JPH0519685A - Distance information display control method of map information system - Google Patents

Abstract

PURPOSE:To improve the usability by displaying a circle centering on an indicated place to size corresponding to the scale of a map and visually grasping distances between plural points. CONSTITUTION:When a center point is indicated and inputted (101), a processor calculates the center position on the display map (102). Then when an operator inputs information on a display scale, e.g. 1 cm through an input device (103), the processor generates the circle of the inputted display scale centering on the calculated position to, for example, a 1cm radius (104). At the same time, the processor calculates the actual distance unit corresponding to the display scale, e.g. 10km according to the scale of the display map (105). The calculated actual distance unit information is given to the generated circle and displayed on a display device (106). Namely, the distance from the optional point is displayed with the circle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distance information display control method in a map information system, and in particular, a map suitable for an operator to easily recognize the distances between a plurality of points on a map screen. The present invention relates to a distance information display control method for an information system.

[0002]

2. Description of the Related Art In recent general-purpose information processing systems and various control systems, a graphic display is used as an interface between an operator and a computer so that the information of the computer can be easily transmitted to the operator. There are many. A map information system is one of the systems using such graphic display. The map information system collects geographical information and analyzes and processes it, for example, as described in pages 1991 to 1993 of "Electronic Information and Communication Handbook" edited by the Institute of Electronics, Information and Communication Engineers (1988, published by Ohmsha). Is a system for
It is used as map information such as city planning maps and basic land maps in city information systems for the purpose of supporting city planning operations of local governments, emergency disaster prevention systems such as police and fire departments, and traffic completion systems.

Conventionally, with respect to the display of distance information in such a map information system, there has been a method of displaying only a reduced scale of a displayed map or displaying the distance between target points by a numerical value. With this method of displaying distance information, the distance from a certain point to multiple points can be roughly
If you want to grasp and compare in a short time, there are the following inconveniences. That is, for example, in the method of displaying only the reduced scale of the displayed map, the operator measures the distance between points on the map displayed on the display device, and the measured value is actually measured according to the reduced scale. I had to convert to the distance. Further, even when the distance information is displayed numerically, the operator has to work efficiently because the points must be sequentially specified.

[0004]

The problem to be solved is that in the conventional distance information display method, the operator is
The point is that the distance between a plurality of points on the displayed map screen cannot be grasped efficiently in a short time. An object of the present invention is to graphically display the distance between points on a display map,
Provided is a distance information display control method for a map information system which solves the problems of these conventional techniques and enables an operator to visually and efficiently grasp the approximate distance between a plurality of points on a displayed map. It is to be.

[0005]

In order to achieve the above object, a distance information display control method of a map information system according to the present invention comprises an input device for inputting an operation instruction from an operator,
A map information storage device that stores map information of a predetermined reduced scale; and a processing device that performs processing on the map information stored in this map information storage device based on instructions from the operator input via the input device. A distance information display control method of a map information system, comprising a display device for displaying a processing result for the map information of the processing device,
On the display map displayed on the display device, from the step of calculating the positional information of one point specified by the operator and the display scale information input by the operator via the input device, the actual distance unit corresponding to the scale of the map is calculated. A circle (circle) of the display scale centered on one point on the map screen specified by the operator is displayed on the display map together with the actual distance unit based on the calculation step, the display scale information and the position information. And a step.
(2) In the distance information display control method of the map information system described in (1) above, a scale reduction scale of the map is calculated from an actual distance unit input by the operator instead of the display scale information via the input device. Is calculated, and the circle is displayed on the display map together with the actual distance unit on the basis of the calculated display scale information and the position information. (3) In the distance information display control method of the map information system described in (1) above, the operator calculates a distance between the center point and a second point different from the center point designated on the displayed map. , Instead of the display scale information input by the operator via the input device, the distance calculated here is used to calculate the actual distance unit, and a circle whose radius is the distance between the second point and the center point is calculated. , Is displayed on the display map together with the actual distance unit.

