JP2021156803A - Road display system and road display program - Google Patents

Abstract

To enhance the possibility of proper guidance.SOLUTION: A road display system includes: an acquisition part for acquiring road information on a road section; and a display processing part in which a first line along a first road section and a second line along a second road section are colored and displayed on the basis of the road information, and, in an intersection range including the intersection connected to the first road section and the second road section, a third line connecting the first line and the second line is colored with colors determined on the basis of the colors of the first line and second line and displayed on a display part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a road display system and a road display program.

Guidance systems that display the travel route of a vehicle are known. The guidance system acquires road information such as traffic congestion information and provides guidance according to the road information. Patent Document 1 discloses a technique of drawing a road on a three-dimensionally displayed map in colors according to the degree of traffic congestion according to the traffic congestion information.

JP-A-2002-90156

However, in a guidance system, for example, in an intersection, linear data connecting two links connecting to a node may be generated. Since road information such as traffic jam information is not defined for such linear data, it exists in the traffic jam information when the road is colored and displayed in a color corresponding to the traffic jam information based on the traffic jam information. There is a problem that roads corresponding to non-linear data cannot be colored.

The present invention has been made in view of the above problems, and an object of the present invention is to increase the possibility of providing guidance according to road information even in a range on a road that is not associated with road information.

In order to achieve the above object, the road display system of the present invention has an acquisition unit that acquires road information related to a road section, and a first line and a second road along the first road section based on the road information. The second line along the section is colored and displayed, and the third line connecting the first line and the second line in the intersection range including the intersection connecting to the first road section and the second road section is described as described above. It has a display processing unit that is colored with a color determined based on the colors of the first line and the second line and displayed on the display unit.

Further, in order to achieve the above object, the road display program of the present invention uses a computer as an acquisition unit for acquiring road information related to a road section, and a first road along the first road section based on the road information. The line and the second line along the second road section are colored and displayed, and the first line and the second line are connected in the intersection range including the intersection connecting to the first road section and the second road section. This is a road display program for coloring the third line with a color determined based on the colors of the first line and the second line and causing the third line to function as a display processing unit to be displayed on the display unit.

The road display system and the road display program color and display the first line along the first road section and the second line along the second road section. The road display system and the road display program further include the third line connecting the first line and the second line in the intersection range including the intersection connecting to the first road section and the second road section of the first line and the second line. It is colored with a color determined based on the color and displayed on the display unit. Therefore, even when the road information corresponding to the third line does not exist, the third line can be colored and displayed in an appropriate color. That is, it is possible to increase the possibility of providing appropriate guidance even for a range on the road that is not associated with the road information.

It is a block diagram which shows the structure of the road display system. FIG. 2A is a diagram showing a display example of a traveling route on a 2D map. FIG. 2B is a diagram showing a display example of a traveling route on a 3D map. FIG. 3A is a diagram schematically showing linear data. FIG. 3B is a diagram schematically showing a traveling route. It is a flowchart which shows the road display processing.

Here, embodiments of the present invention will be described in the following order.
(1) Road display system configuration:
(2) Road display processing:
(3) Other embodiments:

(1) Road display system configuration:
FIG. 1 is a block diagram showing the configuration of the road display system 10. The road display system 10 includes a control unit 20 including a CPU, RAM, ROM, and the like, and a recording medium 30. The control unit 20 can execute various programs stored in the recording medium 30 or the ROM. The control unit 20 of the present embodiment can execute the road display program 21 as one of the programs. The control unit 20 can guide the traveling route of the vehicle by processing the road display program 21.

The recording medium 30 stores the map information 31. The map information 31 includes 2D (two-dimensional) map information and 3D (three-dimensional) map information. The map information includes node data indicating the position of the node corresponding to the end point of the road section, the position of the shape interpolation point for specifying the shape of the road between the nodes, etc. as information common to the 2D map information and the 3D map information. It includes shape interpolation point data to be shown, link data to show links connecting nodes, and the like. Here, the node corresponds to the intersection, and the link corresponds to the road section from the intersection to the intersection. The map information 31 is used for identifying the position of a vehicle, searching for a route to a destination, guiding a route, and the like. In the present embodiment, the link data includes information indicating the direction in which the vehicle can travel on the road section indicated by the link data. In addition, the link data includes information indicating the structure of the lane existing on the road. The lane structure indicates the number of lanes in which the vehicle can travel and the width of the lane in each of the traveling directions. When the number of lanes changes in a part of the road section (for example, the part immediately before entering the intersection), information indicating the changing position and the number of lanes before and after the change is defined. Map information 31 further includes building information. Here, the building information is polygonal information indicating the position, size, and shape of the building in the 2D map information, and is expressed by combining two-dimensional polygons (for example, triangles) specified by the positions of the vertices. NS. In 3D map information, building information is three-dimensional shape information indicating the position, size, and shape of a building, and is expressed by combining three-dimensional polygons (for example, triangles) specified by the position and height of vertices. NS.

