. It can be specified by the surrounding angle. Once the direction in which the front of the vehicle faces is specified, the control unit 21 can thereafter obtain the direction in which the front of the vehicle faces based on the output signal of the gyro sensor 43.

  The communication unit 23 includes a circuit that communicates with the mobile terminal 10, and the control unit 21 transmits stop state information 22 b, walking route information 22 d, and walking map information 22 e to the mobile terminal 10 via the communication unit 23. The user I / F unit 44 is an interface unit for providing various kinds of information to the user or inputting user instructions, and includes a touch panel display, a speaker, and the like (not shown). In the present embodiment, the communication unit 23 performs wireless communication via infrared rays or radio waves.

  The recording medium 22 stores map information 22a in advance. The recording medium 22 can store stop state information 22b, travel route information 22c, walking route information 22d, and walking map information 22e. The map information 22a has a vehicle layer and a walking layer. The vehicle layer includes node data indicating nodes set on the road on which the vehicle travels, shape interpolation point data for specifying the shape of the road between the nodes, link data indicating connection between nodes, and the like. It is. In the walking layer, node data indicating nodes set on the walking path on which the pedestrian walks, shape interpolation point data for specifying the shape of the walking path between the nodes, link data indicating connection between nodes, etc. Is included. In addition, the vehicle layer node and the walking layer node associated with a common facility (such as a parking lot) where both the vehicle driving path and the walking path are commonly connected are assumed to be connectable to each other. Attached.

  The stop state information 22b includes vehicle direction information for specifying the vehicle direction of the stopped vehicle stopped at the stop position, stop position information for specifying the stop position of the stopped vehicle, and marker designation information. A stopped vehicle refers to a vehicle that includes the in-vehicle terminal 20 and that is stopped. The vehicle direction indicates the front of the stopped vehicle, and is specified by output signals from the GPS receiver 41, the vehicle speed sensor 42, the gyro sensor 43, and the like. The stop position refers to the position of the stopped vehicle. For example, in the stop position information, the stop position is specified by longitude and latitude, and in the vehicle direction information, the vehicle direction is specified by a clockwise angle with north being 0 degree. The marker designation information is information for designating the display color of the stopped vehicle marker for schematically displaying the stopped vehicle on the display of the mobile terminal 10, and the in-vehicle terminal 20 displays the traveling position and the traveling direction of the vehicle on the map. The display color different from the display color of the traveling vehicle marker used in order to do is designated.

  The travel route information 22c and the walking route information 22d are data generated when the control unit 21 performs a route search. Therefore, when the route search is not performed, the traveling route information 22c and the walking route information 22d are not generated. This route search is performed when a user who is in the vehicle sets a destination in the in-vehicle terminal 20 via the user I / F unit 44. In the travel route information 22c, the nodes of the vehicle layer that pass through from the current position of the vehicle to the planned stop position are specified in association with each other in the order of passage. In the walking route information 22d, the nodes of the walking layer that are routed from the planned stop position to the destination are specified in association with each other in the order of passage. The walking route information 22d also stores position information indicating the longitude and latitude of the destination. The planned stop position is a node of the vehicle layer corresponding to the parking lot. The planned stop position is a position that is planned to be a stop position on the route obtained by the route search, and the vehicle may not actually stop at the planned stop position. In the present embodiment, when the vehicle actually stops, the route search for the walking route from the actual stop position to the destination is performed again, and the result is stored in the walking route information 22d. In this specification, unless otherwise indicated, the stop position refers to a stop position where the vehicle is actually stopped.

The walking map information 22e is information for displaying a map of a map area including the stop position and the destination. When the route search to the destination is performed in advance, the walking map information 22e includes data relating to the map area including the stop position and the destination among the node data constituting the walking layer of the map information 22a. Is stored. In this embodiment, the map area including the stop position and the destination is added to a rectangular area having a line segment connecting the stop position and the destination as a diagonal line and a rectangular frame area having a predetermined width surrounding the outside of the rectangular area. Corresponding to the area.
On the other hand, when the route search to the destination is not performed in advance, the walking map information 22e stores data related to the map area including the stop position among the node data constituting the walking layer of the map information 22a. Is done. In the present embodiment, the map area including the stop position corresponds to a rectangular area having the stop position as the center of gravity.

