JP2008157760A - Map display device, method, and program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map displaying intelligibly a road easily passable by a moving body. <P>SOLUTION: This map display device 100 acquires a map displaying information on the moving body on a display screen 110 by a map information acquisition part 102, and information on a road on the map respectively by a moving body information acquisition part 101, and extracts a recommendation route easily passable by the moving body based on the information on the moving body and the information on the road on the map by an extraction part 103. A display control part 104 displays the map acquired by the map information acquisition part 102 on the display screen 110 as an image emphasizing the recommendation route extracted by the extraction part 103. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a map display device, a map display method, a map display program, and a recording medium that display on a display screen a map used to support the movement of a moving object. However, the use of the present invention is not limited to the above-described map display device, map display method, map display program, and recording medium.

  2. Description of the Related Art Conventionally, a technique for displaying a map that makes it easier for a driver of a moving body to drive has been developed. For example, when a map is displayed for route guidance, there is a driving support device that displays width-shift guidance together. This driving support device has a function of detecting a left turn point on a set guidance route, and based on an image sensor, a radar sensor, or the like when it is determined that a check point set in advance before the left turn point is passed. Determine whether it is possible to adjust the width before the left turn point. When it is determined that the width can be adjusted, a guide for performing the width adjustment is displayed, and when it is determined that the width cannot be adjusted, a guidance for prohibiting the width adjustment is displayed (for example, (See Patent Document 1 below.)

Japanese Patent Laid-Open No. 2006-251894

  However, in the technique of the above-mentioned Patent Document 1, the driving support information such as the width-shifting guidance is not displayed unless the driving support information such as the width-shifting guidance comes immediately before the guidance location after starting the travel based on the route. That is, guidance information such as the width of the road cannot be known for a driver who starts traveling or a driver who refers only to map information without using the route guidance function.

  In addition, when the driver of the mobile body decides a road to travel by using the map information displayed on the screen without using the route guidance function, for example, try to actually travel on the determined road. And the width of the road is narrow and it may take a lot of time to pass. That is, the problem of facing a road that is not suitable for traffic according to the driving ability of the driver, the size of the moving body, and the like is given as an example.

  A map display device according to a first aspect of the present invention is a map display device for displaying a map used for supporting movement of a mobile object on a display screen, and mobile object information acquisition means for acquiring information relating to the mobile object. A map to be displayed on the display screen, map information acquisition means for acquiring information on roads on the map, information on the mobile object acquired by the mobile object information acquisition means, and the map information acquisition means Based on the information on the road on the acquired map, extracting means for extracting a recommended road recommended as a road to be used for the movement of the moving body, and highlighting the recommended road extracted by the extracting means, Display control means for displaying the map acquired by the map information acquisition means on the display screen.

  According to a seventh aspect of the present invention, there is provided a map display method for displaying a map used for supporting movement of a mobile object on a display screen, wherein the map display method is for acquiring information relating to the mobile object. A body information acquisition step, a map to be displayed on the display screen, a map information acquisition step of acquiring information on roads on the map, information on the mobile body acquired by the mobile body information acquisition step, and the map information An extraction step for extracting a recommended road recommended as a road to be used for movement of the mobile body based on information on roads on the map acquired by the acquisition step, and a recommended road for the mobile body extracted by the extraction step And a display step of displaying the map acquired in the map information acquisition step on the display screen.

  A map display program according to an invention of claim 8 causes a computer to execute the map display method according to claim 7.

  A recording medium according to a ninth aspect of the invention is characterized in that the map display program according to the eighth aspect is recorded in a computer-readable manner.

  Exemplary embodiments of a map display device, a map display method, a map display program, and a recording medium according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Functional configuration of map display device)
First, the functional configuration of the map display device according to the present invention will be described. FIG. 1 is a block diagram showing an example of a functional configuration of a map display device according to the present embodiment of the present invention. The map display device 100 of FIG. 1 is a device that displays a map for a passenger of a moving body on a connected display screen 110. The connection between the map display device 100 and the display screen 110 may be wired or wireless. Further, the display screen 110 may be a device independent from the map display device 100, or may be a monitor built in the map display device 100.

