JP2010276454A - Navigation device, map display method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a navigation system 10 for reducing operations to be performed by a user to keep a recognizing positional relation between a current position and a target. <P>SOLUTION: This navigation device 20 includes a database 25 for storing link data and map data; a current position calculation part 24 for calculating the current position of a vehicle, a route search part 21 for searching for a route from a departure spot up to a destination spot, a route guidance part 22 for outputting a guidance image for performing guidance of a direction for the vehicle to proceed at the intersection when an intersection to be guided exists within a predetermined distance ahead of the current position of the vehicle in a guidance route designated by the user, and a display control part 23 which divides the screen region of a display 11 into two, displays in one region a north-up map which displays a car mark representing the current position of the vehicle, together with a map whose upside represents the north direction on the screen of the display 11, and displays on the other region the guidance image output from the route guidance part 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technology that is mounted on a moving body such as a vehicle and notifies a user of the current position of the vehicle by displaying the current position of the vehicle on a map.

  Patent Document 1 below includes a north-up display mode in which the current position of the vehicle is displayed on a map in which the upper part of the screen of the display device is in the north direction and a map in which the upper part of the screen of the display device is in the traveling direction of the vehicle Various display modes in the navigation device are disclosed, such as a front wide display mode in which the current position of the vehicle is displayed below the center of the screen.

JP 2002-98536 A

  By the way, people often recognize a map with the top facing north, and recognize the positional relationship between the current position and the target such as the destination point, the route to the destination point, etc., on the map with the top facing north. There are many cases to do. Therefore, if the user continues to look at the map based on the traveling direction of the vehicle, the positional relationship between the current position and the target may be lost.

  In particular, if you make a right or left turn at an intersection many times, or if you drive on a curved road, it will be difficult to continue to recognize the positional relationship between the current position and the destination point. The user may reconfirm the positional relationship between the current position and the target object by performing an operation such as reducing the scale or displaying the north-up map. Such a reconfirmation operation is troublesome for the user.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce operations by the user for maintaining recognition of the positional relationship between the current position and the target.

  In order to solve the above-mentioned problem, a first aspect of the present invention is a navigation device mounted on a vehicle, in which a database storing link data and map data, which are information related to a link indicating a road, and a current vehicle A current position calculating means for calculating a position and a traveling direction; a route searching means for searching for a route from the departure point to the destination point with reference to a database based on information indicating the departure point and the destination point received from the user; When there is an intersection to be guided within a predetermined distance ahead of the current position of the vehicle, using the route determined by the user among the routes searched by the route search means as a guidance route, the vehicle should travel at the intersection The route guidance means for outputting a guidance image for guiding the direction and the screen area of the display device are divided into two areas, one area A display that displays a north-up map displaying a car mark indicating the current position of the vehicle together with a map in which the upper part of the screen of the display device is in the north direction, and displaying a guidance image output from the route guidance means in the other area A navigation device comprising a control means is provided.

  A second aspect of the present invention is a navigation device mounted on a vehicle, and calculates a database for storing link data and map data, which are information related to a link indicating a road, and a current position and a traveling direction of the vehicle. Current position calculating means, link data in the database, and current position and traveling direction of the vehicle, and a right / left turn determining means for determining whether the vehicle has turned right or left at the intersection, and right / left turn determination Display control means for displaying a north-up map for displaying a car mark indicating the current position of the vehicle together with a map in which the upper part of the screen of the display device is in the north direction when it is determined by the means that the vehicle has turned right or left at the intersection. A navigation device is provided.

  According to the navigation device of the present invention, it is possible to reduce the user's operation for maintaining the recognition of the positional relationship between the current position and the target.

