JP2004125529A - Apparatus and method for providing route return information in navigation, and program for provision - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for providing route return information in navigation and a program for presentation, capable of providing information on roads unreturnable to a computed route at the display of the computed route on a screen. <P>SOLUTION: The apparatus for providing route return information in navigation is provided with a route-computing part 42 for computing a route for reaching a destination; a display part 10 for displaying a map; a route-determining part 45 for determining whether a road on the map is the computed route; a display control part 43 for displaying the road determined as the computed route on the display part 10, in such a way as to be discriminated from other roads; a returnability determining part 46 for determining whether a motor vehicle which has entered a road determined as not the computed route can return to the computed route; and a distinguishable display control part 47 for displaying the roads determined as unreturnable roads, by the returnability determining part 46 on the display part 10, in such a way as to be distinguished from other roads. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a navigation technology, and more particularly, to a route return information presenting apparatus and method for navigation that can provide information on whether or not a route can be returned to a route other than a calculated route, and a presentation program.
[0002]
[Prior art]
2. Description of the Related Art In recent years, with the advance of digital technology, a navigation technology for guiding a mobile object such as a car has become widespread. For example, an in-vehicle navigation system records map data, route data indicating a road connection relationship on a map, etc. in a recording medium such as a CD-ROM or a DVD-ROM in advance, and stores these map data and route data. Search and set the optimal route to the given destination by calculation based on the, and scroll the map around the vehicle position calculated in real time by GPS navigation etc. It provides directions such as turning left and right.
[0003]
On this display screen, for example, as shown in FIG. 13, on the map screen, the road of the calculated route is displayed in a different color from other roads, or displayed as a line thicker than other roads. In this way, the calculated route can be recognized at a glance. In addition, there is a related art in which a reference route and a guide route can be accurately distinguished and recognized according to traffic regulations (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2000-337901 A (page 4-5, FIG. 4)
[0005]
[Problems to be solved by the invention]
By the way, when the user's vehicle travels along the calculated route, the route may be congested. In such a case, the user looks at the screen of the display device, and if there is a road on the displayed map that is likely to be a shortcut, removes the vehicle from the calculated route and travels on the road that is likely to be a shortcut. The route may be changed so that However, there is a possibility that a road that deviates from the route in such a manner may actually be unable to return to a previously calculated route due to traffic restrictions such as prohibition of right and left turns and a grade separation.
[0006]
For example, as shown in FIG. 14, it is assumed that link data including links (lines) connecting nodes (points) such as ABC is represented as links ABC. At this time, in the link ABF that is the calculated route, the link AB may be congested. In this case, even if the user intends to take a shortcut to pass through the link ADCF, and keeps the vehicle on the route of the link AD and continues running, the link EF has a three-dimensional intersection with the route of the link BF. Then, it cannot return to the calculated route.
[0007]
The present invention has been proposed to solve the above-described problems of the related art, and an object of the present invention is to display information on a road that cannot return to a calculated route when displaying the calculated route on a screen. It is an object of the present invention to provide an apparatus and method for presenting route return information in navigation and a program for presentation that can provide the information.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 provides a map information storage means for storing map information including map data and route data corresponding to a road on a map, wherein the moving object moves from the starting point to the destination. A route calculating means for calculating a route to be reached based on the route data; a display means for displaying a map based on the map data; and a road on a map displayed on the display means, wherein the calculated route is A computer that includes: a route determination unit that determines whether or not the road is determined by the route determination unit; and a display control unit that causes the display unit to display a road determined as a calculated route by distinguishing the road from other roads. In the route presentation device for navigation, the map information includes route return-related information related to whether or not the vehicle can return to the calculated route when a moving object enters each road. And determining, based on the route return-related information, whether or not the moving body that has entered the road determined to be not the calculated route by the route determination means can return to the calculated route. The computer comprises: a return permission / non-permission determination unit; and a distinction display control unit configured to display the road determined to be unreturnable by the return permission / rejection determination unit on the display unit so as to be distinguished from another road. And
[0009]
The invention according to claim 3 is an invention in which the invention according to claim 1 is grasped from the viewpoint of a method, wherein a computer which stores map information including map data and route data corresponding to a road on a map in advance stores the route information on the route. Based on the data, a procedure for calculating a route for the moving body to reach the destination from the departure point, a procedure for determining whether the road on the map is the calculated route, and a map based on the map data And displaying the road determined as the calculated route separately from the other roads in the navigation. In the route presentation method in navigation, the map information includes a calculation when a moving object enters each road. For a road determined to be not a calculated route, a moving body that has entered the calculated route includes route return related information related to whether or not the route can be returned to the calculated route. The computer executes a procedure for determining whether or not it is possible to return to the road based on the route return-related information and a procedure for displaying a road determined to be unreturnable separately from other roads. Features.