The vehicle is further equipped with a GNSS receiving unit 41, a vehicle speed sensor 42, a gyro sensor 43, a user I / F unit 44, and a communication unit 45. The GNSS receiving unit 41 is a device that receives signals from the Global Navigation Satellite System. The GNSS receiving unit 41 receives radio waves from the navigation satellite and outputs a signal for calculating the position of the vehicle via an interface (not shown). The control unit 20 acquires this signal to acquire the position of the vehicle. The vehicle speed sensor 42 outputs a signal corresponding to the rotational speed of the wheels provided in the vehicle. The control unit 20 acquires this signal via an interface (not shown) to acquire the vehicle speed. The gyro sensor 43 detects the angular acceleration for turning in the horizontal plane of the vehicle and outputs a signal corresponding to the direction of the vehicle. The control unit 20 acquires this signal and acquires the traveling direction of the vehicle. The vehicle speed sensor 42, the gyro sensor 43, and the like are used to identify the traveling track of the vehicle. In the present embodiment, the control unit 20 specifies the position of the vehicle based on the starting point and the traveling track of the vehicle, and the position of the vehicle specified based on the starting point and the traveling track is determined by the GNSS receiving unit 41. Correct based on the output signal.

The user I / F unit 44 is an interface unit for inputting a user's instruction and providing various information to the user, and includes a touch panel type display unit (not shown), a switch, a speaker, and the like. That is, the user I / F unit 44 includes an image and audio output unit and an input unit for instructions by the user. The communication unit 45 is a device for wirelessly communicating with an external device, and the control unit 20 can communicate with the distribution server 50 via the communication unit 45. The distribution server 50 distributes congestion information. The distribution server 50 distributes, for example, VICS (registered trademark) (Vehicle Information and Communication System) information as congestion information. The traffic jam information is traffic information that indicates the degree of traffic jam for each link as the degree of traffic jam.

The road display program 21 executed by the control unit 20 of the road display system 10 includes an acquisition unit 211 and a display processing unit 212 in order to guide the traveling route of the vehicle. The acquisition unit 211 is a program module that allows the control unit 20 to realize a function of acquiring traffic congestion information from the distribution server 50 via the communication unit 45.

The display processing unit 212 is a program module that causes the control unit 20 to execute a function of displaying a map or the like based on the current location of the vehicle on the display unit. The control unit 20 controls to display the traveling route by the function of the display processing unit 212. The control unit 20 can switch between the 2D (two-dimensional) map and the 3D (three-dimensional) map according to the user operation, or display them at the same time. In drawing a 3D map, the control unit 20 determines a viewpoint position, a line-of-sight direction, and a projection plane in a three-dimensional space, and draws a road, a building, or the like on the projection plane. FIG. 2A is a diagram showing a display example when a traveling route including an intersection is displayed on a 2D map. FIG. 2B is a diagram showing a display example when a traveling route corresponding to the 2D map shown in FIG. 2A is displayed on the 3D map. As shown in FIG. 2A, in the 2D map, the route corresponding to the link 201 which is the first road section, the link 202 which is the second road section, and the node 203 is displayed as the traveling route 210. The node 203 is connected to the link 201 and the link 202. On the other hand, in the 3D map display, a curve that reproduces the course of the vehicle is drawn as a traveling path 220 in the intersection. Therefore, the traveling route 220 includes routes that do not correspond to the links 201 and 202 and the node 203.

The routes that are included in the travel route 200 and do not correspond to the links 201 and 202 and the nodes will be described. FIG. 3A is a diagram schematically showing linear data 300 used when displaying a 3D map. The linear data 300 is data referred to when drawing a traveling route. The linear data 300 shown in FIG. 3A corresponds to the traveling path 220 shown in FIG. 2B. As shown in FIG. 3A, the linear data 300 includes a first path line 301 along the link 201 and a second path line 302 along the link 202.