  The car navigation program 200 includes a car navigation unit 210, a stop state information generation unit 220, and a data transmission unit 230. The car navigation unit 210 has a function of searching for a route from the current position of the vehicle to the destination and a function of guiding a route from the current position of the vehicle to the planned stop position based on the travel route information 22c obtained by the route search. Are program modules for causing the control unit 21 to execute the above. That is, by the function of the car navigation unit 210, the control unit 21 receives the setting of the destination via the user I / F unit 44, and from the current position of the vehicle specified from the output signal of the GPS receiving unit 41 to the destination Route search is performed. In this route search, the parking node closest to the destination is first set as the planned stop position, and the route from the current position of the vehicle to the planned stop position is determined by a known method such as the Dijkstra method using the node of the vehicle layer. The route is searched, and the result is stored in the travel route information 22c. Next, a route from the planned stop position to the destination is searched by a known method using the nodes of the walking layer, and the result is stored in the walking route information 22d. Further, by the function of the car navigation unit 210, the control unit 21 performs a new route search of the walking route from the stop position where the vehicle is actually stopped to the destination when the vehicle is actually stopped, and the result is obtained. Stored in the walking route information 22d.

With the function of the car navigation unit 210, the control unit 21 displays route guidance based on the travel route information 22 c on the touch panel display of the user I / F unit 44. Here, a map is displayed on the touch panel display, and a route based on the travel route information 22c is displayed on the map. Further, a traveling vehicle marker indicating the traveling position and traveling direction of the vehicle identified from the output signals of the GPS receiver 41, the vehicle speed sensor 42, and the gyro sensor 43 is displayed on the map. In the present embodiment, the traveling vehicle marker has an arrow shape, and the display direction of the traveling vehicle marker is set so that the head of the arrow points to the front (traveling direction) of the vehicle.
On the other hand, when the user does not perform an operation for instructing the route search to the destination, the control unit 21 does not perform the route search by the function of the car navigation unit 210. In this case, the travel route information 22c and the walking route information 22d are not generated, and the route based on the travel route information 22c is not displayed on the touch panel display.

  The stop state information generation unit 220 is a program module for generating stop state information 22b when the vehicle stops. That is, when the control unit 21 detects the stop of the vehicle based on the parking brake, the state of the shift lever, and the like by the function of the stop state information generation unit 220, the control unit 21 determines the front direction and the current position of the actual vehicle at the time of stop, respectively. It acquires as a vehicle direction and a stop position, and stores the vehicle direction information and stop position information which specify these in the stop state information 22b. Note that the stop position acquired here is the actual position of the vehicle, not the planned stop position. Then, the display color of the traveling vehicle marker is acquired, and marker designation information for designating a display color different from the display color of the traveling vehicle marker is stored in the stop state information 22b. Furthermore, the control part 21 produces | generates the walking map information 22e, when a vehicle stops with the function of the stop state information generation part 220. FIG.

  The data transmission unit 230 is a program module for causing the control unit 21 to execute a function of transmitting the stop state information 22b, the walking route information 22d, and the walking map information 22e to the mobile terminal 10 via the communication unit 23. That is, when the control unit 21 detects the stop of the vehicle by the function of the data transmission unit 230, the control unit 21 generates the walking map information 22e based on the map information 22a. Here, the control unit 21 generates walking map information 22e for different map areas depending on whether or not a route search is being performed. That is, when the walking route information 22d is stored in advance in the recording medium 22 by the route search, by extracting node data and the like regarding the map region including the stop position and the destination from the walking layer of the map information 22a, The walking map information 22e is generated. On the other hand, when the route search is not performed, the walking map information 22e is generated by extracting node data and the like related to the map area having the stop position as the center of gravity from the walking layer of the map information 22a.