[0010]
A sixth aspect of the present invention is obtained by capturing the first and third aspects of the present invention from the viewpoint of a computer program, and stores map information including map data and map information including route data corresponding to roads on the map. Route calculation means for calculating a route for the moving body from the departure point to the destination based on the route data; and path determination means for determining whether or not the road on the map is the calculated route. A route presenting a route determined as a route calculated by the route determining means, together with a map based on the map data, as display means for displaying a display distinguished from other roads, for displaying a route in navigation for causing a computer to function. In the program, the map information includes a route return related to whether or not it is possible to return to the calculated route when a moving object enters each road. Information is included, and for a road determined to be not the route calculated by the route determination means, whether or not the moving body that has entered the road can return to the calculated route is determined based on the route return related information. Determining that the computer can function as distinction display control means for displaying the road determined to be unreturnable by the return permission / non-permission determination means on the display means in distinction from other roads. Features.
[0011]
According to the above-described inventions of claims 1, 3 and 6, the calculated route is distinguished from other road indications, and the calculation is performed when a moving object enters a road other than the calculated route. Even for a road that cannot return to the route, its display is distinguished from other roads, so that a user who has seen this can avoid entering the road in advance.
[0012]
According to a second aspect of the present invention, in the navigation route presenting apparatus according to the first aspect, it is determined whether or not the road determined by the return determination unit is connected to the route calculated by the route calculation unit. The computer is provided with connection determination means for determining based on the route data.
[0013]
According to a fourth aspect of the present invention, in the route presenting method in navigation, the map information includes route return-related information relating to whether or not a calculated route can be returned when a moving object enters each road. A procedure for determining, based on the route data, whether or not a road included and not determined to be the calculated route is connected to the calculated route; and determining that the road is connected to the calculated route. The procedure for determining whether or not the moving body that has entered the recovered road can return to the calculated route based on the route return-related information, And a step of displaying the road separately from the road.
According to the second and fourth aspects of the present invention, the road connected to the calculated route is highly likely to be selected by the user as a short-cut route or a detour route, but the road cannot be returned to the route. Since the road is distinguished and displayed when it is an unusual road, it is possible to more reliably prevent the vehicle from entering an unrecoverable road.
[0014]
According to a fifth aspect of the present invention, in the route presenting method in navigation, the map information includes route return related information related to whether or not the vehicle can return to the route when a moving object enters each road. A procedure for determining whether or not the road that is not the route is connected to the route based on the route data; and a road that is connected to the road that is determined not to be connected to the route, A step of determining whether or not the road can be returned to the route based on the route return related information; and a case in which a road connected to a road that is not connected to the route cannot be returned to the route. A step of displaying a road that is not connected to the route separately from other roads, and a process that allows a road that is connected to a road that is not connected to the route to return to the route. When it is determined that the road is not connected to the route, it is determined whether or not it is possible to enter a road that can return to the route based on the route data. When it is determined that it is not possible to enter a road that can return to the route from the road, the computer executes a procedure of displaying a road that is not connected to the route and distinguishing the road from other roads. And
[0015]
In the fifth aspect of the present invention, the vehicle is not connected to a route, and is not connected to a road that can return to the route, or is connected to a road that can return to the route. Is also displayed separately from other roads, so that even if the user is running off the route, it is possible to prevent the user from entering the road that cannot return to the route on the way. .