  The functional configuration of the map display device 100 will be described in detail. The map display device 100 includes a moving body information acquisition unit 101, a map information acquisition unit 102, an extraction unit 103, a display control unit 104, and a setting unit 105. It is configured to include.

  The moving body information acquisition unit 101 acquires information about a moving body. The information on the moving body includes size information such as width and height of the moving body, weight information, vehicle type information, and the like. In the moving body information acquisition unit 101, the information acquired by the extraction unit 103, which will be described later, also changes depending on what kind of information is used to determine a road that is easy to pass, that is, a recommended road when passing by a moving body. To do.

  That is, when a road that is easy to pass is determined as a recommended road based on the width or height (when there is a roof), only size information is acquired as information on the moving object. In addition, when the road gradient and the road surface type (concrete, gravel road, etc.) are also included in the determination criteria, a driving method such as FF, FR, 4WD, etc. is also acquired as information related to the moving body.

  Note that there is no particular limitation on the method of acquiring information related to the moving object by the moving object information acquisition unit 101, and any method may be used. For example, information relating to a moving object may be registered in the map display device 100 in advance, and a method of reading out and acquiring necessary information with the activation of the map display device 100 as a trigger may be used. A method of acquiring information on the moving body from the model number or identification number of the body may be used, or the above two methods may be used in combination.

  The map information acquisition unit 102 acquires a map to be displayed on the display screen 110 and information regarding roads on the map. Information on roads on the map includes road width, height limit, weight limit, and other regulatory information. Further, as described above, when the road condition is used as a determination criterion, information on the road gradient and road surface type (concrete, gravel road, etc.) is also acquired as map information. In addition, there is no limitation in particular also in the method of acquiring the information regarding a road by the map information acquisition part 102. FIG.

  The extraction unit 103 is a road used for the movement of the mobile body based on the information on the mobile body acquired by the mobile body information acquisition unit 101 and the information on the road on the map acquired by the map information acquisition unit 102. Extract recommended roads to recommend. The recommended road is a road that is easy to pass when a passenger travels by a moving body. The standard of ease of passage can be arbitrarily set by the passenger by the setting unit 105 described later. Specifically, for example, when the width is used as a reference for ease of passage, the road is easy for the moving body to pass if there is a margin of a predetermined value or more than the width of the moving body.

  The display control unit 104 emphasizes the recommended road extracted by the extraction unit 103 and causes the display screen 110 to display the map acquired by the map information acquisition unit 102. That is, the map displayed on the display screen 110 is a map in which recommended roads are emphasized. The emphasized image is an image configured in such a manner that the recommended road is easier for the passenger to understand (easily visually confirmed) than the other roads.

  Specifically, the recommended road is thicker than other roads, the image of only the recommended road is changed, the image of only the recommended road is darkened, or the image of the road other than the recommended road is lightened, Etc. In addition to the image in which the recommended road is emphasized, the recommended road may be displayed in an emphasized manner. For example, the recommended road is displayed in a blinking manner, or the recommended road is lightened from the other roads. As long as it is a display form that can be visually recognized separately, various methods can be adopted.

  The setting unit 105 sets conditions for extracting recommended roads by the extraction unit 103. That is, it is possible to set what kind of road is a road through which a moving body can easily pass. When the condition is set by the setting unit 105, the extraction unit 103 acquires items corresponding to the condition from the information about the moving body and the information about the road when extracting the recommended road. Then, it is determined whether or not a preset condition is satisfied, and a road satisfying the condition is extracted as a recommended road.

  In addition to the recommended road, the map display device 100 can also highlight and display roads that are not allowed to pass or roads that are difficult to pass as non-recommended roads. For example, when a road that cannot pass is highlighted and displayed, the extraction unit 103 extracts a road that the mobile body cannot pass based on the information about the mobile body and the information about the road. Then, the display control unit 104 causes the display screen 110 to display an image in which the road in which the moving body extracted by the extraction unit 103 is impassable is emphasized in a manner different from the recommended road.