(1-2) Configuration of mobile terminal:
The mobile terminal 10 includes a control unit 11 including a CPU, RAM, ROM, and the like, and a recording medium 12, and the control unit 11 executes a program stored in the recording medium 12 and the ROM. The walking navigation program 100 is executed as one of the programs. The walking navigation program 100 is a program that causes the control unit 11 to execute a function of displaying a stop position, a stop direction, a current position, and a destination on a map.

  The mobile terminal 10 includes a GPS receiving unit 13, a user I / F unit 14, and a communication unit 15. The GPS receiving unit 13 receives radio waves from GPS satellites and outputs a signal for calculating the current position of the mobile terminal 10 to the control unit 11 via an interface (not shown). The control unit 11 specifies the current position of the mobile terminal 10 based on the output signal of the GPS receiving unit 13.

  The user I / F unit 14 is an interface unit for providing various types of information to the user or inputting user instructions, and includes a display, a speaker, an input button, and the like (not shown). The control unit 11 outputs a control signal to the user I / F unit 14 to display an arbitrary image on the display, and outputs an arbitrary sound from the speaker. In addition, the control unit 11 receives a user instruction based on the output signal of the user I / F unit 14. The communication unit 15 includes a circuit that performs wireless communication with the in-vehicle terminal 20. The control unit 11 acquires stop state information 22b and walking map information 22e via the communication unit 15. Furthermore, when the route search is performed in the in-vehicle terminal 20, the control unit 11 also acquires the walking route information 22 d via the communication unit 15.

  The walking navigation program 100 includes a stop state acquisition unit 110, a current position acquisition unit 120, a map information acquisition unit 130, a route acquisition unit 140, and a map display unit 150. The stop state acquisition unit 110 is a program module that causes the control unit 11 to execute a function of acquiring a stop position of a stopped vehicle and a vehicle direction at the stop position. That is, the control unit 11 acquires the stop state information 22b from the in-vehicle terminal 20 via the communication unit 15 by the function of the stop state acquisition unit 110. In the present embodiment, since the vehicle stop position and the vehicle direction are detected by the in-vehicle terminal 20 or the like provided in the vehicle, the portable terminal 10 does not have to include hardware for detecting these. In addition, since the vehicle stop position and the vehicle direction are detected by the vehicle-mounted terminal 20 or the like provided in the vehicle, the accurate stop position and vehicle direction can be acquired.

  The current position acquisition unit 120 is a program module that causes the control unit 11 to execute a function of acquiring the current position. That is, the control unit 11 specifies the current position of the mobile terminal 10 based on the output signal of the GPS receiving unit 13 by the function of the current position acquisition unit 120.

  The map information acquisition unit 130 is a program module for causing the control unit 11 to execute a function of acquiring the walking map information 22e. That is, the control unit 11 acquires the walking map information 22 e from the in-vehicle terminal 20 through the communication unit 15 by the function of the map information acquisition unit 130. In the present embodiment, the in-vehicle terminal 20 stores the entire map information 20a, and the in-vehicle terminal 20 generates walking map information 22e in which node data corresponding to the map area near the stop position is extracted from the map information 20a. The portable terminal 10 has acquired the walking map information 22e. Thereby, the recording medium 12 for the portable terminal 10 to store the walking map information 22e can be made small.

  The route acquisition unit 140 is a program module for causing the control unit 11 to execute a function of acquiring the walking route information 22d indicating the route from the stop position to the destination from the in-vehicle terminal 20. That is, when the route search is performed in the in-vehicle terminal 20, the control unit 11 acquires the walking route information 22 d from the in-vehicle terminal 20 through the communication unit 15 by the function of the route acquisition unit 140. By acquiring the walking route information 22d from the in-vehicle terminal 20, the portable terminal 10 does not have to include a route searching means. In addition, the in-vehicle terminal 20 can collectively perform a route search from the current position of the vehicle to the destination via the stop position by the function of the car navigation program 200, and the control unit 11 can be controlled by the function of the route acquisition unit 140. As a result of the route search, the walking route information 22d for specifying the route from the stop position to the destination can be acquired.