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention (hereinafter, referred to as “embodiments”) will be specifically described with reference to the drawings. The present embodiment can be grasped as a route return information presenting apparatus in navigation, a method and a program for realizing the same, and a recording medium on which the program is recorded.
[0017]
Further, the present embodiment can be realized by controlling the computer with software including programs and data.However, in this case, the manner of realizing the hardware and software can be variously changed. A virtual circuit block that realizes each function of the embodiment is used.
[0018]
[1. Constitution〕
The present embodiment implements the present invention in a navigation device (hereinafter, referred to as “present device”) of the present invention, a navigation method executed on the present device, and navigation software. Further, the present embodiment can be understood as a recording medium such as a CD-ROM, a DVD-ROM, a flash memory, a ROM chip package, and a hard disk in which such software is recorded. Downloading the program to a recording medium of a navigation device of each vehicle via a communication network such as a network and executing the program is also included as an embodiment.
[0019]
[1-1. overall structure〕
First, the present device includes the following elements shown in the functional block diagram of FIG. In other words, the absolute position / azimuth detecting unit 1 calculates, for example, the absolute position coordinates and the azimuth on the ground surface of the current position of the vehicle (referred to as the own vehicle) on which the present device is mounted, that is, the own vehicle position. , For receiving GPS radio waves transmitted from GPS satellites with an antenna or a receiver. The relative azimuth detecting unit 2 is a part for detecting a relative azimuth of the own vehicle using a gyro or the like. The vehicle speed detection unit 3 is a part that calculates the speed of the own vehicle by processing a vehicle speed pulse obtained from the vehicle.
[0020]
The main CPU and its peripheral circuit 4 are parts that serve as a control circuit for controlling the entire device. The memory group M is various memories necessary for the operation of the present apparatus. For example, the ROM 5 for storing a program is accessed by the main CPU when the present apparatus is started. A main program is loaded into a dynamic RAM (DRAM) 6 that provides a work area or the like. The SRAM 7 for backing up information such as settings is backed up by a battery even when the main power is off, and provides memory contents when it is turned on. In the display VRAM 8, bitmap data of an image to be displayed on the display unit 10 is drawn.
[0021]
The input unit 9 is a part for the user to input information such as a command, a spot name, a nickname, and the like from a switch or a microphone. The input unit 9 specifies a specific position on a map or selects an item of a menu or a list. Or inputting a command word or the like registered in advance by voice. The display unit 10 is a unit that outputs various information such as a map and an operation menu to a display screen. The touch panel provided on the display unit 10 also functions as the input unit 9. The voice output unit 11 is a part that outputs information on route guidance and operation menus by voice synthesis and the like.
[0022]
The CD / DVD-ROM control unit 12 is a means for reading various information recorded on a CD-ROM or a DVD-ROM, and is a means for storing in advance map information indicating where and what roads and facilities are located. It is. Such map information includes, for example, map data including a road, route data for calculating an optimal route from a current position to a destination, data for point search such as position coordinates, an icon (current position mark, (Including landmarks), character data for displaying menus, lists, and the like, image data, and the like.
[0023]
The route data is mainly composed of nodes (points) and links (lines), and describes the connection relations of the nodes and links based on the ID numbers assigned to the respective nodes. For example, as shown in FIG. 2, it is assumed that the link ID [1] is connected to the link IDs [2], [3], and [4] via the node ID [1]. At this time, although it is possible to enter the link [1] → [2], [1] → [3], if it is not possible to enter the link [1] → [4] due to traffic regulation, a grade separation, etc., FIG. Prepare route data as shown.