It is a system configuration figure showing an example of the composition of navigation system 10 in a 1st embodiment. It is a figure which shows an example of the structure of the link table 250 stored in the database 25. FIG. It is a conceptual diagram for demonstrating an example of the screen display by the display control part 23 of 1st Embodiment. It is a conceptual diagram for demonstrating an example of the screen display by the display control part 23 of 1st Embodiment. It is a flowchart which shows an example of operation | movement of the navigation apparatus 20 in 1st Embodiment. It is a system configuration figure showing an example of composition of navigation system 10 in a 2nd embodiment. It is a conceptual diagram for demonstrating an example of the screen display by the display control part 23 of 2nd Embodiment. It is a conceptual diagram for demonstrating the other example of the screen display by the display control part 23 of 2nd Embodiment. It is a flowchart which shows an example of operation | movement of the navigation apparatus 20 in 2nd Embodiment. 2 is a hardware configuration diagram illustrating an example of a computer 50 that realizes the function of the navigation device 20. FIG.

  First, a first embodiment of the present invention will be described.

  FIG. 1 is a system configuration diagram illustrating an example of a configuration of a navigation system 10 according to the first embodiment. The navigation system 10 includes a display device 11, an input device 12, a sensor 13, and a navigation device 20. The navigation device 20 includes a route search unit 21, a route guidance unit 22, a display control unit 23, a current position calculation unit 24, and a database 25.

  In the database 25, a link table including map information indicating roads, map data, and the like are stored in advance. In the link table, for example, as shown in FIG. 2, data relating to the link is stored as mesh data 251 for each predetermined map area. Each mesh data 251 includes a mesh ID 252 for identifying each mesh, link data 253 that is data relating to a link in the mesh, and the like.

  Each link data 253 is connected to a link ID 254 for identifying each link, a link start node coordinate 255, a link end node coordinate 256, a link road type 257, a link length 258, and a link start node. The start connection link 259 that is identification information of other links, the end connection link 260 that is identification information of other links connected to the end node of the link, and the like are stored.

  The sensor 13 is, for example, a GPS (Global Positioning System) receiver, an orientation sensor, a distance sensor, and the like. The GPS signal transmitted from the geodetic satellite, the traveling direction of the vehicle, the moving distance of the vehicle, the steering angle of the steering wheel, etc. Measure and supply the measurement information to the current position calculator 24.

  The current position calculation unit 24, for example, every time the vehicle on which the navigation device 20 is mounted moves, for example, a predetermined distance (for example, 10 m) based on the measurement information supplied from the sensor 13 and the link data stored in the database 25. The current position and traveling direction of the vehicle are calculated by map matching or the like, and information indicating the calculated current position and traveling direction of the vehicle is provided to the route searching unit 21, the route guiding unit 22, and the display control unit 23.

  The route search unit 21 receives link information from the user via the input device 12 such as a touch panel when the search information including the coordinates of the departure point, the destination point, and the waypoint, the search conditions, and the like is received from the user. , Based on the search information, the route from the departure point to the destination point through the waypoint is searched using an algorithm such as Dijkstra method, and the search result is displayed on the display device 11.

  When the route search unit 21 receives information specifying the searched route from the user via the input device 12, the route search unit 21 uses the route specified by the user as the guide route to the route guide unit 22 and the display control unit 23. send. Note that the route search unit 21 may perform route search using the current position of the vehicle as a departure point.

  When the route guidance unit 22 receives information indicating the guidance route from the route search unit 21, the route guidance unit 22 refers to the current vehicle position calculated by the current position calculation unit 24 and the link data stored in the database 25. It is determined whether or not there is a guide point that should guide the traveling direction within a predetermined distance ahead of the vehicle on the guidance route. When a guide point exists within a predetermined distance in front of the vehicle, the route guide unit 22 outputs a guide image for guiding the traveling direction of the vehicle at the guide point to the display control unit 23.

  The display control unit 23 acquires a map (for example, a front wide map, a north-up map, a heading-up map, etc.) in a mode instructed by the user via the input device 12 from the database 25 and is calculated by the current position calculation unit 24. It is displayed on the display device 11 together with a car mark indicating the current position of the vehicle that has been selected. Further, when receiving a guidance route from the route search unit 21, the display control unit 23 highlights a road corresponding to the guidance route on the map.

  In addition, when the display control unit 23 receives a guidance image from the route guidance unit 22, the display control unit 23 refers to the current display state of the display device 11 and determines whether or not the screen area is divided into two screen displays. judge. For example, as shown in FIG. 3A, when the display screen 30 of the display device 11 is not a two-screen display, the display control unit 23 currently displays the screen of the display device 11 on the display screen 30 of the display device 11. It is determined whether or not a north-up map that displays a car mark indicating the current position of the vehicle is displayed on a map with the upper part of the vehicle being in the north direction.