  The map display unit 150 is a program module for causing the control unit 11 to execute a function of displaying a map on the display based on the walking map information 22e. The map display unit 150 is a program module for causing the control unit 11 to execute a function of displaying a stop position and a vehicle direction on the map based on the stop state information 22b. Depending on whether or not a route search is performed in the in-vehicle terminal 20, the content displayed on the display by the control unit 11 varies depending on the function of the map display unit 150.

  First, the case where route search is not performed in the in-vehicle terminal 20 will be described. When the route search is not performed in the in-vehicle terminal 20, the control unit 11 displays a map on the display based on the walking map information 22e by the function of the map display unit 150. Display the position marker. The stop vehicle marker and the current position marker have different shapes. When the route search is not performed in the in-vehicle terminal 20, a map with the stop position as the center of gravity is displayed based on the walking map information 22e. In the map, the current position marker is displayed at a position corresponding to the current position specified by the control unit 11 based on the output signal from the GPS receiving unit 13.

  The stop vehicle marker is displayed on the map at a position corresponding to the longitude and latitude indicated by the stop position information of the stop state information 22b. The stop vehicle marker is an arrow having the same shape as the traveling vehicle marker used by the in-vehicle terminal 20 to display the traveling position and traveling direction of the vehicle, and has a different shape from the current position marker. However, the display color of the stop vehicle marker is different from the display color specified by the marker specification information, that is, the display color of the traveling vehicle marker used by the in-vehicle terminal 20 to display the traveling position and traveling direction of the vehicle. Is done. The display direction of the stop vehicle marker is set so that the head of the arrow points to the front of the vehicle. This display direction is an angle indicated by the vehicle direction information of the stop state information 22a. In the present embodiment, the map display unit 150 always displays a map so that the upper direction of the display points to the north. Therefore, the stop vehicle marker has a display direction in which the stop vehicle marker is rotated clockwise by an angle indicated by the vehicle direction information from a state in which the head of the arrow is directed upward in the display.

  The control unit 11 updates the display position of the current position marker on the map periodically based on the output signal from the GPS receiving unit 13 by the function of the map display unit 150. That is, since the current position detected by the GPS receiver 13 of the mobile terminal 10 changes when the user walks with the mobile terminal 10, the current position marker on the map follows the change in the current position. Update the display position of. Thereby, the user can recognize the latest current position. On the other hand, the stop vehicle marker, the destination marker, the position indicated by the route on the map, and the display direction of the stop vehicle marker on the map are constant.

  Next, a case where a route search is performed by the in-vehicle terminal 20 will be described. Even when a route search is performed on the in-vehicle terminal 20, the control unit 11 causes the map display unit 150 to display a map on the display based on the walking map information 22e. Display the position marker. Also in this case, the stop vehicle marker and the current position marker have different shapes. Further, when a route search is performed on the in-vehicle terminal 20, the control unit 11 causes the map display unit 150 to display a destination marker and a walking route on the map. Further, when the route search is performed by the in-vehicle terminal 20, since the walking map information 22e is generated for the map area including the stop position and the destination, a map including the stop position and the destination is generated. The map appears on the display. The destination marker is displayed on the map at a position corresponding to the longitude and latitude indicated by the destination position information included in the walking route information 22d. The destination marker has a different shape from the stop vehicle marker and the current position marker. Further, the function of the map display unit 150 causes the control unit 11 to display a walking route from the stop position to the destination on the map based on the walking route information 22d. Even when a route search is performed by the in-vehicle terminal 20, the display position of the current position marker on the map is updated periodically based on the output signal from the GPS receiver 13.

  According to the above configuration, since the stop vehicle marker is displayed on the map displayed by the mobile terminal 10, in which direction ("relative direction") the destination marker of the map is based on the vehicle direction with respect to the current position marker. Whether it is located can be recognized on a map. Note that a direction based on the vehicle direction is referred to as a “relative direction”. In general, the stopped vehicle is large enough to be visually recognized and has a strong directionality, so that the user can easily grasp the actual vehicle direction of the stopped vehicle in the field of view. Therefore, by applying the `` relative direction '' recognized on the map based on the vehicle direction that the user actually captured in the field of view, it is possible to determine in which direction the destination is located in the actual field of view relative to the current position. It can be easily recognized. For example, if the map shows that the direction in which the destination is located relative to the current position is the opposite direction of the direction in which the head of the arrow of the stop vehicle marker faces, that is, the “relative direction” is the opposite direction, It can be recognized that the destination is located in the opposite direction to the vehicle direction captured in the field of view, and it can be recognized that it is only necessary to walk toward the rear of the stopped vehicle without seeing the walking route. Further, by displaying the stop vehicle marker on the map, it is possible to recognize how far the destination is from the stop position where the vehicle is stopped.