[0024]
The FM multiplex reception and processing unit 13 is a part that performs processing for receiving FM broadcast waves and extracting desired data such as VICS service traffic information from the broadcast waves, and the traffic information includes congestion information. The optical / radio wave beacon receiving and processing unit 14 is a unit that receives and processes information such as identification information of each beacon and traffic information of a VICS service from an optical beacon or a radio beacon installed on a road shoulder or the like. Further, the voice recognition unit 12 converts words such as command words, spot names, and nicknames from the input utterance of the user into an information format suitable for collation, and determines whether or not the word matches the collation data registered in advance. This part performs voice recognition.
[0025]
[1-2. Role of main CPU and its peripheral circuits]
Further, the main CPU and its peripheral circuit 4 are configured to play the following functions shown in FIG. That is, the current position calculation unit 40 is means for calculating the current position of the own vehicle, that is, the own vehicle position. Specifically, the current position calculation unit 40 calculates the own vehicle position by combining GPS navigation positioning and autonomous navigation positioning. It is configured as follows.
[0026]
Here, in the GPS navigation positioning, the current position is calculated using information obtained from the absolute position / azimuth detecting unit 1 based on radio waves from artificial satellites. In the autonomous navigation positioning, the current position is calculated using information obtained from the relative azimuth detecting unit 2 and the vehicle speed detecting unit 3 based on the geomagnetism and the speed of the own vehicle.
[0027]
The destination specifying unit 41 is a specifying unit that specifies a facility as a destination from the facilities included in the map information. The route calculation unit 42 is a unit that calculates and sets a route to the destination specified by the destination specification unit 41 from the current position of the vehicle calculated by the current position calculation unit 40. In addition, a departure place designating part for designating a departure place may be provided separately from the own vehicle position, and a route from an arbitrary departure place inputted by the user through the input part 9 to the destination may be calculated. The display control unit 43 is a unit that causes the display unit 10 to display a display necessary for navigation, such as a map including roads, icons, menus, and lists (including drawing processing on the VRAM 8). The display control unit 43 according to the present embodiment has a function of distinguishing the calculated route from other roads and displaying the calculated route by color coding or a bold line. The guidance control unit 44 is a unit that generates and outputs an instruction for performing road guidance by screen display or synthesized voice based on the set route.
[0028]
The route determination unit 45 is a unit that determines whether a displayed road is a calculated route. The return possibility determination unit 46 is a unit that determines, based on the route data, whether or not the road determined to be not a route by the route determination unit 45 can be returned to the route when entering the road. The distinction display control unit 47 is a unit that generates a display that distinguishes the road determined to be unrecoverable by the return possibility determination unit 46 from other roads and displays the display on the display unit 10. Further, the connection determination unit 48 is a unit that determines the connection relationship between the roads based on the route data. For example, it can be determined whether the displayed road is connected to the calculated route, whether the displayed road is connected to the road connected to the calculated route, and the like.
[0029]
[2. Action)
The operation of the present embodiment as described above will be described. First, in the present embodiment, the destination designation unit 41 calculates the vehicle position calculated by the current position calculation unit 40 based on information from the absolute position / direction detection unit 1, the relative direction detection unit 2, and the vehicle speed detection unit 3. The route calculation unit 42 calculates and sets the optimal route to the designated destination based on the route data, and the display control unit 43 displays the map on the display unit 10 based on the map data according to the instruction of the guidance control unit 44. It has a function as a normal navigation device that guides the user with a screen to be displayed and voice output by the voice output unit 11 based on the synthesized voice data.
[0030]
[Route display processing]
When performing the above navigation, the display control unit 43 reads a map near the own vehicle position including the road and draws the map on the VRAM 8, but the route calculated by the route calculation unit 42 is different from other roads. Draw so that they can be distinguished. For example, as shown in FIGS. 4 and 5, the drawing process is performed so that the calculated route to be drawn is displayed as a thick line. The procedure of the display process will be described with reference to the flowchart of FIG. This display processing flow is called and executed by a command from the guidance control unit 44 instructing updating of the screen display and the like. First, the display control unit 43 performs an operation necessary for displaying the designated image (step 601), and stores necessary data based on the operation result in an external storage such as the CD / DVD-ROM control unit 12 or the like. The data is read from the device onto the memory (DRAM 6) in the navigation device (step 602). Then, by drawing on the memory (VRAM 8) (Step 603), the updated screen is displayed on the display unit 10 (Step 604).