  For example, as shown in FIG. 3A, a car mark indicating the current position of the vehicle is displayed below the center of the screen together with a map in which the upper part of the screen of the display device 11 is in the traveling direction of the vehicle. When an image other than the north-up map such as the front wide map is displayed, the display control unit 23 divides the screen area of the display device 11 into two as shown in FIG. 3B, for example. The north-up map is displayed in the area 33, and the guide image output from the route guiding unit 22 is displayed in the other area 32.

  On the other hand, when the north-up map is currently displayed on the display device 11, the display control unit 23 divides the screen area of the display device 11 into two as shown in FIG. 3B, for example. The currently displayed north-up map is displayed on 33, and the guidance image output from the route guidance unit 22 is displayed on the other area 32.

  In addition, when the display device 11 performs a two-screen display when the guide image is received from the route guidance unit 22, the display control unit 23 determines whether or not the north-up map is displayed in one area. judge. For example, as shown in FIG. 4A, when a north-up map is displayed in one area 36 and an image other than the north-up map such as a front wide map is displayed in the other area 35, display control is performed. For example, as illustrated in FIG. 4B, the unit 23 displays the guide image output from the route guiding unit 22 in the other region 35.

  On the other hand, when the north-up map is not displayed in any area, the display control unit 23 displays one area 36 north-up map as shown in FIG. The guidance image output from the route guidance unit 22 is displayed.

  Thus, when the vehicle turns right or left, the navigation device 20 can display the north-up map so that the user can recognize the direction in which the vehicle will travel from north. Thereby, the user can maintain the recognition of the positional relationship between the current position and the target object without performing an operation such as displaying a map in order to confirm the positional relationship between the current position and the target object. .

  FIG. 5 is a flowchart illustrating an example of the operation of the navigation device 20 according to the first embodiment. For example, at a predetermined timing such as when the power is turned on, the navigation device 20 starts the operation shown in this flowchart.

  First, the route search unit 21 determines whether or not the search information including the coordinates of the departure point, the destination point, and the waypoint, the search condition, and the like has been received from the user via the input device 12. It is determined whether a search is instructed (S100). When a route search is instructed by the user (S100: Yes), the route search unit 21 refers to the link data in the database 25, and based on the search information, for example, using an algorithm such as the Dijkstra method, The route from the departure point to the destination point is searched (S101), and the search result is displayed on the display device 11.

  Next, the route search unit 21 determines whether or not the guidance route has been determined by determining whether or not information specifying the route searched for by the user is received via the input device 12 (S102). . When the route search is not instructed by the user (S100: No), or when the guidance route is not determined (S102: No), the route search unit 21 executes the process shown in step S100 again.

  When the guidance route is determined (S102: Yes), the route search unit 21 sends the determined guidance route to the route guidance unit 22 and the display control unit 23. The display control unit 23 acquires map data around the current position of the vehicle calculated by the current position calculation unit 24 from the database 25, and displays a car mark indicating the current position of the vehicle on the map in a predetermined map display mode. At the same time, the road corresponding to the guidance route is highlighted (S103).

  Next, the route guidance unit 22 refers to the current position of the vehicle calculated by the current position calculation unit 24 and the link data stored in the database 25, and guides within a predetermined distance ahead of the vehicle on the guidance route. It is determined whether or not a point exists (S104). When a guidance point exists within a predetermined distance ahead of the vehicle (S104: Yes), the route guidance unit 22 outputs a guidance image for guiding the traveling direction of the vehicle at the guidance point to the display control unit 23.

  Next, the display control unit 23 refers to the current display state of the display device 11 and determines whether or not the screen area is divided to display two screens (S105). For example, as shown in FIG. 4A, when the screen area is divided into two screen displays (S105: Yes), the display control unit 23 displays the north-up map in one screen area. It is determined whether or not (S106).

  When the north-up map is displayed in one screen area (S106: Yes), the display control unit 23 is output from the route guidance unit 22 to the other screen area, for example, as illustrated in FIG. 4B. The guide image is displayed (S107), and the display control unit 23 executes the process shown in step S103 again.

