JPS59176894A - Position setting method for map display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a position setting method for displaying a map by which a desired position can be accurately set on a road map displayed by a map display device.

(b) Prior Art Recently, a map display device has been developed that displays a road map of the area in which the military is driving on a cathode ray tube, and displays the departure point, destination, current location, travel trajectory, etc. on the map for convenience in driving. is being developed. In such a map display device, the driving area is divided into areas of appropriate size and the road map for each area is stored on a cassette tape, etc., and the road map of the area where you want to drive is displayed by selecting the necessary cassette tape. is displayed on the screen, and the traveling trajectory of the vehicle is displayed on the map-L based on the information on the traveling direction and the traveling distance of the vehicle. □By the way, display the road map of the desired area on the display screen of the map display device (this is done by selecting a cassette tape that includes the desired area from among several cassette tapes prepared in advance, and then selecting a cassette tape containing the desired area. You can choose from symbols or codes, but it is difficult to immediately tell which area the cassette tape contains a road map from just by looking at the symbols or codes, and even if you do, you cannot tell which area the cassette tape covers. .

On the other hand, to set the starting point of your troops on the road map displayed on the screen, use the cursor keys provided on the control panel of the device to move the catheter vertically and horizontally on the screen and stop at the desired starting point. Operate the setting keys to enter the coordinates of the departure point.

The displayed road map is usually at a scale of 1:250,000 or an enlarged version of 1:50,000, and the map includes information such as major arterial roads such as national highways and prefectural roads, and the names of major cities, towns, villages, and places. However, when manually specifying the starting point on Map 1-'' (which is very little information compared to the information in atlases, etc.), you can manually specify the starting point on Map I-, such as at an intersection or on a bridge on the road where the starting point is displayed. There is no problem if the location is clear, but if it is on a city road, private road, or in front of a garage that is not displayed on the map, it is difficult to set the departure point while moving the cursor on the display screen.Setting the departure point If this is not accurate, there is a problem in that when the travel trajectory is subsequently displayed, the trajectory will rub off from the road, making it impossible to display an accurate travel trajectory.

(→Object and Structure of the Invention The present invention has been made in view of the above points, and is intended to enable accurate setting of any position on a road map displayed on a map display device. The purpose of this project is to provide an atlas that includes each area in which the road map to be displayed on a map display device should be displayed on one screen;
Using a positioning scale in which thin lines are drawn at predetermined intervals on a transparent part of the atlas having an area equal to the area of the guide route map, apply the scale to a desired area of the atlas and locate the area within that area at the intersection of the side lines. The coordinates of a desired position are read and input into the map display device G'.

) Example The present invention will be described below with reference to the drawings.

The cassette tape used for storing road map information in a map display device divides the area included in a dedicated map book into several appropriate areas, as shown in Figure 1, and records each area separately. Map information of the area is stored in each cassette. For example, looking at the Kanto region, the Kanto region is divided into 500 areas, 20 vertically and 25 horizontally, and the vertical division is divided into 1 to 20 areas from top (north) to bottom (south).
, horizontal division from left (west) to right (east) & 1
25, and the map number of each area (for example, 14-18) is printed in the atlas 1. The cassette tape stores road map information for the above-mentioned 500 areas along with map numbers.

FIG. 2 shows an example of the display screen and operation section of the map display device, and a road map of a certain area is displayed on the display screen.

In order to display a road map of a desired area on the display screen 3 in this manner, first a cassette tape storing road map information of an area including the area is selected and inserted into the device at a predetermined position. At this point, operate the search button 41 of the operation section 4 to put the device in search mode G, open the special map book, check the area number of the desired area, and input the map number using the setting key 44. The setting key 44 may consist of, for example, a start key and numeric keys 0 to 9, or a cursor switch may be used. When the input is completed, map information starts to be read from the cassette, and the area name (for example, Kanto region) and map number (for example, 14-18) are displayed on the Nobobo screen.
After that, a road map of the area corresponding to that map number is displayed.

When the cursor key 43 is operated after the road map is completely displayed, a cross cursor 5 as shown in Figure 3'' appears on the display screen. The intersection point P of the cross cursor 5 can be moved to any position Q on the display screen by operating the cursor key 43.
This can be moved. So, this cursor key 4
3 to move the intersection point P of the cross cursor 5 to the current position of your army, and when they match, press the setting key 44 again to complete the setting. The coordinates of the current position thus set may be displayed on the display screen 3.

By the way, with the above method, it may be difficult to set the current position on the display screen 3-1:. For example, when setting the current location of a relatively narrow road or a home garage, it is difficult to set the current location because these are not displayed on the display screen 3Q. In such a case, a scale as shown in FIG. 3 is used.

The scale 6 is made of a frame 6a made of cardboard or plastic covered with a transparent plate 6b having dimensions that match the display screen 3, or made of one piece. It is preferable to determine the number of thin lines depending on the signal processing method of the road map information displayed on the display screen. For example, when displaying map information through digital processing, The image is divided into 96 parts and 128 parts in the horizontal direction.

If the dimensions of the display screen 3 are 96 fins vertically x 128 fins horizontally, the thin lines are spaced at 1 mm intervals, and if a 1/250,000 scale road map is used, one division (lim) corresponds to 250 - (scale 6). The vertical and horizontal axes of are marked with scales with the left F corner as the origin.

Place the scale 6 like this on the desired area in the dedicated atlas (contains information from the regular atlas), read the coordinates of the position you want to start from from the scales on the vertical and horizontal axes, and press the setting key 44. All you have to do is do it manually.

The enlargement/reduction key 42 provided on the operation unit 4 is a key for enlarging the scale of the road map displayed on the screen or returning it to the normal scale. For example, the road map is normally displayed at 1/250,000. A road map can be enlarged to 1:50,000.

When the vehicle starts traveling, the traveling trajectory S starts to be displayed from the starting position on the display screen 3 as shown in Fig. 4, and the traveling distance of 15 km is always displayed. It is expressed as

The number of thin lines drawn on the transparent plate of the scale, that is, the interval, is determined by the dimensions of the display screen, the fineness of the display, the accuracy of the trajectory display, etc., and the above-mentioned example is only a preferred example.

(G) As described in detail, the present invention (in this case, a map display device (2) is used to display a road map on one screen (2) in order to set a desired position on the displayed road map. For each area to be displayed (including the atlas) and a positioning scale with thin lines drawn at predetermined intervals on a transparent part of the atlas with an area equal to the area of the road map, apply the scale to the desired area of the atlas. Since the desired position within the area is read at the intersection of the thin lines and manually inputted to the map display device, setting the desired position is accurate and easy.As a result, the starting point of the vehicle can be set accurately. In the map display device that displays the driving trajectory, the driving trajectory rarely deviates from the road;
Accurate travel trajectory can be displayed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a dedicated map book used in the present invention, FIG. 2 is a front view of a map display device, and FIG. 3 is a front view of an example of a positioning scale used in the present invention. l...Atlas 3...Display screen 4...Operation unit 5...Cross cursor 6...Scale 6b
... Transparent plate patent applicant: Nissan Motor Co., Ltd. Patent attorney: Zhang Suzuki Figure 1

Claims (1)

[Claims] For each area where the road map is displayed on one screen of the map display device (
Using an atlas that is divided and included, and a positioning scale that has a transparent part with an area equal to one area of the road map included in the atlas, and thin lines are drawn at predetermined intervals on the transparent part, A method for setting a position in a map display, comprising applying the scale to a desired area, and reading the coordinates of a desired position within the area at the intersection of the thin lines and inputting the coordinates to the map display device.