[0031]
Step 603 in the display processing flow as described above includes processing for displaying the route separately from other roads. The details will be described with reference to the flowchart of FIG. That is, the route determination unit 45 searches the route data read into the DRAM 6 and checks whether there is a road to be drawn on the map (step 701). If all roads have been drawn, the flow ends. If there is a road to be drawn, the route determination unit 45 determines whether the link corresponding to the road to be drawn is a link included in the calculated route (step 702). If it is determined that the route is included in the calculated route, the display control unit 43 performs drawing to distinguish the route from other roads (step 703). For example, as shown in FIG. 4 and FIG. If the link is determined not to be included in the calculated route, the road is drawn normally (step 705). After the above-described drawing processing, the drawing target is shifted to the road to be drawn next (step 704).
[0032]
[Return impossible road display processing]
The process of step 705 includes a process of distinguishing and displaying a non-returnable route. The details will be described with reference to the flowchart of FIG. That is, when the link corresponding to the road to be displayed is a link that is not included in the calculated route, the connection determination unit 48 determines whether the link is connected to the calculated route based on the route data. (Step 801). If the link is established, the return possibility determination unit 46 determines whether or not the link can return to the route even if entering the link, that is, whether or not the link can enter the route, based on the route data (step 802). At this time, if it is determined that the link of interest is a link that can enter the route as shown in FIG. 9, the corresponding road is drawn as usual (step 803).
[0033]
If the link of interest is determined to be a link that cannot enter the route as shown in FIG. 10, the corresponding road is drawn separately from other roads (step 804). For example, the link DC is not connected to the link EF by displaying it with a dotted line as shown in FIG. 4 or by displaying it as an icon as shown in FIG. 5, and returns to the link EF when entering the link DC. You can show what you can't do.
[0034]
On the other hand, when it is determined in step 801 that the link of the road to be displayed is not connected to the route, the return possibility determination unit 46 allows the road connected to the link of interest to enter the route. It is determined whether the link is a link (step 805). If the link of interest is not connected to a link that can enter the route, the road corresponding to the link of interest is drawn differently from other roads as in FIGS. 4 and 5 (step 808). ). If it is determined that the link of interest is connected to a link that can enter the route, it is determined whether the link of interest can enter a link that can enter the route (step 806). As shown in FIG. 11, when it is determined that the link of interest can enter a link that can enter the route, the road corresponding to the link of interest is drawn as usual (step 807). As shown in FIG. 12, when it is determined that the link of interest cannot enter a link that can enter the route, the road corresponding to the link of interest is drawn separately from other roads (step S1). 808).
[0035]
As described above, a road that cannot enter the calculated route is displayed separately from other roads, and the user determines which road can be entered by looking at the road. In addition, on the screen of the display unit 10, not only roads that cannot enter the route are distinguished from other roads, but also the synthesized voice registered in advance is output by the voice output unit 11 in accordance with the instruction of the guidance control unit 44. By doing so, guidance may be provided by voice. The voice guidance may be performed when the vehicle approaches a road on which the calculated route cannot be entered by a predetermined distance. This allows the user to make an instantaneous determination so that the vehicle does not proceed on a road that cannot return to the route.
[0036]
[3. effect〕
According to the present embodiment as described above, the road that cannot enter the route is drawn separately from other roads, thereby preventing the user from trying to take an unnecessary short route by his own judgment and cannot return to the route. be able to. As a result, on a road that is likely to be a shortcut, the traffic volume is reduced.