  When the north-up map is not displayed in any screen area (S106: No), the display control unit 23 displays the north-up map in one screen area and from the route guidance unit 22 in the other screen area. The output guide image is displayed (S108), and the display control unit 23 executes the process shown in step S103 again.

  In step S105, for example, as shown in FIG. 3A, if the screen area is not divided (S105: No), the display control unit 23 currently displays a north-up map on the screen of the display device 11. It is determined whether it is displayed (S109). When the north-up map is displayed (S109: Yes), the display control unit 23 divides the screen area of the display device 11 into two as shown in, for example, FIG. The north-up map being displayed is displayed, and the guidance image output from the route guidance unit 22 is displayed in the other screen area (S110), and the display control unit 23 executes the process shown in step S103 again. .

  When an image other than the north-up map is displayed on the screen of the display device 11 (S109: No), the display control unit 23 divides the screen area of the display device 11 into two, and the north-up map is displayed on one screen area. While displaying a map, the guide image output from the route guidance part 22 is displayed on the other screen area (S111), and the display control part 23 performs the process shown to step S103 again.

  In step S104, when there is no guidance point within a predetermined distance ahead of the vehicle (S104: No), the route guidance unit 22 is instructed by the user to end the route guidance, or the vehicle is near the destination. It is determined whether or not the route guidance is terminated due to reasons such as arrival (S112). When the route guidance is continued (S112: No), the route guidance unit 22 executes the process shown in step S104 again. When the route guidance is finished (S112: Yes), the route search unit 21 executes the process shown in step S100 again.

  The first embodiment of the present invention has been described above.

  As is clear from the above description, according to the navigation system 10 of the present embodiment, it is possible to reduce the user's operation for maintaining the recognition of the positional relationship between the current position and the target.

  Next, a second embodiment of the present invention will be described.

  FIG. 6 is a system configuration diagram illustrating an example of a configuration of the navigation system 10 according to the second embodiment. The navigation system 10 includes a display device 11, an input device 12, a sensor 13, and a navigation device 20. The navigation device 20 includes a display control unit 23, a current position calculation unit 24, a database 25, and a right / left turn determination unit 26. Except for the points described below, in FIG. 6, the components denoted by the same reference numerals as those in FIG. 1 have the same or similar functions as those in FIG.

  The right / left turn determination unit 26 refers to the link data in the database 25 and the current position and traveling direction of the vehicle calculated by the current position calculation unit 24 to determine whether the vehicle has turned right or left at the intersection. When the vehicle turns right or left at the intersection, the display control unit 23 is notified accordingly. For example, the right / left turn determination unit 26 travels a predetermined distance (for example, 10 m) or more in a state where the steering angle of the steering wheel is a predetermined angle (for example, 90 degrees) or more in an area within a predetermined distance (for example, 20 m) from the node indicating the intersection. In this case, it is determined that the vehicle has turned right or left.

  The display control unit 23 obtains a map of the mode instructed by the user via the input device 12 from the database 25, and displays it on the display device 11 together with a car mark indicating the current position of the vehicle calculated by the current position calculation unit 24. indicate. The display control unit 23 determines whether the north-up map is displayed on the display device 11 when the right / left turn determination unit 26 is notified that the vehicle has turned right or left at the intersection.

  For example, as shown in FIG. 7 (a), when the display device 11 displays an image other than the north-up map such as the front wide map, the right / left turn determination unit 26 indicates that the vehicle has turned right or left at the intersection. When notified, the display control unit 23 displays a north-up map on the display device 11, for example, as shown in FIG. The display control unit 23 restores the display of the display device 11 when a predetermined time (for example, 10 seconds) elapses after switching the display.

  For example, as shown in FIG. 8 (a), a right / left turn determination unit indicating that the vehicle has made a right or left turn at an intersection while an image other than a north-up map such as a front wide map is displayed on the display device 11. 26, the display control unit 23 divides the screen area of the display device 11 into two as shown in FIG. 8B, for example, and displays the north-up map in one area 45. You may make it display the image currently displayed on the other screen area | region.