When the travel route in the order of the link 201, the node 203, and the link 202 is set, the control unit 20 identifies the approach lane to the intersection corresponding to the node 203 based on the link 201, and further based on the link 202. Then, the exit lane from the intersection corresponding to the node 203 is specified. Then, the control unit 20 generates center lines in the lane width direction of the approach lane and the exit lane as the first route line 301 and the second route line 302, respectively. Further, the control unit 20 connects the first end point 3011 which is the intersection of the boundary between the first route line 301 and the intersection range 250 to the second end point 3021 which is the intersection of the boundary between the second route line 302 and the intersection range 250. The curve is generated as the third path line 303. The third path line 303 is a curve that is convex toward the obtuse angle side of the intersection when the first path line 301 and the second path line 302 are extended, and is a curve that passes outside the node 203. The intersection range 250 is an area where the link 201 and the link 202 overlap when the road widths of the link 201 and the link 202 are taken into consideration. That is, the intersection range 250 is a rectangular area in which the link 201 and the link 202 are on one side and the center is the node 203. Then, the control unit 20 obtains a line segment connecting the first path line 301, the third path line 303, and the second path line 302 as linear data 300.

When the control unit 20 generates the linear data 300, the control unit 20 displays the traveling path 220 along the shape of the linear data 300 as shown in FIG. 2B. FIG. 3B is a diagram schematically showing a traveling path 220. On the traveling route 220, the first line 311 drawn according to the first route line 301, the second line 312 drawn according to the second route line 302, and the third line 303 drawn according to the third route line 303 are drawn. The third line 313 and the like are included. Here, the first line 311 and the second line 312 correspond to the link 201 and the link 202, respectively, but the third line 313 does not correspond to any of the links. That is, the third line 313 of the traveling route 220 is a route in the intersection that does not correspond to the links 201 and 202. On the other hand, in the traffic jam information, the degree of traffic jam is shown for each link as described above. That is, the third line 313 is a route in which the information corresponding to the congestion information does not exist.

In the following, the process of coloring and displaying the route in the intersection, which does not correspond to the link, will be described by taking the third line 313 as an example. When the traffic jam information is received, the control unit 20 controls the display processing unit 212 so that the travel route is colored and displayed in a color corresponding to the traffic jam degree shown in the traffic jam information. In the present embodiment, it is assumed that two levels of traffic congestion, "traffic jam" and "vacant road", are set in the traffic jam information. The control unit 20 displays the line indicating the route with the degree of congestion of "congestion" in red, and the line indicating the route with the degree of congestion of "vacant road" in green. When the link 201 and the link 202 are included in the traveling route, the control unit 20 congests the first line 311 along the link 201 and the second line 312 along the link 202 as shown in FIG. 3B. Color and display based on information. For example, when the congestion degree of the link 201 is "congestion" and the congestion degree of the link 202 is "vacant road", the first line 311 is colored in red and the second line 312 is colored in green. NS. That is, the first line 311 and the second line 312 are colored with colors according to the degree of congestion. In this way, the control unit 20 colors the first line 311 along the first road section and the second line 312 along the second road section based on the traffic jam information by the function of the display processing unit 23. indicate.

In the congestion information, since the congestion degree is assigned to each link, the control unit 20 determines that the first line 311 and the second line 312 corresponding to the link are based on the congestion degree of the corresponding link. The color can be determined. However, in the traffic jam information, there is no information on the degree of traffic jam corresponding to the third line 313. Therefore, the control unit 20 cannot color the third line 313 with reference to the traffic jam information.

Therefore, the control unit 20 colors the third line 313 with a color determined based on the colors of the first line 311 and the second line 312 and displays it on the display unit. More specifically, with respect to the third line 313, when the colors of the first line 311 and the second line 312 are the same, the control unit 20 sets the third line 313 as the first line 311 and the second line 312. Colored and displayed in the same color as. On the other hand, when the colors of the first line 311 and the second line 312 are different, the control unit 20 colors the third line 313 with a color between the color of the first line 311 and the color of the second line 312. To display. The color between the color of the first line 311 and the color of the second line 312 is a color such that the value of hue, lightness and saturation is a value between the color of the first line 311 and the color of the second line 312. And it is assumed that it is set in advance. For example, as described above, when the first line 311 is red and the second line 312 is green, the third line 313 may be colored and displayed in yellow, which is a color between these colors. When the first line 311 is white and the second line 312 is black, the third line 313 may be colored in gray. The intermediate color may have at least one of hue, lightness and saturation having a value between the color of the first line 311 and the color of the second line 312. In this case, the hue, lightness and saturation The remaining values may be the values of the first line 311 or the second line 312.

