JP2523025B2 - Route information display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention reproduces road map information and route information for route guidance recorded in a recording medium and displays them on a display screen such as a CRT (cathode ray tube). It relates to the device.

(Prior Art) JP-A-62-82316 and JP-A-62-82318 (G01C 21/00) reproduce road map information from a recording medium and display it on a CRT installed around a driver's seat of a vehicle. It is disclosed that a map image such as a figure, a place name, etc. is displayed, and a starting point and a destination point are further inputted by an input device to synthesize a route image showing a route between both points with the map image to be displayed. ing.

This is the position coordinates of all intersections on the road map (hereinafter referred to as "nodes") on the recording medium, road information between nodes (hereinafter referred to as "links"), right / left turn prohibition for each node, and restrictions on one-way traffic etc. By inputting conditions such as road congestion, vehicle width regulation, etc. and specifying the starting point and the destination point, the route search means in the device calculates for each node in order from the starting point node until the destination point is reached. The calculation is repeated to select the shortest route.

(Problems to be Solved) When a route is searched by the above device, as the number of nodes increases, the number of combinations of nodes and links increases and the amount of calculation becomes enormous. Therefore, there is a problem that it takes a long time until the route is displayed on the screen of the CRT after the start point and the destination point are indicated by the input device.

Further, even if the shortest route can be displayed, a more complicated route may be generated, which may impose a heavy burden on the operator of the moving body.

(Means for Solving Problems) The present invention aims at major points that are usually frequently used in cities, tourist destinations such as temples, parks and hospitals,
A plurality of main points such as a residential area, a station terminal, and a main intersection are used as starting points, and each optimum route from each of these starting points to a destination is preliminarily input to a recording medium as route information. Road information of a map image including nodes and links is further input to the recording medium.

An input means (5) for designating a starting point and a destination point is connected to a control unit (6), and the control unit (6) creates a route information group based on the input information of the starting point or the starting point and the destination point. The corresponding route information is designated from the inside to the reproducing means (12). The reproducing means (12) supplies the map information and the predetermined route information for the screen taken out from the recording medium to the image creating device (8), synthesizes the map information and the route information, and displays them on the display section (10). Is.

When there are a plurality of destination points on the recording medium, the route information is stored in advance in the medium by the number of combinations of a plurality of starting points and a plurality of destination points. In this case, when the user inputs the starting point and the destination point using the input means, only one piece of route information and the place name of the destination point are displayed on the screen.

Further, when there is a single destination point, the number of pieces of route information from a plurality of starting points to a common destination point is the same as the number of starting points. The user only needs to enter the starting point and the route information can be displayed on the screen.

In this case, all the route information to a single destination,
Alternatively, the information of the departure point group may be displayed on the screen, and the user may select the nearest route information or the departure point from his or her current position.

The recording medium is a first recording medium (1) for storing map information.
And a second recording medium (3) for storing route information. The second recording medium (3) is composed of a plurality of media classified according to the type and nature of the destination, and the second recording medium (3) is classified according to the type of the destination, such as tourist attractions, public facilities, and gas stations. ) Is configured, and any one recording medium is selected from the second recording media and is detachably connected to the reproducing means.

When the starting point (15), the destination point (18), or both of them are deviated from any of the nodes in the route information group stored in the recording medium, the control unit (6) outputs the input starting point. The route information at the closest position is selected from (15) and the destination point (18) and displayed on the display unit (10) as the corresponding route information.

The user drives at his / her discretion from the starting point (15) to the starting point node (13) of the route information, and thereafter is guided by the route information on the screen. Similarly, when the destination point (18) is distant from the end point node (14) of the route information, the user drives from the end point node to the destination point by his / her own judgment.

For example, from the start point (15) to the start point node (1
If guidance is required for the route up to 3), the route search device of the prior art (Japanese Patent Laid-Open No. 62-82316, Japanese Patent Laid-Open No. 62-82318) is provided in the control unit (6) to start the route information. If the node (13) is input as the destination point, the distance between the starting point and the destination point and the number of intermediate nodes in this case are small, so that the route (19) is promptly calculated and displayed. In this case, the search means indicating the short distance route between the arbitrary nodes and the control unit indicating the long distance route between the main nodes selected in advance are combined to make the best use of each other's merits. It is advantageous.