  Further, if the display control unit 23 switches the display on the display device 11 after being notified from the right / left turn determination unit 26 that the vehicle has made a right or left turn at the intersection, the display control unit 23 switches the display on the display device 11 to a predetermined value. You may make it return the display of the display apparatus 11 after driving | running | working distance (for example, 100 m).

  FIG. 7A illustrates a front wide map before the left / right turn determination unit 26 determines that the vehicle has made a left turn, and FIG. A north-up map displayed after it is determined that has turned left is illustrated. Further, FIG. 8A illustrates a front wide map before the left / right turn determination unit 26 determines that the vehicle has made a left turn. FIG. A front wide map and a north up map displayed after it is determined that the vehicle has turned left are illustrated.

  FIG. 9 is a flowchart illustrating an example of the operation of the navigation device 20 according to the second embodiment. For example, at a predetermined timing such as when the power is turned on, the navigation device 20 starts the operation shown in this flowchart.

  First, the right / left turn determination unit 26 refers to the link data in the database 25 and the current position and traveling direction of the vehicle calculated by the current position calculation unit 24 to determine whether the vehicle has turned right or left at the intersection. Is determined (S200). When the vehicle does not turn right or left at the intersection (S200: No), the right / left turn determination unit 26 executes the process shown in step S200.

  When the vehicle turns right or left at the intersection (S200: Yes), the right / left turn determination unit 26 notifies the display control unit 23 to that effect. And the display control part 23 determines whether the north-up map is displayed on the display apparatus 11 (S201). When the north-up map is displayed on the display device 11 (S201: Yes), the right / left turn determination unit 26 executes the process shown in step S200 again.

  When the north-up map is not displayed on the display device 11 (S201: No), the display control unit 23 displays the north-up map on the display device 11 (S202), and displays a predetermined time after displaying the north-up map. It is determined whether or not it has passed (S203). When the predetermined time has elapsed (S203: Yes), the display control unit 23 restores the display of the display device 11 (S204), and the right / left turn determination unit 26 executes the process shown in step S200 again.

  The second embodiment of the present invention has been described above.

  As is clear from the above description, also in the navigation system 10 of the present embodiment, the user's operation for maintaining the recognition of the positional relationship between the current position and the target can be reduced.

  In addition, the navigation apparatus 20 in the said 1st or 2nd embodiment is implement | achieved by the computer 50 of a structure as shown, for example in FIG. The computer 50 includes a central processing unit (CPU) 51, a random access memory (RAM) 52, a read only memory (ROM) 53, a hard disk drive (HDD) 54, an input interface (I / F) 55, an output interface (I / F). F) 56 and a media interface (I / F) 57.

  The CPU 51 operates based on a program stored in the ROM 53 or the HDD 54 and controls each unit. The ROM 53 stores a boot program executed by the CPU 51 when the computer 50 is started up, a program depending on the hardware of the computer 50, and the like. The HDD 54 stores a program executed by the CPU 51.

  The input interface 55 receives a signal from the input device 12 and sends it to the CPU 51. The CPU 51 controls the input device 12 via the input interface 55 and acquires a signal from the input device 12 via the input interface 55. The output interface 56 outputs the data acquired from the CPU 51 to the display device 11. The CPU 51 controls the display device 11 via the output interface 56 and outputs the generated data to the display device 11 via the output interface 56.

  The media interface 57 reads a program or data stored in the recording medium 58 and provides it to the CPU 51 via the RAM 52. The CPU 51 loads the program from the recording medium 58 onto the RAM 52 via the media interface 57 and executes the loaded program. The recording medium 58 is, for example, an optical recording medium such as a DVD (Digital Versatile Disk) or PD (Phase change rewritable disk), a magneto-optical recording medium such as an MO (Magneto-Optical disk), a tape medium, a magnetic recording medium, or a semiconductor memory. Etc.

  When the computer 50 functions as the navigation device 20 in the first embodiment, the CPU 51 of the computer 50 executes a program loaded on the RAM 52 to thereby execute the route search unit 21, the route guidance unit 22, and the display control unit 23. The functions of the current position calculation unit 24 and the database 25 are realized. The ROM 53 or the HDD 54 stores data in the database 25.

