JPH07175410A - Map scale display method and map scale display device - Google Patents

Abstract

PURPOSE:To enable a user to easily know about what range, in terms of a distance, the map displayed on a display after a scale change covers by calculating the actual scale corresponding to the width of the map displayed on a display and displaying this scale on the display. CONSTITUTION:This map scale display device is composed of the display 1 which displays the map and the actual scale corresponding to the width of the displayed map, a map data base 3 which holds map data, a map scale display instructing means 5 which instructs the display of the actual scale corresponding to the width of the displayed map and a controller 7 which controls the operation of respective constituting elements and calculates the actual scale corresponding to the width of the displayed map. The map data of the map data base 3 may be stepwise reduction scales or single reduction scale. The map data is read out of the controller 7 and the map data base 3 and is displayed on the display 1. Further, the actual distance of the width of the map during display is calculated by a map scale display means 5 and is displayed on the display 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map scale display method for displaying a map on a display and a map scale display device for implementing the method.

[0002]

2. Description of the Related Art When a map is displayed on a display, the displayed scale can be displayed as "1 / 10,000", but the map displayed by zooming, etc. When the scale of is changed, the scale of the map actually displayed is not displayed. Then, in general, the scale of the map displayed on the display is represented by a scale having an appropriate length and a distance on the map corresponding to the scale length. Therefore, when changing the scale of the map displayed on the display, it is often the case that the scale of the map displayed after the scale change is informed by the distance indicated by the scale.

In such a case, if the distance indicated by the scale is set to a numerical value with good division, the length of the scale indicating the scale differs depending on each scale map. On the contrary, if the length of the scale is made constant, the value indicated by the scale will have a fraction.

Therefore, the extent to which the map displayed on the display covers the distance cannot be sufficiently conveyed. Also, when changing the scale of the map, in the method of notifying the scale of the map displayed after this scale change by the distance indicated by the scale, what scale of the map is displayed, that is, how much range is displayed. I don't know enough to see the map to cover.

[0005]

As described above, in the conventional map scale display method, it is sufficient to determine the distance range of the map displayed on the display or the map to be displayed on the display. There was a problem that it was not transmitted.

According to the present invention, when the map displayed on the display or the scale of the displayed map is changed, the extent to which the map displayed on the display covers the distance is changed. An object of the present invention is to provide a map scale display method that is easily understood and a map scale display device that implements the method.

[0007]

[Means for Solving the Problems]

(First Map Scale Display Method) An actual scale corresponding to the width of the map displayed on the display is calculated and displayed on the display.

(First map scale display device) A display for displaying a map, a map database for holding map data, and map data read from the map database, and this is displayed on the display, and the display also displays the map data. And a control means for calculating a scale corresponding to the width of the displayed map and displaying it on the display.

(Second Map Scale Display Method) When the scale of the map to be displayed is changed and set, a scale corresponding to the width of the map displayed on the display after the map scale is changed is calculated and displayed on the display. .

(Second map scale display device) A display for displaying a map, a map database for holding map data, and map scale changing means for changing and selecting a map scale,
The map data of the map scale selected by the map scale changing means is read from the map database, the map scale of the map data is calculated and displayed on the display.

[0011]

[Action]

(First Map Scale Display Method) and (First Map Scale Display Device) Since the actual scale (distance) corresponding to the width of the map displayed on the display is displayed, it is displayed on the display. It is possible to easily know how far the map that is covered covers distance.

(Second Map Scale Display Method) and (Second Map Scale Display Device) When changing the scale of the map displayed on the display, the map is displayed on the display after the scale is changed. Since the actual scale (distance) corresponding to the width of the map is displayed on the display, it is possible to imagine in advance how much map will be displayed, and the map of the intended scale can be displayed. Can be displayed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first map scale display method of the present invention and a first map scale display device for implementing the same will be described with reference to the circuit configuration of FIG. A display 1 displaying a map and an actual scale corresponding to the width of the displayed map, and a map database 3 holding map data.
And an actual scale corresponding to the width of the displayed map while controlling the operation of the map scale display instructing means 5 for instructing the display of the actual scale corresponding to the width of the displayed map and the components described above. And a control device 7 for calculating a scale.

Next, each component will be further described. The map database 3 holds map data, but this map data may have a graduated scale or a single scale.

The display 1 displays a map and further displays an actual scale (for example, distance) corresponding to the width of the displayed map. The display for displaying the map and the display for displaying the actual distance corresponding to the width of the map may be separate.