  In addition, when highlighting and displaying a non-recommended road that is difficult for the moving body to pass, the extraction unit 103 extracts a road that does not satisfy the set conditions as a non-recommended road that is difficult for the moving body to pass. Then, the display control unit 104 may display the non-recommended road on the display screen 110 using a map acquired from the map information acquisition unit 102 in an image that is emphasized in a manner different from the recommended road.

  As described above, when a plurality of types of roads are extracted, the setting unit 105 may set a road to be highlighted on the display screen 110 among the recommended road, the non-passable road, and the non-recommended road. In this case, the display control unit 104 causes the display screen 110 to display an image in which the road set by the setting unit 105 is emphasized.

(Contents of map display device processing)
Next, the processing contents of the map display device will be described. Here, a case will be described in which a road that is easy to pass is highlighted on the map as a recommended road when traveling with a moving body. FIG. 2 is a flowchart showing the contents of processing of the map display device. In the flowchart of FIG. 2, first, it is determined whether or not the mobile object information acquisition unit 101 has acquired information related to a mobile object (step S201). Here, it waits until it acquires the information regarding a moving body (step S201: No loop), and if acquired (step S201: Yes), then whether the map information acquisition part 102 acquired the map and the information regarding a road? It is determined whether or not (step S202).

  In step S202, the process waits until a map and information about a road are acquired (step S202: No loop). If acquired (step S202: Yes), whether or not a recommended road condition is set in the setting unit 105 is determined. Is determined (step S203).

  If the recommended road condition is set in step S203 (step S203: Yes), the process directly proceeds to step S205. On the other hand, when the recommended road condition is not set (step S203: No), the pre-specified initial condition is set as the recommended road condition (step S204), and the process proceeds to step S205. Note that the processing procedures of each determination in steps S201 to S203 described above may be reversed.

  Next, in the extraction unit 103, a recommended road is extracted (step S205). In this step S205, based on the information on the moving body acquired in step S201, the information on the road acquired in step S202, and the conditions set in step S203, the road on which the moving body is easy to pass is extracted. . Then, the display control unit 104 displays an image in which the recommended road on the map is emphasized on the display screen 110 (step S206), and the series of processing ends.

  By performing the processing as described above, the map display device 100 can highlight a road on which the mobile body easily passes on the display screen 110 as a recommended road. Therefore, the passenger of the moving body can select an appropriate route through which the user can travel without difficulty even when traveling with the moving body on board.

  Examples of the present invention will be described below. Here, the map display device 100 according to the above-described embodiment is applied to a navigation device mounted on a moving body such as a vehicle (including a four-wheeled vehicle and a two-wheeled vehicle). In addition, when the map display device according to the present invention is mounted on a navigation device, it is easy to pass through map information displayed on the display even during route guidance or in other states. Emphasize that it cannot be done. Hereinafter, a specific hardware configuration and processing contents of the above-described navigation device will be described.

(Hardware configuration of navigation device)
First, a hardware configuration of a navigation device according to an embodiment of the present invention will be described. FIG. 3 is a block diagram illustrating an example of a hardware configuration of the navigation device according to the embodiment of the present invention.

  In FIG. 3, the navigation device 300 includes a CPU 301, a ROM 302, a RAM 303, a magnetic disk drive 304, a magnetic disk 305, an optical disk drive 306, an optical disk 307, an audio I / F (interface) 308, and a microphone 309. A speaker 310, an input device 311, a video I / F (interface) 312, a display 313, a camera 314, a communication I / F (interface) 315, a GPS unit 316, and various sensors 317. I have. Each component 301 to 317 is connected by a bus 320.

  The CPU 301 governs overall control of the navigation device 300. The ROM 302 records various programs such as a boot program, a route search program, a route guidance program, a voice generation program, a communication program, a database creation program, a data analysis program, and a map display program.

  The route search program searches for an optimum route from the departure point to the destination using map information recorded on the optical disk 307 to be described later. Here, the optimum route is the shortest (or fastest) route to the destination or the route that best meets the conditions specified by the user. The guidance route searched by executing this route search program is output to the audio I / F 308 and the video I / F 312 via the CPU 301, for example.