[0006]

In the present invention, the distance between points on the displayed map is graphically displayed using a circle. Then, the size of the circle displayed on the displayed map, that is, the radius, indicates the distance from the center point, and the operator can visually capture the distance information on the map, and it corresponds to one point. It is possible to grasp and compare the approximate distances of multiple points in a short time. Further, by displaying circles having different radii on the same display map, it is possible to more easily grasp the distances between a plurality of points corresponding to one point. As a method for designating the size of the circle, for example, a method of designating with a display scale such as "1 cm" or "2 cm" or "10 k"
A method of designating an actual distance unit such as “m” or “20 km” or a method of calculating from the distance between the center point and a target point may be used.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a flow chart showing an embodiment of the distance information display control method of the map information system of the present invention. The processing of this embodiment includes an input device for inputting operation instructions from an operator, a map information storage device for storing map information of a predetermined reduced scale, and an instruction from the operator input via the input device. A processing device that performs processing on the map information stored in the map information storage device based on
A map information system including a display device for displaying a processing result of the map information of the processing device is used. First, if there is an instruction input of the center point from the operator via the input device on the display map displayed on the display device (step 1
01), the processing device calculates the center position on the displayed map (step 102). Then, via the input device,
Display scale information from the operator, for example, "1c
If "m" is input (step 103), the processing device
With the position calculated in step 102 as the center, the circle (circle) of the input display scale, for example, the radius is “1c
A circle of "m" is created (step 104). At the same time, the processor determines the actual distance unit corresponding to this display scale (1 cm) based on the scale of the display map.
For example, it is calculated as “10 km” (step 10
5). Then, the calculated actual distance unit information is added to the circle created in step 104 and displayed on the display device (step 106). It should be noted that the operator can display the circles in a concentric pattern by inputting a plurality of pieces of display scale information. In this way, the map information system of this embodiment displays the distance from any one point as a circle. This allows the operator to
The distances from one point to multiple points can be easily determined and compared. Incidentally, the method of inputting the information of the display scale according to the present invention is the method of inputting the radius of the circle (for example, 1 cm, etc.) as in the present embodiment, but as shown in FIG. Unit (eg 10
Alternatively, the input method may be performed by designating a point on the circumference of the circle. Further, the concentric circles or the areas of the circles may be represented by different colors or shades to make distance information easier to see. Further, in the present embodiment, the operator inputs information of a plurality of display scales as a method of displaying a plurality of circles in a concentric circle shape.
The operator, like the map information system described in
A method of specifying the number of the circles may be used.

FIG. 2 is a block diagram showing an embodiment of a configuration relating to the present invention of a map information system used for implementing the distance information display control method of the present invention. The map information system of this embodiment includes an input device 10 including a keyboard and a mouse for inputting operation information of the map information system from an operator, a display device 9 for displaying a processing result, and map information displayed on the display device 9. Map information storage unit 6 for storing
And a processing device 1 that extracts map information stored in the map information storage unit 6 based on an input from the input device 10 and outputs the map information to the display device 9. further,
The processing device 1 searches the map information storage part 6 for the target map information based on the input from the input device 10, and the map information display device 9 which searches the map information search part 7 for the map information. A map information display control unit 8 for controlling display on the display device, and an operator according to the present invention, input device 1
A circle information storage unit 2 that stores circle information corresponding to distance information input via 0, a circle information search unit 3 that searches the circle information storage unit 2 for circle information corresponding to distance information, and a display device 9 Calculation of the center point of the circle instructed by the operator via the input device 10 on the display map displayed in FIG.
Display scale information entered via 0, eg 1 cm
Etc., the size of the circle on the displayed map, the unit of the circle corresponding to the reduced scale of the displayed map, ie, 10k
It is configured by a circle center / unit calculation unit 4 that calculates an actual distance such as m, and a circle creation unit 5 that creates a circle based on the information calculated by the circle center / unit calculation unit 4. With such a configuration, the map information system of the present embodiment, on the display map, centering on an arbitrary point specified by the operator, a plurality of circles of any width, concentrically, and of each circle A unit, for example, 10 km or the like is added and displayed with actual distance information.