The map scale display instructing means 5 is means for instructing to display or cancel the display of the actual distance corresponding to the width of the displayed map. To cancel the map width distance, a certain time has elapsed after the map width is displayed,
It may be executed when there is no input from the map scale display instruction means 5 during that time. The actual distance corresponding to the width of the map may be set to always be displayed, and the display may be turned off by operating the display canceling function, or the display canceling function may not be provided.

The control device 7 reads the map data from the map database 3 and displays it on the display 1. Further, by the instruction from the map scale display instruction means 5,
The actual distance of the width of the displayed map is calculated, and the distance is displayed on the display 1.

FIG. 2 shows an example in which the map database 3 holds map data (a), (b) and (c) in three scales. As shown in FIG. 2D, the control device 7 reads the map data from the map database 3 and displays it on the display 1. In this case, the map data actually corresponds to the width of the map displayed on the display 1. Figure 2 shows the distance
It becomes 500 m like the one shown in (a).

FIG. 3 shows a process in which the actual distance corresponding to the width of the map displayed on the display 1 is displayed and then the display is canceled. At this time, a scale indicating an appropriate distance on the map may be displayed.

Next, a second map scale display method of the present invention and a second map scale display device for implementing the same will be described with reference to the circuit configuration of FIG. When changing the map and map scale, the actual scale (distance) corresponding to the map width after the scale change
Is displayed in advance, a map database 13 that holds map data, a map scale instruction means 15 used when changing the display to, for example, a wide area map or a narrow area map, and the operation of each of the above-mentioned components. And a control device 17 that calculates the actual distance corresponding to the width of the map that is to be displayed with a reduced scale.

Next, each component will be further described. The map database 13 holds map data, but this map data may have a stepwise reduction scale or may have a single reduction scale.

The display 11 displays a map and an actual distance corresponding to the width of the map after the scale change when the map scale is changed. The display for displaying the map and the display for displaying the actual distance corresponding to the width of the map may be separate.

The map scale instructing means 15 is for, for example, a wide area button for instructing a wide area map, a narrow area button for instructing a narrow area map, and for instructing display of a map corresponding to a fixed scale. Consists of a confirm button. Alternatively, the confirm button may be excluded from the constituent elements, and may be configured to confirm the scale and instruct to start the map display when there is no button operation for a certain period of time after the operation of the wide area button or the narrow area button. Alternatively, instead of the wide area and narrow area buttons, the scale is selected.

The control device 17 reads the map data from the map database 13 and displays it on the display 11. Further, when the actual distance of the width of the map of the scale designated by the map scale designating means 15 is calculated and the distance is displayed on the display 11, or when the scale of the displayed map is fixed by the map scale designating means 15. The corresponding map is displayed on the display 11.

FIG. 5 shows an example of an operation sequence and a screen displayed on the display 11 when changing the scale of a map according to the present invention. In FIG. 5A, the current map is displayed on the display 11. Then, when the map scale instructing means 15 is operated to change the scale of the map displayed on the display 11, the actual distance corresponding to the width of the map to be displayed on the display 11 after the change becomes
It is displayed as shown in FIG. The display example of FIG. 5B assumes a case where a map database 13 that holds maps of three stages with different scales is handled, as in FIG. 2, and each stage of scale is represented by a small rectangle. It is shown, and each stage corresponds to each of the three squares.
FIG. 5B shows that when the center is selected, the actual width of the map after the selection is changed is 8 km (the large rectangle surrounding the small rectangle is the width at the time of selecting the scale at this stage). It means that the distance is the distance just shown.). In addition, the square indicating the scale of the map currently being displayed has a different color from the others (as shown in the figure, for example, the currently displayed one is gray and the other unselected ones are black. The horizontal distance of the map currently being displayed is 500 m. When the map scale designating means 15 is operated with reference to such a distance display and a confirmation is instructed when the desired map width is displayed, a map of the desired scale is displayed as shown in FIG. 5 (c). 11 is displayed.

Further, the display 1 is shown in FIG. 6 after the scale is changed.
An example is shown in which the actual distance corresponding to the width of the map to be displayed in 1 is displayed when the scale of the map is changed. Figure 6
FIG. 5A shows a case where FIG. 5B is further developed. Figure 6
(B) shows the actual distance of the vertical width as well as the horizontal width. Then, the black square corresponding to the desired scale change destination is surrounded by a square to facilitate the determination. In addition, the square indicating the scale of the map currently being displayed has a different color from the others.

