JPH0497384A - Guiding device for path on map - Google Patents

Abstract

PURPOSE:To accomplish the guidance of a path in which the relation of paths is clearly shown even in the case of a wide range on a display device having a limited display area and to obtain an easy-to-use and convenient displaying and guiding device for the path on a map by constituting the device of a storage device, a storage controller, a display data generating device, a display controller and a display device. CONSTITUTION:This device is provided with the storage device 1 in which map information is stored, the storage controller 2 which fetches data from the storage device, the display data generating device 3 having a path retrieval device. Then, the display controller 5 which receives the display data from the device 3 and controls the display thereof, and the display device 6 on which the map or the related information is displayed according to a command from the controller 5 are provided. Thus, the easy-to-use and convenient guiding device for the path on the map where the entirety of the path among plural spots in a wide range is simultaneously displayed to be understood is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a map route guidance device, and more specifically to a navigation device for an automobile.

Generally speaking, road guidance systems such as car navigator systems display the entire route from the current location to the destination, and it is desirable to be able to check the entire route at once.6 However, Conventionally, the screen size (range) of a display device that displays map information has been limited, as seen in the presentation of map route information in automobile navigator systems.
In comparison, the range to be displayed in a map display is too large, so it is not necessarily possible to display all the necessary range at once with an appropriate readable resolution. Therefore, - numerically, by switching and displaying the road map,
A method was used to investigate routes between multiple points (destination, stopover, departure point, current location, etc.).

As a solution to this problem, that is, in order to display multiple points at the same time, the following methods have conventionally been used: (1) A method in which the map is reduced and displayed at the same reduction rate.

(2) A method in which all possible requests are assumed in advance, and a wide range of map data with different details for each part is prepared and selected as needed.

However, the above method (1) has the problem that it is not always possible to display the details of the request and that it is difficult to read.

In addition, method (2) requires a large amount of enlarged road map data covering a fairly wide range, and it is difficult to prepare map data for a wide range.

As mentioned above, in road guidance such as a car navigator system, the entire route from the current location to the destination is displayed, and it is desirable to be able to check it every time, but the display range of the display device is limited. Therefore, it was difficult to display a certain amount of detail, reduce the amount of data that needed to be prepared, and display it at a readable resolution.

■--Power The present invention was made in view of the above-mentioned circumstances.
especially.

1. To have a means for simultaneously displaying and understanding the entire route between multiple points in a wide range.

2. Only a limited number of data can be prepared in advance (-It costs a lot of money to prepare map data numerically).

3. The surroundings of multiple points requested to be displayed can be displayed in detail. Can not).

4. To provide an easy-to-use and convenient road map display guide function that satisfies the above 1 and 2.3.

This was done for the purpose of

In order to achieve the above object, the present invention provides (1) display data creation having a storage device storing map information, a storage control device for retrieving data from the storage device, and a route search device; A map route guidance device comprising: a display control device that receives and displays display data from the display data creation device; and a display device that displays a map or its related information in accordance with instructions from the display control device. (2) The map route guidance device of (1) above has a function of specifying the position coordinates of the end points of the route (starting point, stopover point, destination) on the map data. ,
(3) A map route guidance device that satisfies the condition (2) above has a function of extracting the coordinates of the best road route, (4) A map for guiding the best route that satisfies the condition (3) above. A route guidance device that has a function of displaying multiple points separated from each other by the number of points desired to display correct map data on a display screen, and a route connection relationship between the multiple pieces of map data that are separated from each other. It is characterized by having a function to extract the roads and display the roads in a complementary manner between them.

The following will explain one embodiment of the present invention.

FIG. 1 is an overall configuration diagram for explaining one embodiment of a map route guidance device according to the present invention. In FIG. Storage control device to retrieve.

3 is a display data creation device, 4 is a route searcher (extracts the best route between a starting point and a destination point based on map data), and 5 is a display control that receives display data and controls the display. The device 6 is a display device (a map or its related information is displayed according to display coordinate commands 1 to 1).

The road route guidance device of the present invention described above is realized in the following manner.

1. Find the coordinates of the destination point and departure point on the road map data.

This is possible according to the prior art, and the destination and current location are specified, for example, by a method in which a road map is displayed according to the user's specification of an area name, and the user selects the coordinates by pointing at the exact location.

2. Search for the best route on the road map data using road map data and a route search device.

The optimal route search method is possible according to the prior art, and as a result, the coordinates of the road of the best route as shown by the dotted lines and arrows in FIG. 2 are determined. The best route extracted at this time may not be fully displayed on the readable map data.

3. Determine the range of map data to be displayed based on the best route.

In Uni, the display device has sections on the display screen that display correct map data for the number of points desired to be displayed (each section is called a segment).

Assume that they are separated from each other and their surroundings are blank. If the number of points you want to display in Figure 3 is 2,
The display screen layout is shown below. This example has two map data areas A and B, which are separated from each other. The other area is a temporary route display area C.

4. Extract the road coordinates of the best route on the display screen.

Calculates the coordinate position on the actual display screen from the map data. At this time, the coordinate values of the best route can also be extracted. As a result, the coordinate values of the best route at the boundary point between the map data display area and the tentative route display area on the display screen can be extracted.

As a result, as shown in FIG. 4, the coordinate values of the tentative departure point and board destination point can be extracted.

5. Search for routes between displayed maps.

In the blank area (temporary route display area C) between the map data sections as shown in 3 above, data for virtually displaying a road is prepared as shown by the thick line in FIG. At this time, based on the tentative departure point and board destination point on the tentative route extracted in step 4 above, the best route from the tentative departure point to the board destination point on the tentative route is extracted. This can be extracted by the route searcher 4 in FIG. As a result, as shown in FIG. (Figure) to synthesize the display data.

It is displayed on one display device 6 as shown in FIG.

As is clear from the above description, according to the present invention, route guidance that clearly shows route relationships even over a wide range is possible on a display device with a limited display area, and is easy to use. A convenient map route display and guidance device can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining an embodiment of a road route guidance device according to the present invention, and FIGS. 2 to 7 are diagrams for explaining the operation of the present invention. 1.Map data storage device, 2.Storage control device, 3.
Display data creation device, 4...route search device, 5...display control device, 6...display device. Figure 1

Claims (1)

[Claims] 1. A storage device that stores map information, a storage control device that retrieves data from the storage device, a display data creation device that has a route search device, and receives and displays display data from the display data creation device. a display control device;
A map route guidance device comprising a display device that displays a map or its related information in response to instructions from the display control device.