As described above, when the road display system 10 of the present embodiment displays the 3D map, the third line 313 corresponding to the route in the intersection that does not exist in the traffic jam information also corresponds to the link existing in the traffic jam information. It can be colored and displayed with a color based on the colors of the first line 311 and the second line 312. Further, the road display system 10 colors and displays the color of the third line 313 with a color between the color of the first line 311 and the color of the second line 312. That is, the road display system 10 can display the third line 313 in a color corresponding to the degree of congestion of the adjacent link. As a result, the road display system 10 can increase the possibility of providing appropriate guidance even for a route that does not exist in the traffic jam information.

(2) Road display processing:
Next, the road display process executed by the road display program 21 will be described. FIG. 4 is a flowchart showing the road display process. The road display process is a process executed when a route search is performed in the road display system 10 and a 3D map is displayed during route guidance along the travel route obtained by the route search. The control unit 20 determines whether or not the congestion information has been received from the distribution server 50 by the function of the acquisition unit 211 (step S100). When the control unit 20 determines that the congestion information has been received (Y at 100), the control unit 20 specifies the congestion degree of the link corresponding to the traveling route being displayed by the function of the display processing unit 212 (step S105). For example, when the traveling route 220 shown in FIG. 2B is being displayed, the congestion degree of the link 201 and the link 202 corresponding to the traveling route 220 is specified.

Next, the control unit 20 determines the colors of the first line 311 and the second line 312 corresponding to the link 201 and the link 202, respectively, based on the congestion degree of each link by the function of the display processing unit 212 (. Step S110). In the example shown in FIG. 3B, when the congestion degree of the link 201 is specified as "congestion", the color of the first line 311 corresponding to the link 201 is determined to be red. When the congestion degree of the link 202 is specified as "vacant road", the color of the second line 312 corresponding to the link 202 is determined to be green.

Next, the control unit 20 determines whether or not there is a route that does not correspond to the link in the route being displayed by the function of the display processing unit 212 (step S115). Here, the route that does not correspond to the link is a route that corresponds to the line segment connecting the links in the intersection among the linear data indicating the traveling route, as shown in the third line 313 described with reference to FIG. 3B. Is. If there is no route that does not correspond to the link (N in step S115), the control unit 20 advances the process to step S125. When there is a route that does not correspond to the link (Y in step S115), the control unit 20 determines the color of the line corresponding to the route that does not correspond to the link based on the color of the line adjacent to the line (Y). Step S120). The control unit 20 determines, for example, the color of the third line 313 based on the colors of the first line 311 and the second line 312 which are adjacent to the third line. More specifically, when the first line 311 is red and the second line 312 is green, the color of the second line 312 is determined to be yellow.

Next, the control unit 20 controls to display the traveling route being displayed in a color determined according to the degree of traffic congestion (step S125). As shown in FIG. 3B, when the first line 311 and the second line 312 and the third line 313 are displayed as the traveling routes, the first line 311 and the second line 312 are colored with colors according to the degree of congestion. The display is performed, and the third line 313 is colored and displayed in a color determined based on the colors of the first line 311 and the second line 312. This completes the road display process.

(3) Other embodiments:
The above embodiment is an example for carrying out the present invention, and various other embodiments can be adopted. For example, the road display system 10 may be a system realized by a plurality of devices (for example, a client and a server, a control unit in a navigation device, a control unit in a user I / F unit, and the like). At least a part of the functions of the acquisition unit 211 and the display processing unit 212 constituting the road display system 10 may be divided into a plurality of devices and exist. Of course, some configurations of the above-described embodiments may be omitted, and the order of processing may be changed or omitted. For example, in the road display process, the color of the line corresponding to the link may be colored and then the color of the line not corresponding to the link may be determined.

