JP3247730B2 - Drawing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing apparatus for displaying facilities such as gas pipes, water pipes, power lines, communication lines, and fire hydrants on a map together with terrain, using a mapping technique.

[0002]

2. Description of the Related Art The installation status and installation location of underground objects such as gas pipes and water pipes, and facilities such as transmission lines, communication lines, and fireplace hydrants are input together with the topography and saved as map information. In addition, a mapping technology has been developed that allows the necessary equipment to be displayed together with the terrain when needed, and is used for equipment management and planning.

[0003] In the type of business that installs and manages equipment such as underground buried objects and on-ground attachments, about 1/500 of the equipment is installed so that the actual situation of equipment in a relatively small area can be seen in detail. A map with terrain and equipment information entered on a reduced scale is convenient, and in planning work that requires a wide view of the area where construction is planned in the future, such as replacing aging equipment or expanding equipment in response to increasing local demand. It is convenient to use a map of about 1/5000, which is further reduced so that the entire area can be seen.

[0004] In a conventional mapping system, a map is stored as a map of a scale of about 1/500, which is frequently used in equipment management work, and can be drawn at any time. Therefore, it is necessary to create a map of about 1/5000 scale required for planning work based on the map database of about 1/500 scale. However, a map database prepared at about 1/500 scale is required. If you use it to draw at a scale of about 1/5000,
For example, when multiple water pipes are installed along the road, the issued water pipes stick together,
One book is hard to distinguish and is almost useless.

For this reason, conventionally, when a map of about 1/5000 scale is created using a map database of about 1/500 scale, information on terrain such as mountains, rivers and buildings (hereinafter referred to as “ Terrain information) only 1/50
The figures were drawn at a scale of around 00, and information about facilities such as water pipes and gas pipes (hereinafter referred to as "facility information") was written by hand later by a person.

[0006]

However, such a writing operation is troublesome and time-consuming, and is difficult. In addition, there is an oversight of the equipment or a writing error, and when creating map data on a scale of about 1/500. It is necessary to write the same information as the entered equipment information again, which is troublesome twice and extremely inefficient.

[0007] The present invention has been made in view of the above points, and uses a map database prepared in advance at a certain scale, including terrain information and equipment information, and outputs a map that is further reduced. The purpose is to automatically issue a drawing so that the information is not difficult to see.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a map information storage means for storing map information of a predetermined scale comprising topographical information and facility information; Scale setting means for setting the scale, reduction processing means for reducing the map information stored in the map information storage means according to the set scale, and the scale of the release set by the scale setting means is stored in the map information storage. When the map information is smaller than the scale of the map information stored in the means, expansion processing means for expanding the facility information in the map information according to a predetermined rule, and terrain information in the map information are set by the scale setting means. A drawing device is constituted by a drawing device which is drawn out on a reduced scale, and the drawing is performed by expanding the facility information by the expansion processing means.

[0009]

According to the present invention, when a scaled down map is set using the scale setting means when a reduced map is output, the map is stored in the map information storage means by the reduction processing means. The expanded map information is reduced by the set scale, but the equipment information in the map information is extended by the expansion processing means for the drawing interval, and the unexpanded terrain information and the expanded equipment information are output by the drawing means. Are issued together as map information.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of an embodiment of a drawing device according to the present invention.

Reference numeral 10 denotes a host computer. The host computer 10 includes an external storage device 13 which stores a database of terrain information such as mountains, rivers, and buildings, that is, a terrain information database, and an underground buried object or a ground-mounted device. An external storage device 14 storing information on facilities such as objects, that is, a facility information database (hereinafter, a terrain information database and a facility information database are collectively referred to as a "map information database"), and the map information is reduced or expanded into intervals. An external storage device 15 that secures a program area for storing a program for performing an editing process such as an editing process and a work area for storing an intermediate file generated during the process is connected. Reference numeral 11 denotes a terminal device for instructing the host computer 10 to output a map or input a scale to be output, and 12 a plotter device for outputting map information sent from the host computer to recording paper. It is.

In this embodiment, a description will be given of a pipe such as a water pipe buried underground as an example of equipment information.

The present invention relates to a scale (for example, scale 1/50).
0) using a map information database stored at a smaller scale (for example, a scale of 1/500).
At the time of drawing at 0), the topographical information is drawn at a smaller scale, but the equipment information is drawn with the interval expanded.

The basic concept of a method for extending the drawing interval between pipes as facility information in the present embodiment will be described with reference to FIG. Here, the pipe A and the pipe B are objects of the expansion of the interval.

In the map information database, pipe A as equipment information is input as coordinates of points a ₁ , a ₂ , a ₃ , a ₄ on the map, and pipe B is point b ₁ , on the map. The coordinates are input as coordinates b ₂ and b ₃ (in FIG. 2, these coordinate points are indicated by crosses).