[0037]
Also, the road connected to the calculated route is highly likely to be selected by the user as a short-cut route or a detour route when the route is congested or the like, but when the road is a road that cannot return to the route. , The vehicle can be more reliably prevented from entering an unrecoverable road.
[0038]
Further, roads that are not connected to a route and that are not connected to a road that can be returned to the route, or that are connected to a road that can be returned to the route but are not allowed to enter the road, Therefore, even when the user is traveling off the route, it is possible to prevent the user from entering a road that cannot return to the route on the way.
[0039]
[4. Other embodiments]
The present invention is not limited to the above embodiments. For example, by distinguishing and displaying only the roads that are connected to the route and cannot return to the route, the processing load can be reduced and the display processing can be speeded up. Further, the criterion for determining whether or not the vehicle can return to the route is not limited to the above-described example, and can be freely set. Accuracy can be assured by frequently updating the data as to whether or not it is possible to return to the route based on information such as road closures and under construction obtained from traffic information and the like. Regarding the mode of the road that is distinguished and displayed on the display screen, its color, thickness, line type, and the like can be freely set. The form can be freely set even when clearly specified by an icon or the like.
[0040]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the present invention as described above, when displaying a calculated route on a screen, a route return information presenting apparatus and method for navigation that can provide information on a road that cannot return to the calculated route, and a presentation program Can be provided.
[Brief description of the drawings]
FIG. 1 is a functional block diagram illustrating a configuration example of an embodiment of the present invention.
FIG. 2 is a conceptual diagram illustrating an example of a path connection relationship in the embodiment of FIG.
FIG. 3 is an explanatory diagram illustrating an example of route data corresponding to the route in FIG. 2;
FIG. 4 is a diagram illustrating an example of a display screen of a non-returnable route in the embodiment of FIG. 1;
FIG. 5 is a diagram illustrating an example of a display screen of a non-return route in the embodiment of FIG. 1;
FIG. 6 is a flowchart illustrating a flow of a screen display process in the embodiment of FIG. 1;
FIG. 7 is a flowchart showing a flow of a route display process in the embodiment of FIG. 1;
FIG. 8 is a flowchart showing the flow of a process of displaying a non-returnable route in the embodiment of FIG. 1;
FIG. 9 is a conceptual diagram illustrating an example of a link that is connected to a route and can enter the route.
FIG. 10 is a conceptual diagram illustrating an example of a link that is connected to a route but cannot enter the route.
FIG. 11 is a conceptual diagram illustrating an example of a link that is not connected to a route but is connected to a link that can enter the route.
FIG. 12 is a conceptual diagram illustrating an example of a link that is not connected to a route and is not connected to a link that can enter the route.
FIG. 13 is a diagram illustrating a screen display example of a calculated route in a conventional navigation device.
FIG. 14 is a diagram showing a case where a conventional navigation device enters a road that cannot return to a route.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Absolute position and direction detection part 2 ... Relative direction detection part 3 ... Vehicle speed detection part 4 ... Main CPU and its peripheral circuit 5 ... ROM
6 ... DRAM
7 ... SRAM
8 ... VRAM
9 Input unit 10 Display unit 11 Audio output unit 12 CD / DVD-ROM control unit 13 FM multiplex reception and processing unit 14 Optical / radio beacon reception and processing unit 15 Voice recognition unit 40 Current position calculation Unit 41 destination designation unit 42 route calculation unit 43 display control unit 44 guidance control unit 45 route determination unit 46 returnability determination unit 47 distinguishable display control unit 48 connection determination unit

Claims (6)

Map information storage means for storing map data and map information including route data corresponding to roads on the map, and a route for calculating a route for the moving body from the starting point to the destination based on the route data Calculation means, display means for displaying a map based on the map data, road determination means for determining whether or not a road on a map displayed on the display means is a calculated route, and Display control means for displaying the road determined to be the calculated route on the display means in distinction from other roads, in an information providing apparatus for navigation provided by a computer,
The map information includes route return related information related to whether or not it is possible to return to the calculated route when the moving body enters each road,
Whether or not a moving body that has entered the road determined to be not the calculated route by the route determining means can return to the calculated route based on the route return related information. Determining means;
A road that is determined to be unreturnable by the return possibility determination unit, a distinction display control unit that causes the display unit to display the road separately from other roads,