  The route guidance program is based on the guidance route information searched by executing the above-described route search program, the current position of the navigation device 300 acquired by the communication I / F 315, and the map information read from the optical disc 307. Real-time route guidance information can be generated. The route guidance information generated by executing the route guidance program is output to the audio I / F 308 and the video I / F 312 via the CPU 301, for example.

  The voice generation program generates tone and voice information corresponding to the voice pattern. That is, based on the route guidance information generated by executing the route guidance program, the virtual sound source corresponding to the guidance point is set and the voice guidance information is generated. For example, the generated voice guidance information is stored in the CPU 301. To the audio I / F 308.

  Further, the map display program causes the map image to be displayed on the display 313 as an image in which a road that is easy for a vehicle on which the navigation device 300 is mounted is emphasized as a recommended travel road. Detailed processing contents of the map display program will be described later with reference to FIGS.

  The RAM 303 is used as a work area for the CPU 301, for example. The magnetic disk drive 304 controls the reading / writing of the data with respect to the magnetic disk 305 according to control of CPU301. The magnetic disk 305 records data written under the control of the magnetic disk drive 304.

  The optical disk drive 306 controls the reading / writing of the data with respect to the optical disk 307 according to control of CPU301. The optical disk 307 is a detachable recording medium from which data is read according to the control of the optical disk drive 306. As the optical disk 307, a writable recording medium can be used. In addition to the optical disk 307, an MO, a memory card, or the like can be used as a removable recording medium.

  The magnetic disk 305 and the optical disk 307 store map information used when executing a route search program, a route guidance program, and a map display program. This map information also stores information related to roads displayed on the map, and information on necessary items is read when the map display program is executed. The information regarding the road is composed of items such as width information, height restriction information, and weight restriction information. The information regarding these roads may be newly acquired from the outside via the communication I / F 315 described later, or may be used in addition to the information provided together with the map information in advance. When information about a road is newly acquired from the outside, the acquired information is stored in the magnetic disk 305 or the optical disk 307.

  The magnetic disk 305 and the optical disk 307 store information related to the vehicle on which the navigation device 300 is mounted. The vehicle information includes items such as vehicle width information, vehicle height information, vehicle body weight information, and vehicle type information. Information about the vehicle may be acquired directly from the vehicle when the navigation device 300 is mounted, or may be acquired from the outside via the communication I / F 315.

  Information relating to roads and information relating to vehicles stored on the magnetic disk 305 and the optical disk 307 as described above are stored in the necessary items by the CPU 301 according to the recommended road conditions set when the map display program is executed. Information is read as appropriate.

  The audio I / F 308 is connected to a microphone 309 for audio input and a speaker 310 for audio output. The sound received by the microphone 309 is A / D converted in the sound I / F 308. Note that the speaker 310 may be provided not only inside the vehicle but also outside the vehicle. From the speaker 310, sound based on the sound signal from the sound I / F 308 is output. The sound input from the microphone 309 can be recorded on the magnetic disk 305 or the optical disk 307 as sound data, for example.

  Examples of the input device 311 include a remote controller having a plurality of keys for inputting characters, numerical values, various instructions, a keyboard, a mouse, a touch panel, and the like. The input device 311 inputs, for example, a set value that is a condition for a road that is easy to travel when the user recommends a travel recommended road on the display 313 by a map display program.

  The video I / F 312 is connected to the display 313 and the camera 314. Specifically, the video I / F 312 includes, for example, a graphic controller that controls the entire display 313, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. And a control IC for controlling display of the display 313 on the basis of image data output from the image data. Further, the image pickup signal input from the camera 314 is controlled and processing for recording on the magnetic disk 305 or the optical disk 307 is performed.

  The display 313 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 313, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.

  The camera 314 is a photographing device provided in a vehicle on which the navigation device 300 is mounted. Specifically, an image for performing driving support by capturing a subsequent vehicle, a parking space in a parking lot, an adjacent vehicle, or the like is acquired. The camera 314 may use an infrared camera in addition to a normal visible light camera.

  In addition, the communication I / F 315 is connected to a network via wireless and functions as an interface between the navigation device 300 and the CPU 301. The communication I / F 315 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 301.