In the present embodiment, sections in which the pipes are substantially parallel to each other are subjected to the drawing interval expansion processing. In FIG. 2, sections f and g are subjected to the drawing interval expansion processing. Since the section e is not parallel, it is not subjected to the drawing interval expansion processing. How to determine the parallel section will be described later.

In the process of extending the drawing interval, the coordinate point indicating the position of the pipe is moved. In order to determine the moving direction, an auxiliary point is provided to perform the process.

Therefore, first, in the section f, auxiliary points for processing are created with respect to a line connecting the points a ₂ and a ₃ and a line connecting the points b ₁ and b ₂ (FIG. 2). , Auxiliary points are indicated by white circles). Here, as an auxiliary point for point a _2, from point a _2, making auxiliary point b ₄ to the position intersects pulling the perpendicular to the line segment connecting the points b ₁ and point b _2. Next, point a ₃
Auxiliary point for from point a _3, becomes a position intersected by subtracting the perpendicular to the line segment connecting the points b ₁ and the point b _2, the point b ₂ as already coordinate points of the pipe B is in this position this point b ₂ is the auxiliary points of the point a ₃ because it exists. Similarly, auxiliary point for point b ₂ is a point a _3.

Next, in the section g, from the point b ₂ to the point a
_A perpendicular line is drawn to the line segment connecting point ₃ and point a ₄ , the point of intersection is referred to as auxiliary point a _5, and a perpendicular line is drawn from point a ₄ to the line segment connecting point b ₂ and point b _3, and the point of intersection It is referred to as auxiliary point b _5. In the section g, from the point a ₃ and the point b ₃ , a perpendicular line cannot be drawn on the opposite line segment, so these two points are not processed.

In the expansion process, any one of the pipes is used as an interval expansion reference line, and expansion is performed by moving only the drawing positions of the pipes other than the pipes serving as the interval expansion reference line. In FIG. 2, a description will be given assuming that the pipe A is moved with the pipe B of the two pipes A and B as the interval expansion reference line.

First, in this expansion process, all points on the pipe A are moved in a section where the pipe A and the pipe B are parallel (in FIG. 2, the points after the movement are indicated by black circles). That is, in the section f, the point a ₂ on the pipe A is set to a constant value (interval value) d (for example, 1.5 mm) from the auxiliary point b ₄ on the reference line (pipe B). move on an extension of a direction away from the auxiliary point b ₄ connecting the auxiliary point b ₄ and point a ₂ to a point a _6. Similarly, the point a ₃ on the pipe A
The way length from b ₂ a certain point on the reference line (pipe B) have the same constant value d, to move on to the extension, which also connects the point b ₂ and the point a ₃ in a direction away from the point b ₂ and point a _7. Then, in the interval g, so that the length of the auxiliary points a ₅ on the pipe A from b ₂ a certain point on the reference line (pipe B) is a constant value d, the point b in a direction away from the point b _{2 2} and auxiliary point a ₅
To the point a ₈ moves on an extended line connecting the. Also, point a ₄
For so that the length of the auxiliary point b ₅ located on the same way the reference line becomes a constant value d, to move on an extension of a direction away from the auxiliary point b ₅ connecting the auxiliary point b ₅ and point a ₄ make the point a _9.

As a result of the above expansion process, the pipe A is moved to the position indicated by the dashed line as the pipe A ', whereby the distance between the pipe A and the pipe B is expanded by the distance d. Finally, the coordinates of points a ₁ , a ₆ , a ₇ , a ₈ , and a ₉ on the map are stored in the work area of the external storage device 15 shown in FIG. The process of expanding the diagram interval ends. The drawing interval is extended according to the predetermined rule as described above.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention for executing the above basic concept.
FIG. 4 is a flowchart showing the operation of the drawing interval extension processing of the piping equipment in the flowchart shown in FIG. FIG. 5 is an explanatory diagram of the parallel portion recognition processing (F-1) in the flowchart shown in FIG.

The operation will be described below with reference to the flowcharts of FIGS. 1, 3 and 4.

In order to output a reduced map, first, a scale α (for example, 1) of a map to be output using the terminal device 11 is set.
/ 5000) (S-1), and instructs the host computer 10 to output the reduced map. The host computer 10 reduces the terrain information of the external storage device 13 by a program stored in the external storage device 15 at a reduced scale α,
The data is stored in the work area of the external storage device 15 (S-2).
Subsequently, the external storage device 14 is
Is reduced at the scale α by the program stored in the external storage device 15 and stored in the work area of the external storage device 15 (S-3). Further, in the host computer 10, by using a program stored in the external storage device 15, it is difficult to view the facility information that has been reduced by the scale α accumulated in the work area of the external storage device 15 by widening the interval between the facilities. Perform extended processing to resolve (S
-4).