The route calculation device (11) automatically determines the starting point and the destination point designated by the input means, and simultaneously displays the route (19) by the search device and the route information by the control unit (6), It can also be shown as a series of directions.

(Advantageous Effects) According to the present invention, since the route information group between a plurality of main nodes is stored in the recording medium in advance, the user inputs the starting point and the destination point if necessary, The corresponding route information is immediately displayed, and a significant reduction in time and capacity of the control unit can be achieved.

Particularly, since the second recording medium can form various kinds of media such as a starting point selected according to the purpose of use of the user, for example, a drive course, tourist information, and public facilities, the user selects a desired medium and connects it to the reproducing means. As a result, there is the convenience that the necessary route information can be obtained.

(Examples) The drawings and the following description are for the purpose of facilitating the understanding of the present invention, and should not be used for limiting the scope of the claims.

In the present invention, the information stored in advance in the recording medium is road map information such as roads, buildings, natural terrain, and place name characters, and route information such as optimal route groups between a plurality of main nodes and destination names. .

The map information has a content equivalent to the information on the reduced scale map of 1 / 25,000 issued by the Geographical Survey Institute, and stores the number of sheets covering the whole of Japan. For major cities and regions, map information corresponding to 4/25000 and 16/25000 scale maps is input to the recording medium.

The contents of the map information are composed of information necessary for drawing a road (Fig. 5a) and information necessary for displaying characters such as place names and map symbols (Fig. 5b).

For the road information (Fig. 5a), the map number (20),
The node number (21), the node information (22) of the coordinate data that determines each node at a predetermined position on the screen of the display device (10), and the link information (23) that represents another adjacent node to which each node is connected. Contains.

The information for displaying characters and symbols (Fig. 5B) includes the map number (24), the characters and symbols at predetermined positions on the screen, and coordinate data (2
5), Place name data that displays the place name and topography on the map (16)
Is included.

The map information of FIGS. 5A and 5B and the screen of FIG. 4 drawn based on the map information will be described.

The screen shows a map, with the upper left as the origin, the X coordinate to the right, and the Y coordinate to the bottom (X, Y).
The position of the node point and the place name character (16) on the screen is determined by the coordinates.

In order to express the road on the screen, all intersections, bends, and curves are connected by short straight lines, and several points on the curved road are set as nodes, and the node number is determined. For example, in the map, the third node has coordinates (100, 150) and is connected to the second, fourth, and fifth nodes.

A link (12) is drawn on the screen based on the link information (23).

When the map information is reproduced including the map information of another adjacent map, the content of the link information (23) of the ninth node is the eighth node and the second node of the map. When the user inputs the map number using the input means (5),
The road and place name (16) shown in FIG. 4 are displayed on the screen. The reproduction means (2) is not only a map, but also a map around it.
By also playing back, the map on the screen can be moved by the scroll function of the control unit (6).

The route information is composed of information indicating a route (Fig. 6a), information indicating the name of a destination and a figure (Fig. 6b).

The information indicating the route in FIG. 6a includes one record for one route information about the optimum route between a plurality of main nodes, and record information (26) related to the route information group and each record. It includes map information (27) indicating the existing map number and node information (28) indicating the nodes to be sequentially passed for each route information.

Further, the name of the destination point in FIG.
It includes map number (29), record number (30), character and figure coordinate data (31), and destination name data (17).

As shown in Figs. 1 and 2, the map information and the route information are recorded on different media, and the map information is recorded on a CD-RO.
Input to the first recording medium (1) built into the device, such as an M disk or a magnetic tape. The route information is classified according to the type and nature of the destination, and is input to the portable second recording medium (3) such as a plurality of magnetic cards and magnetic sheets according to the classification.