  The network includes a LAN, a WAN, a public line network, a mobile phone network, and the like. Specifically, the communication I / F 315 includes, for example, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, a radio navigation device, and other navigation devices, and is distributed from the VICS center. Get road traffic information such as traffic jams and traffic regulations.

  Further, the GPS unit 316 calculates position information indicating the current position of the vehicle (current position of the navigation device 300) using received waves from GPS satellites and output values from various sensors 317 described later. The position information indicating the current position is information specifying one point on map information such as latitude / longitude and altitude, for example. Further, the GPS unit 316 outputs an odometer, a speed change amount, an azimuth change amount, and the like using output values from the various sensors 317. Thereby, the dynamics of the vehicle such as a sudden brake and a sudden handle can be analyzed.

  The various sensors 317 are a vehicle speed sensor, an acceleration sensor, an angular velocity sensor, an azimuth sensor, an optical sensor, and the like, and output values thereof are used for calculation of position information by the GPS unit 316, measurement of changes in speed and azimuth, and the like. .

  Note that the mobile body information acquisition unit 101 and the map information acquisition unit 102, which are functional configurations of the map display device 100 according to the embodiment shown in FIG. 1, specifically include, for example, a CPU 301, a ROM 302, a RAM 303, and a magnetic disk. The functions are realized by the drive 304, the optical disk drive 306, the input device 311 and the communication I / F 315. Further, the functions of the extraction unit 103 and the display control unit 104 are realized by, for example, the CPU 301, the ROM 302, the RAM 303, and the video I / F 312. Further, specifically, the display screen 110 realizes its function by, for example, the CPU 301, the video I / F 312, and the display 313.

(Contents of map image display processing considering vehicle width information)
Next, the contents of the map image display process considering the vehicle width information by the navigation device 300 having the above-described configuration will be described. The navigation device 300 normally displays map information up to the current position and the guidance route. At this time, on the display 313, for example, if route guidance is being performed, map information in which the guidance route is emphasized is displayed. Further, if route guidance is not performed, map information in which no road is emphasized is displayed as it is. Here, such a state is a normal map information display state.

  In this embodiment, when displaying a map image in consideration of the vehicle width information, the vehicle width information consideration mode is selected from the input device 311 and the map information in which the recommended travel road is emphasized is displayed. FIG. 4 is a flowchart showing a procedure of map image display processing in consideration of vehicle width information.

  In the flowchart of FIG. 4, it is first determined whether or not the vehicle width information consideration mode has been selected (step S401). Here, if the vehicle width information consideration mode is selected (step S401: Yes), it is next determined whether or not the vehicle width information of the vehicle on which the navigation device 300 is mounted is registered (step S402). . In step S401, when the vehicle width information consideration mode is not selected (step S401: No), the display returns to the normal map information display (step S413), and the series of display processing ends.

  If vehicle width information is registered in step S402 (step S402: Yes), road width information of the map information currently displayed on the display 313 is acquired (step S403). In step S403, the acquired width information may be limited to roads ahead of the traveling direction of the vehicle. By acquiring the width information only for the road ahead of the traveling direction of the vehicle, it is possible to extract and highlight the recommended travel road from the road where the passenger of the vehicle may travel from now on. At the same time, since the width information to be acquired is limited, the processing amount of information when the map display program is executed can be reduced.

  Next, the width and the vehicle width are compared for each road (step S404), and it is determined whether or not the width is wider than the vehicle width by xm or more (step S405). The xm is a margin width obtained by subtracting the vehicle width from the width preset by the driver (hereinafter referred to as “width margin”). That is, in the case of a vehicle having a vehicle width of 1.77 m, if the width margin is 2 m, it is determined that the width is xm or more wider than the vehicle width if the width is 3.77 m or more.

  If it is determined in step S405 that the width is wider than the vehicle width by xm or more (step S405: Yes), this road is extracted as a recommended travel road through which the vehicle can easily pass (step S406). On the other hand, if it is determined in step S405 that the width is not xm or more wider than the vehicle width (step S405: No), this road is not a recommended travel road, and the process directly proceeds to step S408.

  In the comparison in step S404, the case where xm is 2 m is set as an initial setting. However, if the driver is confident in the driving technique, 1.5 m is used. It is also possible to adjust the setting of the width margin, which is a recommended travel road. The width margin can be set on the vehicle width information registration screen shown in FIG.