Here, the process of extending the drawing interval of the equipment will be described with reference to FIG.

In extending the interval between the facilities, first, a portion where the facilities are parallel is recognized (F-
1). Hereinafter, a method of recognizing a parallel portion of equipment will be described with reference to FIG.

In this embodiment, a description will be given by taking a pipe such as a water pipe buried underground as an example of equipment information.

First, each of the pipes H and J is divided into straight portions (line segments), and it is determined whether or not the opposing line segments are parallel. That is, the pipe H is the line segment h ₃ connecting the line h _1, line h ₂ and point s ₃ connecting the point s ₂ and the point s ₃ and the point s ₄ connecting the point s ₁ and the point s ₂ divided into preparative, piping J is divided into a line segment j ₂ connecting the segment j ₁ and the point t ₂ and the point t ₃ connecting the point t ₁ and the point t _2.

Next, the angle formed between each line segment and a predetermined reference coordinate axis (for example, the x-axis of the orthogonal coordinates) is obtained,
The angle between the line segment of the pipe H and the reference coordinate axis, and the pipe J
When the difference between the corresponding line segment and the angle formed by the reference coordinate axis is smaller than a predetermined value, the line segments are regarded as a parallel group. That, k ₁ the angle between the line segment h ₁ and the reference coordinate axes in FIG. 5, the pipe H, the line segment j ₁ and the reference coordinate axis and the angle formed by the pipe J and m _1, both the angle k ₁ and m ₁ it is smaller than the predetermined value [Delta] [theta] (e.g. 4 degrees) with the difference between the line segment h ₁ and the line segment j ₁ is assumed to be parallel groups.

Subsequently, for the line segment h ₂ and the line segment j ₁ ,
The difference between the angle k ₂ and m ₁ that each line segment makes with the reference coordinate axis is Δ
It is greater than theta, line h ₂ and a line segment j ₁ are not parallel groups.

Further, for the line segment h ₃ and the line segment j ₁ ,
Since the difference between the angles k ₁ and m ₁ between each line segment and the reference coordinate axis is smaller than Δθ, the line segment h ₃ and the line segment j _{1 form} a parallel group. Similarly, it examined segment h ₁ and the line segment j _2, line h ₂ and a line segment j _2, whether it becomes parallel group line segments h ₃ and the line segment j _2. As a result, the line segment in FIG. 5 h ₁
And line j ₁ , line h ₃ and line j ₁ , line h ₂ and line j ₂
Can be seen as a parallel group.

As the next processing, in the parallel group thus obtained, when a perpendicular is drawn from the end point of one of the pair of line segments to the other line segment, an intersection exists and the length of the perpendicular line Is shorter, the line segments are set as an extended processing target group. That is, one end point s ₂ of the line h ₁ of the pipe H
Intersection t ₅ when minus perpendicular to the line segment j ₁ piping J existed, and the length p ₁ of the perpendicular line, a certain value Δr
Since (e.g. 0.6 mm) shorter, the line h ₁ and the line segment j ₁ and expansion processing target group.

[0035] In another parallel group, looking at the line segment h ₂ and the line segment j _2, line segment j ₂ from the end point s ₃ of the line segment h ₂
When the perpendicular is drawn, the intersection t ₆ exists, but since the length p _{2 of the} perpendicular is longer than Δr, the line segment h ₂ and the line segment j ₂ are not included in the expansion processing target group.

[0036] Next, the line segment h ₃ and the line segment j _1, because the perpendicular line from the end point s ₃ or s ₄ of the line segment h ₃ to the line segment j ₁ is not closed, the line segment h ₃ and the line segment j ₁ Is not an extended processing target group.

Returning to FIG. 4, for each of the groups recognized as the expansion processing target group in step (F-1), a line segment serving as an interval expansion reference line is determined for the line segments of the members in the group ( F-2). If the number of line segments that became members of the expansion processing group is an odd number, the center line segment in the group is used as the interval expansion reference line,
In the case of an even number, one of the two central line segments in the group is set as the interval extension reference line. Next, in the extension processing target group, a line segment nth away from the interval extension reference line is set to n × L (for example, L is 1.5) from the interval extension reference line.
mm) in the direction away from the interval expansion reference line (F-3). Here, L is a constant value serving as a reference for the width for expanding the interval. In the process of extending the release interval of equipment,
Finally, the information of the equipment whose interval has been extended is stored in the work area of the external storage device 15 (F-4). The processing for extending the drawing interval is performed according to the predetermined rule as described above.

