JPS59126207A - Map information displaying device - Google Patents

Abstract

PURPOSE:To enable the determining of the distance in the set course by computing the distance based on the course set on a map displayed. CONSTITUTION:This display is equipped with an arithmetic unit 1 such as microcomputer, an external memory 8 for memorizing map information or an information medium, an image memory 3 for memorizing a cursor, the moving course thereof, and a graphic to be displayed such as character, a display unit 4 for displaying the contents of the memory 3 and an operator for operating the setting of starting points and destinations, the movement of the cursor and the like. Then, the cursor is displayed laid on a map graphic indicated while the moving distance of the cursor on the map shifted from the starting point to the destination under the control of the operator 2 is converted into an actual distance with the unit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a map information display device for displaying a map on a display device such as a CRT display.

2. Description of Related Art Structures and Their Problems In recent years, devices have been proposed that have an arithmetic unit such as a microcomputer and a video memory and display a map on a display surface such as a CRT display. These devices are installed on moving objects such as automobiles, and are used in combination with a distance detector to detect when a vehicle has traveled a certain distance, and an azimuth detector to detect changes in angle or geomagnetism associated with the movement of the vehicle. It is used as.

FIG. 1 is a block diagram of a map information display device used as a conventional travel trajectory display device, in which (1) is an arithmetic unit, (2) is an operation unit such as keys, (3) is a video memory, (
4) is a display device, (5) is a distance detector, (6) is a direction detector, and (7) is a sheet-shaped information medium showing map information, which is arranged on the display surface of the display device (4). This information can be visually superimposed on the information displayed on the display screen. This conventional map information display device first sets a starting point on a display device (4) corresponding to a sheet-like information medium (7) using an operating device (2) and adjusts its display scale when the vehicle is traveling. Make settings. After that, when the car starts running, the calculation device (1) calculates the distance traveled based on the signal sent from the distance detector (5).
The direction in which the vehicle is traveling is determined from moment to moment based on the output of the direction detector (6), and the constantly changing current position is obtained as a two-dimensional marker by making correspondence with a preset scale factor. In addition, the information displayed on the display device (4) and the image memory (3) have a one-symmetrical correspondence, and the ever-changing current position expressed in two-dimensional coordinates and the image memory (3) While responding, you can save the travel trajectory to the location (・1).
It can be displayed in a superimposed manner with the medium (7).

2nd 1 is a block diagram of a conventional map information display device that uses a sheet-like information medium (7) and is configured in a 7-track format. (1) to (6) are the same as in Figure 1, and (8)
is an external storage device that contains road information and 1lj1 map updates of scale temples. In the case of Fig. 2, first select the map to be displayed using the operating device (2) and
). The arithmetic device (1) is an external storage device (8)
The selected map information is read out, and the data used for arithmetic processing such as the scale factor is written into the video memory (3), and the pattern to be displayed, such as the internal display of the display system, is written into the video memory (3). In this case, if there is only one video memo (January 3), only one color (or two gradations) can be displayed on the display screen, so many devices have multiple video memories.

-J-1□ -py=h〒No. 31'd is a diagram showing the correspondence between the video memo (January 3) and the display screen. Figure 3 (a) is a video memo January 3)
(b) shows the display surface of the display device R (4) when the video memory (3) stores data as shown in (a).

In addition, Fig. 3 (al (b)) shows an enlarged view of the area surrounded by the dotted line in the above figure below. In the road (10
a) and the cursor (ll) used to set the starting point, etc.
In order to change the color (or gradation) from a), I have two video memos, and write the road in the first video memory and the cursor in the second video memory.

(If you further increase the number of video memories, more colors,
Or it can be displayed in gradation. ) Also, the lower figure of Figure 3(a) (
In the enlarged view), each small square corresponds to one bit of the video memory, and by writing that one bit 111 or 101, the content to be displayed on the display device r(4) is determined.