  In particular, when a route search is performed on the in-vehicle terminal 20, a destination marker is displayed on the map, so that the "relative direction" where the destination is located relative to the current position is clearly recognized on the map. can do. Furthermore, since the “relative direction” to which the walking route is directed can be recognized on the map, the user can recognize the direction to which the walking route is directed in the actual field of view. The stop vehicle marker has the same shape and the same display color as the traveling vehicle marker used by the in-vehicle terminal 20 to display the traveling position and the traveling direction of the vehicle. Therefore, these markers indicate the same target (vehicle). It is possible to recognize the vehicle in the running state and the vehicle in the stopped state without confusion. Moreover, since the stop vehicle marker, the current position marker, and the destination marker have different shapes and are displayed in different modes, they can be recognized without being confused.

(2) Guidance processing:
Next, a flow of guidance processing executed by the navigation system 1 will be described. 2 is a flowchart of processing executed by the in-vehicle terminal 20 in the guidance processing, and FIG. 3 is a flowchart of processing executed by the mobile terminal 10 in the guidance processing. FIG. 4 shows display contents displayed on the display by the mobile terminal 10 in the present embodiment. Here, the process which parks a vehicle in the parking lot P of an urban area, and performs the guidance for going to the restaurant R as a destination on foot from there is demonstrated as an Example. That is, the route search for the restaurant R as the destination is performed in the in-vehicle terminal 20 in advance, and the travel route from the current position of the vehicle to the parking lot P as the planned stop position is stored in the travel route information 22c. The walking route W from the parking lot P as the planned stop position to the restaurant R as the destination is stored in the walking route information 22d.

  In step S100, the control unit 21 of the in-vehicle terminal 20 detects the stop of the vehicle by the function of the stop state information generation unit 220. Here, it is assumed that it is detected that the vehicle is parked in the parking lot P in the urban area. When the stop of the vehicle is detected, in step S110, the control unit 21 of the in-vehicle terminal 20 generates the stop state information 22b by the function of the stop state information generation unit 220. Moreover, in step S110, the control part 21 of the vehicle-mounted terminal 20 produces | generates the walk map information 22e by the function of the stop state information generation part 220. FIG. When a route search is not performed in the in-vehicle terminal 20, walking map information 22e is generated for a map area with the stop position as the center of gravity. In this embodiment, since the route search is performed by the in-vehicle terminal 20, the walking map information 22e for the map area including the parking lot P in the urban area as the stop position and the restaurant R as the destination is generated. .

  In step S <b> 120, the control unit 21 of the in-vehicle terminal 20 transmits the stop state information 22 b and the walking map information 22 e to the mobile terminal 10 by the function of the data transmission unit 230. When the route search is performed by the in-vehicle terminal 20, the walking route information 22d is transmitted to the portable terminal 10 together with the stop state information 22b and the walking map information 22e. Note that data and objects handled only when a route search is performed in the in-vehicle terminal 20 are shown in parentheses in FIGS. In this embodiment, since the route search is performed by the in-vehicle terminal 20, the walking route information 22d indicating the walking route W from the parking lot P in the urban area as the stop position to the restaurant R as the destination is also a portable terminal. 10 is transmitted. In addition, since the planned stop position searched by the route search performed in advance may be different from the stop position where the vehicle actually stopped, it is not the planned stop position but the stop position where the vehicle actually stopped to the destination. After searching for a new route of the walking route W, the walking route information 22d is transmitted to the mobile terminal 10. The process described above is a process executed in the in-vehicle terminal 20, and the process described below is a process executed in the mobile terminal 10.