When the processing for extending the drawing interval of the piping equipment is completed, returning to FIG. 3, the reduced terrain information accumulated in the work area of the external storage device 15 is output to the plotter device 12 (S-). 5) The equipment information in which the drawing interval accumulated in the work area of the external storage device 15 in the step (F-4) of FIG. 4 is extended is issued (S-6).

Δθ used in the processing of this embodiment,
Δr and L are used together with α at the beginning of the drawing process.
, Or may be determined in advance.

Here, there is shown an example of a map in which only the piping information is expanded and drawn according to the present invention.

FIG. 6A is an example of a map drawn at a scale of 1/500, and includes terrain information and piping information (three water pipes).
Are shown for easy viewing. However, FIG. 6B is an example of a map obtained by simply reducing the map of FIG. 6A at a scale of 1/5000 and drawing out the map of FIG. 6A without using the present invention. Appearing attached to one. On the other hand, FIG. 6C shows a map obtained by expanding the map at a scale of 1/500 shown in FIG. 6A with only the piping information and drawing the terrain information at a scale of 1/5000 according to the present invention. It is an example.
In this figure, the terrain information is the same as in FIG. 6B, but three water pipes as piping information clearly appear.

In the description of the basic concept described above with reference to FIG. 2, a reference line for extending the interval is set on the pipe B in both the sections f and g. However, in the present invention, a different pipe is set for each section. A reference line for extending the interval may be set above. However, from the point of viewability of the drawing results, it is preferable that the reference line of the interval expansion be set on the same pipe as described above.

In the above embodiment, the piping is described as an example of the equipment information. However, it goes without saying that information other than the piping such as a transmission line and a fire hydrant can be similarly processed as the equipment information.

[0044]

As described above, according to the present invention,
Using a database of map information stored at a certain scale, when drawing at a smaller scale, only the facility information is automatically extended and drawn. In the case where such pipes are installed, even in a reduced map, it is possible to distinguish one pipe at a time and to know how many pipes are installed. Further, according to the present invention, it is possible to automatically output such an easy-to-view map of the facility information. Not only does work become unnecessary, but there is no oversight or writing of equipment, and a map with accurate equipment information can be obtained. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of one embodiment of a drawing device according to the present invention.

FIG. 2 is a diagram showing a method for extending a drawing interval of equipment in the present invention.

FIG. 3 is a flowchart showing the operation of drawing according to the present invention.

FIG. 4 is a flowchart showing an operation of a drawing interval extension process of equipment according to the present invention.

FIG. 5 is an explanatory diagram of a parallel part recognition process required for a drawing interval extension process of equipment in the present invention.

FIG. 6 (a) is an example of a map displayed at a scale of 1/500, and FIG. 6 (b) is a map obtained by simply reducing the map of (a) at a scale of 1/5000 without depending on the present invention. (C) is an example of a map obtained by expanding the map at a scale of 1/500 shown in (a) by only the pipe information according to the present invention and outputting the map at a scale of 1/5000.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Host computer 11 Terminal device 12 Plotter device 13 External storage device 14 External storage device 15 External storage device

Claims (8)

(57) [Claims] 1. A map information storage means for storing map information of a predetermined scale comprising terrain information and facility information; a scale setting means for setting a scale of a map to be displayed; and a storage means for storing the map information in the map information storage means. Reduction processing means for reducing the map information according to the scale set by the scale setting means,
When the scale of the drawing set by the scale setting means is smaller than the scale of the map information stored in the map information storage means, an expansion process for expanding the interval of the facility information in the map information according to a predetermined rule. Means, and drawing means for outputting the topographical information of the map information at the scale set by the scale setting means, and outputting the equipment information at intervals expanded by the expansion processing means. Drawing device. 2. The drawing apparatus according to claim 1, wherein said equipment information is piping information, and said expansion processing means expands an interval only in sections where the piping information is substantially parallel to each other. 3. The drawing apparatus according to claim 2, wherein the extension processing means includes a parallel recognition means for recognizing that the pieces of pipe information are substantially parallel. 4. The drawing apparatus according to claim 2, wherein the extension processing unit recognizes the section as substantially parallel only when the pipe information is opposed in a predetermined section. 5. The drawing apparatus according to claim 1, wherein the extension processing unit temporarily reduces and expands the facility information according to the scale set by the scale setting unit. 6. The expansion processing means, when the equipment information is reduced according to the scale set by the scale setting means, expands the equipment information interval only when the drawing interval between the equipment information is narrower than a predetermined value. The drawing device according to claim 5, wherein: 7. The drawing apparatus according to claim 6, wherein the expansion processing means includes means for setting the predetermined value that is a reference of a narrowness to be subjected to the interval expansion processing. 8. The drawing apparatus according to claim 1, wherein the extension processing means includes means for setting an interval value of the facility information after the interval extension.