Therefore, when the video memory (3) has contents as shown in FIG. 3(a), a figure as shown in FIG. 3(b) is displayed on the display screen. Here, the road (101)) and the cursor (1
rb) are displayed in nine different colors (or gradations).

In Fig. 2, after the map and cursor are displayed on the display device (4) as described in Section 1, first move the cursor using the operating device (2) as explained in Fig. 1. Gong,
By setting the current position time and calculating the output of the distance detector (5) and direction detector (6) by the arithmetic unit (1), the two-dimensional coordinates of the current position, which changes from moment to moment, are determined. However, in this case, the scale factor that has already been read from the external storage device (8) and stored in the internal storage device will be used.Then, the ever-changing current position will be recorded in the video memo (January 3). The object of the present invention is to provide a map information display device that is capable of displaying a map and a travel trajectory on display device #(4) by storing information (distance on a Shina ξr road). .

Structure of the Invention The map information display device of the present invention comprises a computing device such as a microcomputer, a storage device or information medium that records location IE+ information, and a cursor, a moving route of the cursor, and figures to be displayed such as characters. A video memory for storing data, a display device for displaying the contents of the video memory, and an operation device for setting the starting point/destination and moving the cursor are provided. In addition, the calculation device is configured to convert the distance traveled by the cursor on the map from the starting point to the destination under the control of the operating device into an actual distance, and It is characterized by being able to determine the actual distance to a destination.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 7. FIG. 4 shows a block diagram of the map information display device according to the present invention, in which (1) is a microprocessor, an internal h
(2) is an operating device consisting of a memory device, etc.;
(3) is a video memory that stores the immediate format to be displayed; in the case of a color image, for example, it consists of three memories that store i-images corresponding to R, G, and B, and these three images are superimposed. A multicolored image is displayed. +41 is a display device that displays the contents of the video memory. First, operation @
Select the map to be displayed by setting f21 and calculate a quotient (
Let 11 know. Arithmetic unit R (1) is an external storage device (8)
The data used for reading out the selected map information and calculating the scale factor, etc. is stored in the internal storage device (not shown) of the calculation device <n, and the pattern to be displayed on the road map and the data used for calculation processing such as the scale factor are stored in the internal storage device (not shown). Write type 1 to the video memory (3).

In this embodiment, in consideration of visibility, there are at least two video memories (3), one of which is used to display a cursor, etc., and the other video memory is used to display a map. There is. After displaying the map and cursor in this way, in order to find the distance between two points (called the starting point and destination), first set the starting point by operating the operating device and moving the cursor to the starting point. I do. For example, Fig. 5(a)
Set the starting point as follows. In FIG. 5, the cursor is indicated by a country mark (1211) and a broken line (133).The cursor is then moved along the route of the desired distance (hereinafter referred to as route setting), and the moving route is displayed. Figure 5(b) shows the display screen (or the contents of the video memory) when setting a route, and the solid line 04) represents the # moving route of the cursor.When the cursor is moved to the destination, the operation device The destination is set according to (2). Fig. 5 (C) shows the display contents when the destination is set. Here, σ represents the starting point and 7 represents the destination.

FIG. 6 shows the travel route set in this way, where one small square corresponds to one bit of the video memory (3). Then, the starting point is P, and the destination is P4. One point along the route is Pn, and Ps=Po.

When P, = pH, the distance from P- to Pd can be calculated as follows. First, external? Storage device (8)
According to the read scale factor, the actual distance 1liit corresponding to each 1 bit of the video memo 3) is determined. (1
The actual distance corresponding to the dot may be stored in an external storage device as a scale factor. ) Distance per dot in the X direction (e.g., east-west direction on a map) k The distance is In, the distance in the Y direction is yo
Then, the distance l from the starting point P8 to the destination P6 is l=Σb! -* -■n=square, xn (n=1J, . . . N)=o, or X7n (n=lJ, ・N)=O, or y. Also, when the scale factors in the X and Y directions are equal, that is, when z = y = clQ, the dot difference in the X direction between Pn- and Pn is x,', and the dot difference in the Y direction is 7n.
Then, the distance l can be found as tatashi, xn' (n=1.2...N)=0, or 17n'("" 1 + 2+ "") = O1 or 1. As described above, according to the present invention, the value of l obtained by the first or second equation is displayed on the display device (4
) The distance information from the starting point to the destination can be presented.