  Then, the recommended travel road in the map information displayed on the display 313 is highlighted (step S407). Thereafter, it is determined whether or not the comparison target road exists in the map information (step S408). If the comparison target road does not exist (step S408: No), the series of display processing ends. On the other hand, if there is a comparison target road in step S408 (step S408: Yes), the process returns to step S405, and the process of steps S405 to S407 is performed on the new comparison target road.

  In step S402, when the vehicle width information of the vehicle on which the navigation device 300 is mounted is not registered (step S402: No), the process proceeds to a process of newly registering the vehicle width information.

  FIG. 5 is an explanatory diagram showing an example of a vehicle width information registration screen. When the vehicle width information is newly registered, first, the vehicle width information registration screen 500 as shown in FIG. 5 is displayed on the display 313 (step S409). When the vehicle width information registration screen 500 is displayed on the display 313, the user can input to the vehicle width input field 501 using the input device 311. When a numerical value corresponding to the vehicle is input to the vehicle width input field 501 and the registration button 503 is selected, new vehicle width information is registered.

  In addition, in the vehicle width information registration screen 500, the width of the vehicle can be registered together with the registration of the vehicle width information. When setting the width margin, an optimum width margin value (m) is input to the width margin input field 502 by the input device 311. When the registration button 503 is selected, the width margin is set in association with the registration of the vehicle width information.

  Returning to the flowchart of FIG. 4, when the vehicle width information registration screen 500 is displayed on the display 313 in step S409, it is next determined whether new vehicle width information has been registered (step S410). If vehicle width information is registered in step S410 (step S410: Yes), the process proceeds to step S403, and a process for extracting a recommended travel road is performed according to the registered vehicle width information.

  If vehicle width information is not registered in step S410 (step S410: No), time measurement is started (step S411), and a predetermined time has elapsed since the vehicle width information registration screen 500 was displayed in step S409. It is determined whether or not it has been done (step S412). If the predetermined time has not elapsed (step S412: NO), the process returns to step S410, and it is determined again whether or not it has been registered.

  If it is determined in step S410 that the vehicle width information has not been registered again (step S410: No), the subsequent step S411 does not start timing but continues the timing started in the previous step 411. To do. Therefore, the elapsed time after the vehicle width information registration screen 500 is displayed is accumulated. Even if the above processing is repeated and the vehicle width information registration screen 500 is displayed, if the predetermined time has elapsed without registration of the vehicle width information (step S412: Yes), the display returns to the normal map information display (step S412). S413) A series of display processing is terminated as it is.

  FIG. 6 is an explanatory diagram showing an example of a map display highlighting easy-to-pass roads. By performing the display process described above, the map information in which the recommended travel road on which the vehicle can easily pass is displayed on the display 313 of the navigation device 300. In the map display example 600 of FIG. 6, the recommended travel road for the vehicle 601 equipped with the navigation device 300 is displayed with a thicker line than the other roads. The display with the thick line is an example of the highlight display, and, for example, the display may be performed with a specified color.

  Moreover, the setting of the width margin may be recorded in a state of being linked to each driver. For example, when the vehicle width information consideration mode is selected, the width margin setting xm recorded in association with the current driver is read and used for the determination in step S405. By performing such processing, a road suitable for each driver can be displayed as a recommended travel road.

  In addition, when acquiring road width information of the map information currently displayed on the display 313 in step S403 of the flowchart of FIG. 4, the information about the width of the road is not the width information of one lane but the oncoming lane, When the road width includes a plurality of lane widths, the road width / number of lanes = width information is set.

  In addition to the processing of the flowchart of FIG. 4, when displaying a road where the vehicle cannot pass, the vehicle width is compared with the width, and when the width is less than the vehicle width, the vehicle passes through the compared road. It is displayed as a road that cannot.

  In addition, when traveling with the map information displayed on the navigation device 300, the road to be determined as to whether or not it is a recommended travel road varies depending on the travel. In such a case, the map information to be displayed on the display 313 is monitored, and it is determined whether or not the newly displayed road is a recommended road according to the change in display contents.