An apparatus for presenting route return information in navigation, comprising the computer. The computer may further include a connection determination unit configured to determine whether the road determined by the return possibility determination unit is connected to the route calculated by the route calculation unit based on the route data. The route return information presenting device in navigation according to claim 1. A computer in which map data and map information including route data corresponding to roads on the map are stored in advance, based on the route data, a procedure for calculating a route for the moving body from the starting point to the destination, A step of determining whether or not the road on the map is a calculated route; and a step of displaying, along with the map based on the map data, the road determined as the calculated route separately from other roads. In the information presentation method in navigation,
The map information includes route return related information related to whether or not it is possible to return to the calculated route when the moving body enters each road,
For a road determined not to be the calculated route, a procedure for determining whether or not the moving body that has entered the route can return to the calculated route based on the route return related information;
Displaying a road determined to be unreturnable separately from other roads,
A method for presenting route return information in navigation, the method being executed by the computer. A computer in which map data and map information including route data corresponding to roads on the map are stored in advance, based on the route data, a procedure for calculating a route for the moving body from the starting point to the destination, A step of determining whether or not the road on the map is a calculated route; and a step of displaying, along with the map based on the map data, the road determined as the calculated route separately from other roads. In the information presentation method in navigation,
The map information includes route return related information related to whether or not it is possible to return to the calculated route when the moving body enters each road,
A step of determining, based on the route data, whether or not the road determined to be not the calculated route is connected to the calculated route;
For a road determined to be connected to the calculated route, a procedure for determining whether or not the moving body that has entered the route can return to the calculated route, based on the route return related information,
Displaying a road determined to be unreturnable separately from other roads,
A method for presenting route return information in navigation, the method being executed by the computer. A computer in which map data and map information including route data corresponding to roads on the map are stored in advance, based on the route data, a procedure for calculating a route for the moving body from the starting point to the destination, Navigation for executing a procedure for determining whether or not a road on a map is the calculated route, and a procedure for displaying, along with a map based on the map data, the road determined as the route separately from other roads In the information presentation method in
The map information includes route return related information related to whether or not the vehicle can return to the route when a moving object enters each road,
A step of determining whether or not the road other than the route is connected to the route based on the route data;
A step of determining, based on the route return-related information, whether a road connected to the road that is determined not to be connected to the route is a road that can return to the route;
A road connected to a road that is not connected to the route, when it is determined that it is not possible to return to the route, a procedure that displays the road that is not connected to the route, distinguished from other roads,
When it is determined that a road connected to a road that is not connected to the route can return to the route, whether a road that is not connected to the route can enter a road that can return to the route. Determining, based on the route data,
From a road not connected to the route, when it is determined that it is not possible to enter a road that can return to the route, a road that is not connected to the route, and a procedure to display the road separately from other roads,
A method for presenting route return information in navigation, the method being executed by the computer. Map information storage means for storing map data including map data and route data corresponding to roads on the map; and a route for calculating a route for the moving body from the starting point to the destination based on the route data. Calculating means, a route determining means for determining whether or not the road on the map is a calculated route, and a map based on the map data as well as the road determined as the route calculated by the route determining means, As a display means for displaying a display distinguished from the road, in the information presentation program in navigation for making the computer function,
The map information includes route return related information related to whether or not it is possible to return to the calculated route when the moving body enters each road,
For a road determined to be not a route calculated by the route determination means, a determination as to whether or not a moving body that has entered the road can return to the calculated route based on the route return-related information. Means,
As a distinction display control means for displaying the road determined to be unrecoverable by the return possibility determination means on the display means in distinction from other roads,
A program for presenting route return information in navigation, wherein the program causes the computer to function.

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