Next, other embodiments of the present invention will be described.

In other embodiments, starting point setting 1 is similar to the above embodiment, but instead of setting the route, a finite number of way points are set. The distance between the points is approximated by a straight line distance, and the sum is calculated. To set a waypoint, move the cursor to the point that should be the waypoint in the same way as setting the starting point, and press the operating device (2
) are set sequentially by operating the switches above. In this case, since the order of the way points cannot be determined based on the contents of the video memory (3) alone, the order is determined by the computing device f(1) when setting the way points.
are sequentially stored in the internal storage device. Then, when you set the waypoints to the destination, set the starting point P8 as P8, set the waypoint as P, ~
a-1, the destination PeL is P, and the video memory (3
), the dot difference in the X direction from Pn-1 to Pn is D
xn, the dot difference in the Y direction is Dyn, and the X direction 1''=il
(2) □ Distance per dot is x, distance in Y direction is y
Then, from the starting point P8 to the destination Pa'! The linear approximation distance l' in is obtained by the third equation below.

Also, when the scale ratios in the X direction and Y direction are equal, that is, x
When = y = d, l' is determined by the fourth equation.

l / -a-shoe 2+ (D Ayu)'...
・ ■Figure 7 is Dy! and Dxs is O in this embodiment.5 In the above two embodiments, the map is also stored in the video memory (3),
Although the map is written in the map and displayed directly on the display device (4), the map shown in FIG. 1 may be displayed in a sheet form and displayed overlappingly on the display surface.

As described in the detailed description of the invention, according to the map information display device of the present invention, the distance is calculated based on the route set on the displayed map, so the distance of the set route can be determined.
For example, when driving a car or providing tourist information, information on the distance to the destination is provided to drivers, tourists, etc.
Appropriate guidance can be provided. Furthermore, in the configuration shown in Figure 2, if data indicating the location where the adjacent map is stored is included in the jiyanagi information of the external storage device,
When the cursor attempts to move out of the range of the currently displayed map, the map adjacent to that map can be automatically switched and displayed (without using the operating device), allowing for a wider range of distances. This makes it possible to obtain the following.

[Brief explanation of the drawing]

Figures 1 and 2 are block diagrams of a conventional map information display device used as a driving trajectory display device, Figure 3 is an explanatory diagram of the correspondence between a conventional video memory and a display screen, and Figure 4 is a diagram of the present invention. FIG. 5 is a block diagram of an embodiment of the map information display device, FIGS. 5 and 6 are explanatory diagrams of FIG. 4, and FIG. 7 is an explanatory diagram of an embodiment of a song. (1)... Arithmetic device, (2)... Operating device, (3)
...Video memory, (4)...Display device, (5)...
・Distance detector, (6)... Direction detector, (8)...
External memory temporary agent Yoshihiro Morimoto Figure 1! Figure 2 Figure 3 (a) (Tofu Figure 6 Figure 7 39

Claims (1)

[Claims] 1. A computing device such as a microcomputer, an external storage device or information medium that records map information, a video memory that stores a cursor, a cursor movement route, and figures to be displayed such as characters, and a video memory. A display device for displaying content and an operating device for setting a starting point and destination, moving a cursor, etc. are provided, and the cursor is displayed in an overlapping manner with the displayed map figure, and the above operating device is controlled. A map information display device configured such that the arithmetic unit converts the moving distance of the cursor on a map from a starting point to a destination into an actual distance.