  For example, if the map information to be displayed on the display 313 is divided into meshes and given addresses, the recommended road may be determined on a mesh basis. Furthermore, according to the traveling direction of the vehicle, a mesh that is expected to be displayed in the future is selected, and a recommended road on the mesh is extracted in advance even before it is actually displayed on the display 313. Also good. By such processing, the recommended road can be displayed without any delay even when the vehicle is traveling.

  As described above, according to the map display device, the map display method, the map display program, and the recording medium, it is possible to easily select an appropriate route that can be easily traveled even when traveling in a vehicle on board. it can.

  The map display method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

It is a block diagram which shows an example of a functional structure of the map display apparatus of this Embodiment of this invention. It is a flowchart which shows the content of the process of a map display apparatus. It is a block diagram which shows an example of the hardware constitutions of the navigation apparatus concerning the Example of this invention. It is a flowchart which shows the procedure of the display process of the map image in consideration of vehicle width information. It is explanatory drawing which shows an example of a vehicle width information registration screen. It is explanatory drawing which shows an example of the map display which emphasized the road which is easy to pass.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Map display apparatus 101 Mobile body information acquisition part 102 Map information acquisition part 103 Extraction part 104 Display control part 105 Setting part 110 Display screen

Claims (9)

A map display device that displays on a display screen a map used to support movement of a moving object,
Mobile object information acquisition means for acquiring information relating to the mobile object;
A map to be displayed on the display screen, map information acquisition means for acquiring information on roads on the map,
Recommendation recommended as a road to be used for the movement of the mobile body based on the information on the mobile body acquired by the mobile body information acquisition means and the information on the road on the map acquired by the map information acquisition means Extraction means for extracting roads;
Display control means for emphasizing the recommended road extracted by the extraction means and displaying the map acquired by the map information acquisition means on the display screen;
A map display device comprising: A setting means for setting a condition for extracting the recommended road by the extracting means;
The extraction means acquires items corresponding to the conditions set by the setting means from the information on the moving body and the information on the road, determines whether or not the conditions are satisfied, and roads that satisfy the conditions The map display device according to claim 1, wherein the map is extracted as a recommended road. The extracting means extracts an inaccessible road of the moving body based on information on the moving body and information on the road,
The display control unit emphasizes the inaccessible road of the moving body extracted by the extraction unit in a manner different from the recommended road, and displays the map acquired by the map information acquisition unit on the display screen The map display device according to claim 1 or 2, wherein The extraction means extracts a road that does not satisfy the set condition as a non-recommended road that is difficult for the moving body to pass,
The display control means emphasizes the non-recommended road extracted by the extraction means in a different manner from the recommended road, and displays the map acquired by the map information acquisition means on the display screen. Item 4. The map display device according to any one of items 1 to 3. The setting means sets a road to be highlighted on the display screen among the recommended road, the inaccessible road and the non-recommended road,
The map display device according to claim 4, wherein the display control unit displays an image in which the road set by the setting unit is emphasized.   When the condition set by the setting means is set to a road having a width wider than the vehicle width of the moving body by a predetermined width or more, the extracting means determines the moving body from information on the moving body as an item corresponding to the condition. The width of the vehicle is acquired from the information on the road, and if the width of the road is larger than the vehicle width of the moving body by a predetermined width or more, the road is extracted as a recommended road. The map display apparatus as described in any one of -5. A map display method for displaying a map used to support movement of a moving object on a display screen,
A mobile body information acquisition step of acquiring information about the mobile body;
A map to be displayed on the display screen, and a map information acquisition step for acquiring information on roads on the map;
A recommended road recommended as a road to be used for the movement of the mobile body based on the information on the mobile body acquired by the mobile body information acquisition step and the information on the road on the map acquired by the map information acquisition step. An extraction process to extract;
A display step of highlighting the recommended road of the mobile body extracted by the extraction step and displaying the map acquired by the map information acquisition step on the display screen;
The map display method characterized by including.   A map display program for causing a computer to execute the map display method according to claim 7.   A recording medium in which the map display program according to claim 8 is recorded in a computer-readable manner.

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