  In step S130, the control unit 11 of the mobile terminal 10 causes the display to display a map based on the walking map information 22e by the function of the map display unit 150. When the route search is not performed in the in-vehicle terminal 20, a map with the stop position as the center of gravity is displayed based on the walking map information 22e. In this embodiment, since the route search is performed by the in-vehicle terminal 20, a map including the parking lot P in the urban area as the stop position and the restaurant R as the destination is displayed based on the walking map information 22e. .

  In step S140, the control unit 11 of the mobile terminal 10 causes the map display unit 150 to display the stop vehicle marker T (arrow) on the map based on the stop state information 22b. The display position of the stop vehicle marker T on the map is a position corresponding to the stop position information of the stop state information 22a, and the display direction of the stop vehicle marker T is an angle indicated by the vehicle direction information of the stop state information 22a. When the route search is performed in the in-vehicle terminal 20, the control unit 11 of the mobile terminal 10 uses the function of the map display unit 150 to cause the walking route W (thick line) and the purpose based on the walking route information 22d in step S140. The ground marker D (square) is displayed on the map. In this embodiment, the stop vehicle marker T is displayed at a position corresponding to the parking lot P on the map, and the display direction of the stop vehicle marker T is the direction corresponding to the direction of the vehicle parked at the parking lot P. Further, on the map, the destination marker D indicating the restaurant R and the walking route W from the parking lot P to the restaurant R are displayed based on the walking route information 22d.

  In step S150, the control unit 11 of the mobile terminal 10 causes the map display unit 150 to display the current position marker C (circle) on the map based on the output signal from the GPS receiving unit 13. The process of step S150 is periodically executed while the mobile terminal 10 displays a map. That is, since the current position detected by the GPS receiver 13 of the mobile terminal 10 changes when the user walks with the mobile terminal 10, the current position marker on the map follows the change in the current position. The process of updating the display position of C is repeated.

  As shown in FIG. 4, the tip of the arrow of the stopped vehicle marker T displayed on the parking lot P faces northwest, and the current position marker C is also displayed on the parking lot P. The restaurant R as the destination is located in the southeast of the current position marker C. In such a situation, the user at the parking lot P has the restaurant R at a position in the opposite direction (southeast) from the current position marker C to the vehicle direction (northwest) on the map displayed on the display of the mobile terminal 10. It can be recognized that it exists. That is, it can be recognized that the “relative direction” from the current position of the restaurant R is the opposite direction (180 degrees) of the vehicle direction. Next, the user grasps the vehicle direction of the actually stopped vehicle parked in the parking lot P in the field of view. Then, the “relative direction” recognized on the map is applied based on the vehicle direction of the stopped vehicle in the actual field of view. Here, since the opposite direction as the “relative direction” is applied based on the vehicle direction of the stopped vehicle in the real field of view, the restaurant R is located behind the actual stopped vehicle (direction of the backlight, etc.). It can be recognized that. In the walking route W, the first direction from the stop position is east, and the “relative direction” is the clockwise direction of 135 degrees. The user can recognize that it is only necessary to take a course on a walking path heading in the direction of 135 degrees clockwise with reference to the vehicle direction of the actual stopped vehicle parked in the parking lot P.

(3) Other embodiments:
In the embodiment, the mobile terminal 10 acquires the stop state information 22b, the walking route information 22d, and the walking map information 22e from the in-vehicle terminal 20, but the walking route information 22d and the walking map information 22e are other devices. May be obtained from For example, when the mobile terminal 10 includes a communication circuit that can be connected to the mobile terminal communication network, and the mobile terminal 10 accesses a server connected to the mobile terminal communication network, the walking route information 22d and the walking map information 22e are transmitted from the server. And may be acquired. That is, after parking the vehicle, the mobile terminal 10 receives the designation of the destination, and requests the server to search for a route from the current position to the destination based on the output signal from the GPS receiver 41. In response to this, the server generates walking map information 22e including the current position and the destination, searches the walking path W from the current position to the destination, and generates walking path information 22d. Then, the server transmits the walking map information 22e and the walking route information 22d to the mobile terminal 10. If the walking map information 22e and the walking route information 22d are obtained, the mobile terminal 10 can perform the same map display as in the above embodiment.