In the present embodiment, the display of the 3D map has been described as an example, but even in the display of the 2D map, the road display process of the present embodiment is performed when the route corresponding to the link is displayed in the intersection displayed in 2D. Can be applied.

Further, in the present embodiment, the control unit 20 decides to color-display the road corresponding to the traffic congestion information for the route being guided, but the road to be colored is limited to the route being guided. It's not a thing. That is, the control unit 20 may color the road included in the displayed map according to the traffic jam information and display it.

The route that does not correspond to the link, that is, the color of the third line described in the embodiment may be determined based on the colors of the first line and the second line, and the processing for that purpose is not limited to the embodiment. No. As another example, the color of the third line may be the same as the color of either one of the first line and the second line. In this case, either color may be arbitrary or may be predetermined. For example, the color of the first line in front of the traveling direction may be determined as the color of the third line.

Further, it is assumed that the degree of congestion is defined in three stages, for example, "congestion", "congestion", and "vacant road". Further, in the case of "traffic jam", the route is colored in red, in the case of "crowded", the route is colored in orange, and in the case of "vacant road", the route is colored in green. In this case, when the colors of the first line and the second line are determined to be red and green corresponding to the congestion degrees "congestion" and "vacant road", respectively, the control unit 20 selects the color of the third line. , You may decide to use orange that corresponds to "congestion", which is the degree of congestion between "traffic jam" and "vacant road".

Further, when the first line and the second line are colored in different colors, the third line changes from the color of the first line to the color of the second line along the first line to the second line on the third line. It may be colored to change. Specifically, in the third line, a gradation, that is, a continuous color change may be performed along the first line to the second line. As another example, the third line may be colored so that the color changes stepwise along the first line to the second line. The number of stages in this case is not particularly limited.

The control unit 20 may color the first line and the second line based on the road information, and the road information is not limited to the traffic jam information. Here, the road information may be any information indicating the state of the road, and examples thereof include winter closures and chain restrictions. When the range of closed roads includes two links and nodes connecting them, the control unit 20 colors the route in the intersection corresponding to the node with a color determined based on the route color corresponding to the closed road link. And display it.

Further, for example, the road information may be information indicating the degree of congestion in the time-limited parking section or on-street parking. In this case, the control unit 20 colors and displays the parking section corresponding to the link on the road according to the degree of congestion, and displays the section in the intersection corresponding to the link according to the color of the parking section corresponding to the link. It may be colored and displayed in a different color.

Further, the system, program, and method as described above may be realized as a single device or may be realized by using a shared component in a plurality of devices, and include various aspects. In addition, some of them are software and some of them are hardware, which can be changed as appropriate. Further, the invention is also established as a recording medium for a program that controls a system. Of course, the recording medium of the program may be a magnetic recording medium or a semiconductor memory, and any recording medium to be developed in the future can be considered in exactly the same way.

10 ... Road display system, 20 ... Control unit, 21 ... Road display program, 30 ... Recording medium, 31 ... Map information, 50 ... Distribution server, 211 ... Acquisition unit, 212 ... Display processing unit

Claims (6)

Acquisition department that acquires road information related to road sections,
Based on the road information, the first line along the first road section and the second line along the second road section are colored and displayed, and the intersection connecting to the first road section and the second road section. In the intersection range including the above, the display processing unit that colors the third line connecting the first line and the second line with a color determined based on the colors of the first line and the second line and displays them on the display unit. Road display system to have. The road information is traffic information indicating the degree of traffic congestion on the road.
The first line and the second line are colored according to the degree of congestion.
The road display system according to claim 1. The road display system according to claim 1 or 2, wherein the first road section and the second road section are road sections included in a traveling route of a vehicle. The first line and the second line are colored in different colors.
The third line is colored so as to change from the color of the first line to the color of the second line along the second line from the first line on the third line. The road display system according to any one of the above. The first line and the second line are colored in different colors.
The road display system according to any one of claims 1 to 3, wherein the third line is colored with a color between the color of the first line and the color of the second line. Computer,
Acquisition department that acquires road information related to road sections,
Based on the road information, the first line along the first road section and the second line along the second road section are colored and displayed, and the intersection connecting to the first road section and the second road section. Functions as a display processing unit in which the third line connecting the first line and the second line is colored with a color determined based on the colors of the first line and the second line in the intersection range including the above and displayed on the display unit. Road display program to let you.

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