The processing operation of the map information system of this embodiment according to the present invention will be specifically described below with reference to the map information and circle information shown in FIGS. still,
3 is an explanatory diagram showing an example of the map information stored in the map information storage unit in FIG. 2, and FIG. 4 is an example of a display map in which the map of FIG. 3 is displayed on the display device in FIG. 5 is an explanatory view showing an embodiment of the circle information stored in the circle information storage unit in FIG. 2, and FIG. 6 is a display state of the center point designated by the operator on the display map in FIG. FIG. 7 is an explanatory diagram showing an example of the distance information display map displayed by the map information system in FIG. 1. The map information storage unit 6 previously stores the map information 31 shown in FIG. 3 and its scale information, for example, 1/500 (1/500).
In the circle information storage unit 2, the width 57 and the circle number 58 of each circle 51 to 56 shown in FIG.
It is assumed that the circle information consisting of (1 to N) is stored. First, the map display instruction input by the operator via the input device 10 is temporarily stored in the map information search unit 7 via the map information display control unit 8. Then, the map information search unit 7 searches the map information storage unit 6 and
The map information 31 shown in and the scale information thereof are selected. The map information display control unit 8 uses the map information 31 of FIG. 3 selected by the map information search unit 7 as the display map 41 shown in FIG.
It is displayed on the display device 9. At the same time, the map information display control unit 8 sends the scale reduction information to the circle center / unit calculation unit 4
Pass to. The circle center / unit calculation unit 4 temporarily stores the received reduction scale information, and at the same time, calculates the circle center information input by the operator via the input device 10.
The position information of the center point of the circle on the displayed map is calculated by fetching it through the map information display control unit 8 and sent to the map information display control unit 8. The map information display control unit 8 displays the display map 61 provided with the center point 60 of the circle, as shown in FIG. 6, based on the position information of the center point of the circle sent from the circle center / unit calculation unit 4. It is displayed on the device 9.

Further, the circle information search unit 3 selects the circle width 57 and the circle number 58 shown in FIG. 5 from the circle information storage unit 2, and the circle center / unit is selected via the map information display control unit 8. It is sent to the calculation unit 4 and the circle creation unit 5. Then, the circle center / unit calculation unit 4 receives the circle width 57 and the circle number 58 shown in FIG. 5 (the circle number “N” of the largest size circle has the same value as the number of circles). ,
The actual distance unit of the circle displayed on the display device 9 is calculated. Here, a method of calculating the actual distance unit of the circle 51 of FIG. 5 will be described. For example, if the width 57 of the circle is "a
(Cm) ", the circle number 58 is" x ", the map scale is" 1 / b ", and the actual distance unit of the circle number" x "is" Sn (km) ".
Then, Sn = (a) × (b) × (x) / 100000 (km) (1) The circle center / unit calculation unit 4 sequentially calculates the actual distance units of the circle by the number of the circles according to the equation (1), and the calculated information of the actual distance units is given to the circle creation unit 5 Send to. The circle creation unit 5 receives the information on the actual distance unit of the circle calculated by the circle center / unit calculation unit 4, and based on the scale width 57 and the number of scales (scale number 58) input by the operator, Circles 51-5 shown in
Each of 6 is created as follows. For example,
The circle number 58 is "x", the circle number 58 is "x", the radius of the circle is "Rn (cm)", and
When the width 57 of the circle is “a (cm)”, Rn = (a) × (x) (cm) (2). Circle creation unit 5 has a circle number of "1"
From the circles, the radii are sequentially calculated by the equation (2), the circles are created based on the radii, and the processing is performed by the number of circles, and the circles are combined into concentric circles. Further, the circle creation unit 5 synthesizes the actual distance unit (“Sn”) of each circle and each of the circles 51 to 56, and sends them to the map information display control unit 8. The map information display control unit 8 displays the display map 41 shown in FIG. 4, the center point 60 of the circle shown in FIG. 6, and the circles 51 to 56 shown in FIG. 5 in FIG. 7 (the number of circles is 5). In the case of), the result is combined and the result is displayed on the display map 7.
It is displayed as 0 on the display device 9. In FIG. 7, S on the circumference of each circle 71 to 75 of the display map 70
_{1 to} S ₅ are actual distance units from the center point 60 of each circle, and are numerical values such as 10 (km) and 50 (km). The above processing is sequentially and repeatedly executed according to the operator's request. And the operator
When the movement of the center point of the circle is instructed, the center point of the circle is repeatedly calculated and the above processing is repeated, whereby the circle can be moved continuously.