FIG. 7 shows another example of the operation sequence and the screen displayed on the display 11 when changing the scale of the map according to the present invention. In this example, the selection of the scale change destination is
Perform on a scale with 1 to 5 scales. And
As the number increases, so does the actual scale (distance) corresponding to the width of the map. In FIG. 7A, a map of the local point is displayed on the display 11. And FIG.
As shown in (b), by operating the map scale instruction means 15,
When the scale 3 displayed on the display 11 is selected, the control device 17 calculates the actual distance corresponding to the width of the third map and, as a result, displays on the display 11 that the width is 8 km. . It should be noted that by enclosing the numbers in a square, it is shown in which positional relationship the map currently displayed on the display 11 is. When the map scale instructing means 15 is operated with reference to the display of such a distance and a confirmation is instructed when the desired map width is displayed, a map of the desired scale is displayed as shown in FIG. 7C. 11 is displayed. The map scale instruction means 15
Also selects between the scale numbers, the controller 1
It is also possible for 7 to calculate the actual distance corresponding to the width of the corresponding map and display the result on the display 11.

Further, as shown in FIG. 8, the map scale instructing means 15 and the control device 17 in FIG. 4 may be constructed as follows. When the map scale designating means 15 is operated once in the state where the current map is displayed as shown in FIG. 8A,
As shown in FIG. 8B, the actual distance corresponding to the width of the currently displayed map is displayed on the display 11.
The operation of the map scale instructing means 15 after the second time within the specific time is used as a map scale change instruction. The display of the width of the map in that case is as shown in FIG. And
When confirmed by the map scale instruction means 15, the map after the scale change is displayed as shown in FIG. 7 (e). Note that FIG.
When the map scale instructing means 15 is not operated within the specific time in the state of (b), the distance display disappears as shown in FIG. 8 (c), and the original display state is restored.

As described above, even when the map database 13 holds the map data of a single scale, the wide area map /
Switching of the narrow area map is possible. For example, the map database 13 has a width of 8 km and a width of 6 km in FIG.
Consider the case where only the map of is stored. in this case,
It is conceivable to display the entire map having a width of 8 km × a height of 6 km on the display 11 or to enlarge a part of the map. Therefore, the control device 17 calculates an actual scale (distance) corresponding to the width of the map to be displayed, expresses the scale of the map by the distance, and then displays the enlarged map on the display 11. be able to. In this case, the enlarged range can be freely set on the displayed map.

[0030]

According to the present invention, the extent to which the map displayed on the display covers can be easily understood. Also, when changing the scale of the map displayed on the display, it is possible to display the actual scale corresponding to the width of the map that will be displayed on the display after changing the scale, so it will be displayed on the display. The effect is that the scale of the map can be determined while assuming the range of the map.

[Brief description of drawings]

FIG. 1 is a circuit block diagram for explaining a map scale display device of the present invention.

FIG. 2 is an example of a map scale number held in a map database and an image diagram when the map is displayed on a display.

FIG. 3 is an example of an operation sequence in displaying an actual scale corresponding to the width of a map displayed on the display and a screen displayed on the display.

FIG. 4 is a circuit block diagram for explaining another map scale display device of the present invention.

FIG. 5 is an example of an operation sequence and a screen displayed on a display when changing the scale of a map according to the present invention.

FIG. 6 is a display example of an actual scale corresponding to the width of the map to be displayed on the display after changing the scale when changing the map scale.

FIG. 7 is another example of an operation sequence and a screen displayed on the display when changing the scale of a map according to the present invention.

8 is an example of an operation sequence and a screen displayed on a display for explaining a modified example of the device of the circuit block of FIG.

[Explanation of symbols]

1, 11 ... Display, 3, 13 ... Map database, 7, 17 ... Control device, 5 ... Map scale display instruction means,
15 ... Map scale instruction means.

Claims (6)

[Claims] 1. A map scale display method, wherein an actual scale corresponding to the width of the map displayed on the display is calculated and displayed on the display. 2. A map scale, characterized in that, when the scale of a map to be displayed is changed and set, a scale corresponding to the width of the map displayed on the display after the scale of the map is changed is calculated and displayed on the display. Display method. 3. The map scale display method according to claim 1, wherein an actual scale corresponding to a vertical width and a horizontal width of the map displayed on the display is displayed. 4. A display for displaying a map, a map database for holding map data, a map data read from the map database, displayed on the display, and a width of the map displayed on the display. Calculate the scale equivalent to
A map scale display device comprising: a control unit for displaying on the display. 5. The map scale display device according to claim 4, further comprising map scale display instruction means for displaying or canceling a scale corresponding to the width of the map displayed on the display. 6. A display for displaying a map, a map database for holding map data, map scale changing means for changing and selecting a map scale, and map data of the map scale selected by the map scale changing means for the map. A map scale display device comprising: control means for reading out from a database, calculating a map scale of the database, and displaying the map scale on the display.