  Further, when the computer 50 functions as the navigation device 20 in the second embodiment, the CPU 51 of the computer 50 executes the program loaded on the RAM 52 to thereby display the display control unit 23, the current position calculation unit 24, and the database. 25 and each function of the right / left turn determination unit 26 is realized. The ROM 53 or the HDD 54 stores data in the database 25.

  The computer 50 reads and executes these programs from the recording medium 58. As another example, the computer 50 is provided with a communication function, and the computer 50 acquires these programs via a wired or wireless communication line. You may make it do.

  Further, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist thereof.

  For example, in each of the embodiments described above, the display control unit 23 displays the north-up map when the north-up map is not displayed at a predetermined timing. In this case, the display control unit 23 displays the display. If a map is displayed on the screen of the display device 11 before switching, the north-up map may be displayed at the same scale as the map displayed before switching the display. Thereby, the display control part 23 can suppress the change of the map to display, and can prevent a user from being confused.

  In each of the embodiments described above, the display control unit 23 displays the north-up map at a predetermined timing when the north-up map is not displayed. In this case, the display control unit 23 displays the display. If a map is displayed on the screen of the display device 11 before switching, the north-up map may be displayed at a smaller scale than the map displayed before switching the display. Thereby, the user can recognize the position and the traveling direction of the host vehicle on a map of a wider area with reference to the north direction, and the accuracy of recognizing the positional relationship between the current position and the target is kept higher. be able to.

DESCRIPTION OF SYMBOLS 10 ... Navigation system, 11 ... Display device, 12 ... Input device, 13 ... Sensor, 20 ... Navigation device, 21 ... Route search part, 22 ... Route guidance part, 23 ... Display control unit, 24 ... Current position calculation unit, 25 ... Database, 26 ... Right / left turn determination unit, 50 ... Computer, 51 ... CPU, 52 ... RAM, 53 ... ROM, 54 ... HDD, 55 ... input interface, 56 ... output interface, 57 ... media interface, 58 ... recording medium

Claims (13)