Note that the distance information display control method of the present invention is limited to creating and displaying a circle by obtaining the actual distance unit of the circle and the radius of the circle from the width of the circle and the number of circles. Not something, for example,
It is also possible to create a circle by finding the width of the circle from the distance between the actual distance units of the circle. For example,
The width "a (cm)" of the circle is calculated from the actual distance unit interval "S ₁ " of the circle by the above equation (1) as follows. a = (S ₁ ) × 100000 / (b) (cm) (3) Further, the width of the circle is obtained by the operator by calculating the distance between the center point designated on the displayed map and another point. Is also possible. In this case, according to the calculated circle width (“a (cm)”) and the reduced scale (“1 / b”), the actual circle of the circle is calculated by the following equation (4) as in the above equation (1). The distance unit interval "Sn (km)" is calculated. Sn = (a) × (b) / 1000000 (km) (4) Further, the map information stored in the map information storage unit 6 is not limited to the map shown in FIG. 3 and is applied to all maps. it can. In addition, as for the circles to be displayed on the display map, many circles with different numbers of circles are prepared in the circle information storage unit 2, so
You can change the density of the circle. Also, the circle is not limited to being displayed by a line,
Circles can be displayed by changing display attributes such as changes in color and shade. Also, by displaying a plurality of circles at a time, it is possible to change the interval between the circles only partially.

As described above with reference to FIGS. 1 to 7, according to the distance information display control method of the map information system of the present embodiment, when the map is displayed on the display device, the location designated by the operator is displayed. A circle representing the distance according to the scale factor of the map centered on is displayed directly on the displayed map. As a result, the operator can visually grasp the distance information on the map, grasp the approximate distance from a certain point to a plurality of points in a short time, and compare them.

[0013]

According to the present invention, on the map displayed on the display device, a circle having a size corresponding to the reduction scale of the map,
The location indicated by the operator is displayed as the center, and the operator can visually grasp the distance between multiple points on the map and efficiently grasp the distance, thus improving the usability of the map information system. Is.

[0014]

[Brief description of drawings]

FIG. 1 is a flowchart showing an embodiment of a distance information display control method of a map information system according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a configuration according to the present invention of a map information system used for executing the processing in FIG.

FIG. 3 is an explanatory diagram showing an example of map information stored in a map information storage unit in FIG.

4 is an explanatory diagram showing an example of a display map in which the map of FIG. 3 is displayed on the display device of FIG.

5 is an explanatory diagram showing an example of circle information stored in a circle information storage unit in FIG. 2. FIG.

6 is an explanatory diagram showing an example of a display state of a center point designated by an operator on the display map in FIG.

FIG. 7 is an explanatory diagram showing an example of the distance information display map displayed by the map information system in FIG.

[Explanation of symbols]

1 Processing device 2 Circle information storage unit 3 Circle information search unit 4 Circle center / unit calculation unit 5 Circle creation unit 6 Map information storage unit 7 Map information search unit 8 Map information display control unit 9 Display device 10 Input device 31 Map information 41 Display maps 51 to 56 Circle 57 Circle width 58 Circle number 60 Center point 61 Display map 70 Display map 71 to 75 Circle S _{1 to} S ₅

Claims (3)

[Claims] 1. An input device for inputting an operation instruction from an operator, a map information storage device for storing map information of a predetermined reduced scale, and an instruction from the operator input via the input device. On the basis of the above, in the distance information display control method of the map information system, which comprises a processing device for processing the map information stored in the map information storage device and a display device for displaying a processing result for the map information of the processing device, On the display map displayed on the display device, the step of calculating the position information of one point specified by the operator, and the display scale information input by the operator via the input device, the actual distance corresponding to the reduced scale of the map. A point on the map screen specified by the operator based on the step of calculating the unit and the display scale information and the position information. And a step of displaying the circle of the display scale with the center point as the center point on the display map together with the actual distance unit. 2. The distance information display control method for a map information system according to claim 1, wherein the map is calculated from the actual distance unit input by the operator in place of the display scale information via the input device. Calculating the display scale information corresponding to the reduction scale of the, based on the calculated display scale information and the position information, the circle,
A distance information display control method for a map information system, characterized by displaying on the display map together with the actual distance unit. 3. The distance information display control method for a map information system according to claim 1, wherein a second point different from a center point of the circle designated by the operator on the display map, and the center point. The distance is calculated, the actual distance unit is calculated using the calculated distance instead of the display scale information input by the operator through the input device, and the second point and the center point are calculated. A distance information display control method for a map information system, characterized in that a circle whose radius is the distance to is displayed together with the actual distance unit on the display map.