Since the second recording medium (3) is composed of a plurality of media, one medium is taken out according to the purpose of use, and this medium is connected to the second reproducing means (4) and stored therein. The information is once transferred to the data memory (7). When the second recording medium (3) is a golf course route guide card issued by a specific golf course, and the destination point is single, it is not necessary to input the destination point, and the guide card is set and stored. All the route information that is being processed can be displayed on the screen of the display device.

When there are a plurality of destination points, the input means (5) is operated to input the starting point and the destination point, and the control section (6) instructs the first reproducing means (2) to reproduce the corresponding map. The map information is transferred to the data memory (7) and displayed on the screen.

In the embodiment shown in FIG. 1, the input start point and destination point are
This is the case where the start point and the end point of any of the optimum routes in the route information are matched or on the optimum route.

The image creating device (8) takes out the optimum route corresponding to the starting point and the destination point from the data memory (7) and displays it on the display device (10) via the image memory (9).
The display method is preferably thick lines, colored lines, blinking lines, etc., which are easy to see and can be distinguished from the map information.

The embodiment of FIG. 2a is a case where one or both of the starting point and the destination point can be input even when they are out of the optimum route of the route information. The input means (5) is a route calculation device (1
When the node of the starting point (15) in FIG. 4 is input, the route calculation device (11) selects the starting point node (13) of the nearest route information and selects the control unit (6). ) To display on the screen.

The route calculation device (11) is equipped with the search function of Japanese Patent Laid-Open No. 62-82316 to calculate the optimum route (19) from the starting point (15) to the nearest starting point node (13) for network flow calculation. By combining the route by the route information and the route by the route calculation device and displaying it on the screen, the node at an arbitrary point on the screen is used as the starting point, and the start and end nodes of the route information are determined. Since calculation is not required between nodes, it can be displayed in a short time and with a limited calculation capacity.

In the embodiment shown in FIG. 3, the route information is required by inputting the route information into the same medium as the recording medium such as a CD-ROM storing the map information as shown in FIG. 3 and operating the input means (5). Various types of route information are reproduced, and map information and route information are combined and displayed on the screen of the display device.

The configuration of each part of the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

1 to 3 are block diagrams for explaining each embodiment of the present invention, FIG. 4 is a display content of a screen by the device of the present invention, and FIGS. 5A and 5B are map information stored in the first recording medium. , And FIGS. 6A and 6B are the contents of the route information stored in the second recording medium. (1) (3) ... Recording medium (2) (4) ... First and second reproducing means (5) ... Input means (6) ... Control unit (8) ... Image creating device (10) ... Display device

Claims (3)

(57) [Claims] 1. Road map information including nodes and links, and
A recording medium in which a route information group indicating a preset optimum route between a plurality of nodes is recorded, a reproducing means for extracting map information and route information from the recording medium, and a starting point or a starting point and a destination point in the route are input. Input means, a control unit for instructing the reproducing means based on the input information of the starting point or the starting point and the destination point to retrieve the corresponding route information from the recording medium, and the retrieved road map information and route. A route information display device having a display unit for combining and displaying information. 2. A first recording medium in which road map information including nodes and links is recorded, and a preset optimum route group between a plurality of nodes is recorded in a plurality of mediums, and the type or nature of a route or a destination point is recorded. A second recording medium in which an arbitrary medium can be selected, first and second reproducing means for extracting road map information and route information from the first and second recording medium, respectively, and a starting point or a starting point and a destination point in the route are described. Second based on the input means to input and the information of the input starting point or starting point and destination
A route information display device comprising: a control unit for instructing the reproducing means to retrieve the relevant route information from the second recording medium; and a display unit for combining and displaying the retrieved road map information and route information. 3. A route calculating device, which is connected to an input means, calculates a node and a link from a starting point to a destination point, and represents an optimum route on a display device, from the starting point to the starting point node of the route information. 3. The apparatus according to claim 1 or 2, wherein the optimum route of the above, and the optimum route from the end point node of the route information to the destination point are continuously displayed in the route information.