A navigation device mounted on a vehicle,
A database that stores link data and map data that are information about links indicating roads;
Current position calculating means for calculating a current position and a traveling direction of the vehicle;
Based on information indicating the departure point and destination point received from the user, with reference to the database, route search means for searching for a route from the departure point to the destination point;
When there is an intersection to be guided within a predetermined distance ahead of the current position of the vehicle on the guidance route, with the route determined by the user among the routes searched by the route search means as a guidance route, Route guidance means for outputting a guidance image for guiding the direction in which the vehicle should travel at the intersection;
When the guidance image is output from the route guidance means, the screen area of the display device is divided into two areas, and the current position of the vehicle together with a map in which the upper part of the screen of the display device is in the north direction in one area A navigation apparatus comprising: a display control means for displaying a north-up map for displaying a car mark indicating the position and displaying the guide image in the other area. The navigation device according to claim 1,
The display control means includes
The navigation device, wherein the north-up map is displayed at the same scale as the map displayed in the screen area before the guidance image is output from the route guidance means. The navigation device according to claim 1,
The display control means includes
The navigation device, wherein the north-up map is displayed at a smaller scale than the map displayed in the screen area before the guide image is output from the route guidance means. The navigation device according to claim 1,
The display control means includes
The screen area of the display device is divided into two areas, the north-up map is displayed in one area, and an image other than the north-up map is displayed in the other area. A navigation device that displays the guide image in the other area when an image is output. A navigation device mounted on a vehicle,
A database that stores link data and map data that are information about links indicating roads;
Current position calculating means for calculating a current position and a traveling direction of the vehicle;
Right / left turn determination means for determining whether the vehicle has made a right turn or a left turn at an intersection with reference to the link data in the database, and the current position and traveling direction of the vehicle,
A north-up map displaying a car mark indicating the current position of the vehicle together with a map in which the upper part of the screen of the display device is in the north direction when the vehicle determines that the vehicle has made a right turn or a left turn at the intersection. A navigation device comprising display control means for displaying. The navigation device according to claim 5,
The display control means includes
When the vehicle determines that the vehicle has made a right turn or a left turn at the intersection, the screen area of the display device is divided into two, the north up map is displayed in one area, and the other The navigation device, wherein an image displayed on the display device before the vehicle determines that the vehicle has made a right turn or a left turn at the intersection is displayed in the area. The navigation device according to claim 5,
The display control means includes
After the north-up map is displayed after the vehicle determines that the vehicle has made a right or left turn at the intersection, the display device displays the right / left turn when a predetermined time has elapsed. A navigation apparatus, wherein the vehicle is returned to a state before it is determined by the determination means that the vehicle has made a right or left turn at the intersection. The navigation device according to claim 5,
The display control means includes
A north-up map to be displayed when the vehicle determines that the vehicle has made a right or left turn at the intersection is determined by the right / left turn determination unit, and before the vehicle has determined that the vehicle has made a right or left turn at the intersection. A navigation device, characterized by being displayed at the same scale as the map displayed on the screen of the display device. The navigation device according to claim 5,
The display control means includes
A north-up map to be displayed when the vehicle determines that the vehicle has made a right or left turn at the intersection is determined by the right / left turn determination unit, and before the vehicle has determined that the vehicle has made a right or left turn at the intersection. A navigation device, characterized by being displayed at a smaller scale than the map displayed on the screen of the display device. A map display method in a navigation device mounted on a vehicle,
The navigation device is
A current position calculating step for calculating a current position and a traveling direction of the vehicle;
Based on the information indicating the departure point and the destination point received from the user, a route from the departure point to the destination point is searched with reference to a database storing link data and map data that are information related to the road indicating the road. A route search step to
When there is an intersection to be guided within a predetermined distance ahead of the current position of the vehicle, using the route determined by the user among the routes searched in the route search step as a guidance route, the vehicle advances at the intersection. A route guidance step for outputting a guidance image for guiding the power direction;
A screen area of the display device is divided into two, and a north-up map displaying a car mark indicating the current position of the vehicle together with a map in which the upper part of the screen of the display device is in the north direction is displayed in one area, And a display control step of displaying the guidance image output in the route guidance step in the area of the map. A map display method in a navigation device mounted on a vehicle,
The navigation device is
A current position calculating step for calculating a current position and a traveling direction of the vehicle;
Whether the vehicle has made a right or left turn at the intersection with reference to link data in a database storing map data and link data, which is information about a link indicating a road, and the current position and traveling direction of the vehicle A right / left turn determination step to determine;
When determining that the vehicle has made a right or left turn at the intersection in the right / left turn determination step, the upper part of the screen of the display device displays a north-up map that displays a car mark indicating the current position of the vehicle along with a map in the north direction And a display control step for executing the map display method. A program for causing a computer to function as a navigation device mounted on a vehicle,
In the computer,
A database that stores link data and map data, which is information about links indicating roads,
A current position calculating function for calculating a current position and a traveling direction of the vehicle;
A route search function for searching a route from the departure point to the destination point with reference to the database based on information indicating the departure point and destination point received from the user,
When there is an intersection to be guided within a predetermined distance in front of the current position of the vehicle, using the route determined by the user among the routes searched by the route search function as a guidance route, the vehicle at the intersection A route guidance function for outputting a guidance image for guiding a direction to travel, and a screen area of the display device divided into two, and a vehicle with a map in which the upper part of the screen of the display device is in the north direction in one area A program for displaying a north-up map for displaying a car mark indicating the current position of the vehicle and for displaying a guide image output from the route guidance function in the other area. A program for causing a computer to function as a navigation device mounted on a vehicle,
In the computer,
A database that stores link data and map data, which is information about links indicating roads,
A current position calculating function for calculating a current position and a traveling direction of the vehicle;
By referring to the link data in the database, the current position and the traveling direction of the vehicle, the right / left turn determination function for determining whether the vehicle has made a right turn or left turn at an intersection, and the right / left turn determination function Realizes a display control function that displays a north-up map that displays a car mark indicating the current position of the vehicle along with a map in which the upper part of the screen of the display device is in the north direction when it is determined that the vehicle turns right or left at the intersection A program characterized by letting

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