  In the embodiment, the map is displayed on the mobile terminal 10 after parking. However, if the in-vehicle terminal 20 (including the GPS receiving unit 41 and the gyro sensor 43) is detachable from the vehicle, the vehicle after parking is displayed. You may make it display the stop vehicle marker T on a map with the vehicle-mounted terminal 20 taken out from. That is, even after the in-vehicle terminal 20 is removed from the vehicle, the stop state information 22b is stored in the same manner as the portable terminal 10 if the stop state information 22b, the walking route information 22d, and the walking map information 22e are retained in the recording medium 22. Based on the walking path information 22d and the walking map information 22e, the stop vehicle marker T, the current position marker C, and the like can be displayed on the map. Also in this embodiment, since it is possible to easily recognize in which direction the destination is located in the real field of view with respect to the current position with reference to the vehicle direction of the stopped vehicle with good visibility, the stopped vehicle marker The indication of T is useful.

  In the above embodiment, the route search for the walking route W from the stop position is performed, but the route search using the public transportation may be performed. The specific means for the mobile terminal 10 to acquire the walking route information 22d is not limited to wireless communication, and may be, for example, via wired communication or via a portable recording medium. Furthermore, the present position is not limited to the stop position marker and the current position marker C indicating the stop position and the current position. For example, the current position may be represented by scrolling the map so that the current position is at the center of the map. Also in this case, the current position and the stop position are not confused.

  DESCRIPTION OF SYMBOLS 1 ... Navigation system, 10 ... Portable terminal, 11 ... Control part, 12 ... Recording medium, 13 ... GPS receiving part, 14 ... User I / F part, 15 ... Communication part, 20 ... In-vehicle terminal, 20a ... Map information, 21 ... Control unit, 22 ... Recording medium, 22a ... Map information, 22b ... Stop state information, 22c ... Running route information, 22d ... Walking route information, 22e ... Walking map information, 23 ... Communication unit, 41 ... GPS receiving unit, 42 ... vehicle speed sensor, 43 ... gyro sensor, 44 ... user I / F unit, 100 ... walking navigation program, 110 ... stop state acquisition unit, 120 ... current position acquisition unit, 130 ... map information acquisition unit, 140 ... route acquisition unit, 150 ... Map display unit, 200 ... Car navigation program, 210 ... Car navigation unit, 220 ... Stop state information generation unit, 230 ... Data transmission unit.

Claims (7)

Stop state acquisition means for acquiring the stop position of the stopped vehicle and the vehicle direction at the stop position;
Current position acquisition means for acquiring the current position;
Map information acquisition means for acquiring map information;
Map display means for displaying a map based on the map information, and displaying the stop position, the vehicle direction and the current position on the map;
A map display device comprising: The map display means displays the stop position and the current position in the map in different modes.
The map display device according to claim 1. The stop state acquisition means acquires the vehicle direction and the stop position from an in-vehicle terminal provided in the vehicle.
The map display apparatus in any one of Claim 1 or Claim 2. Comprising route acquisition means for acquiring a route from the stop position to the destination;
The map display means displays the route, the stop position, the vehicle direction, and the current position in the map;
The map display apparatus in any one of Claims 1-3. Comprising route acquisition means for acquiring a route from the current position to the destination;
The map display means displays the route, the stop position, the vehicle direction, and the current position in the map;
The map display apparatus in any one of Claims 1-3. A stop state acquisition step of acquiring a stop position of a stopped vehicle and a vehicle direction at the stop position;
A current position acquisition process for acquiring the current position;
A map information acquisition process for acquiring map information;
A map display step for displaying a map based on the map information and displaying the stop position, the vehicle direction, and the current position on the map;
Map display method including A stop state acquisition function for acquiring a stop position of a stopped vehicle and a vehicle direction at the stop position;
A current position acquisition function for acquiring the current position;
A map information acquisition function for acquiring map information;
A map display function for displaying a map based on the map information, and displaying the stop position, the vehicle direction, and the current position on the map;
A map display program that runs on a computer.

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