JP2619394B2 - How to correct drawing data - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing and map information processing system, and more particularly to a data correction method suitable for matching a plurality of drawings.

[Conventional technology]

Conventionally, there have been many announcements of a system in which various facility drawings such as electric power, water, and gas are superimposed on a map as a background and input into a computer to perform various processing such as history management and simulation. Have been. (For example, Pixel No. 18, published by Graphic Processing Information Center, March 18, 1984) [Problems to be Solved by the Invention] In the above-mentioned conventional system, since it is dedicated for each purpose, it is stored in each system. Background map
Even in the same scale and the same area, the coordinate system of the page boundary is different, or the shape of an element such as a building or a road is different even in the same place. Therefore, even if you try to use the facility data that was valid in one system in another system, there is a problem that it is very difficult to take measures for the facility element, such as the facility element originally on the road passing through the building. Had occurred.

An object of the present invention is to solve such a problem and to provide an effective correction method for making correspondence between various drawings and maps.

[Means for solving the problem]

The purpose of the above is to add the correspondence between major elements such as road and block boundaries after absorbing the gap such as the page boundary between the two background maps, and the facility drawing is based on the correspondence between the major elements of the background map, This is achieved by applying a quasi-linear transformation to the elements in the facility drawing.

[Action]

By the above means, even if there is a shift between the background maps, the facility data can be utilized between the systems, and the consistency management of the database is improved, and the data compressibility is improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, as shown in FIG. 2, a method for correcting a part of a group of facility drawings I created for a certain purpose so as to correspond to a group of facility drawings D created for another purpose will be described. I do. In the facility drawings of each I and D in FIG.
It is assumed that the information is managed in a multilayer structure having background components such as a house map and facility parts such as electric power, water and gas by the method described in Japanese Patent Application Publication No. 0-38725. Therefore, the conversion target is specifically the facility component indicated by the curly brackets in the facility drawing I group, which is corrected so that there is no inconsistency in correspondence with the background component in the facility drawing D group. The purpose is to do. Hereinafter, the contents of the correction processing will be described in order.

First, maps that are generally used as background components in facility drawings often do not match even if the same scale and range of the same district are specified, as shown in FIG. Rotation (θ) and deviation of coordinate reference position (XF, Y
F) exists. Such a shift between the background maps makes it impossible to clarify the range of the data to be corrected. Therefore, the range is clarified by the range extraction processing according to the above-cited Japanese Patent Application No. 60-38725. In this case, since the facility components correspond one-to-one as the background map components, the range extraction process may be considered using the map components. The basic principle of this range extraction process is to completely cover a certain rectangle with another rectangle of another shape, make it continuous, and then consider it as a problem of re-dividing again.The outline of the process flow is as follows. As shown in FIG. That is,
First, the reference point offset (XY, YF) and the coordinate axis inclination angle θ are obtained by comparing the macro page boundary coordinate system between the facility drawing groups I and D (STEP 01). Next, paying attention to a specific page (for example, page D10 in FIG. 3) of the facility drawing D group, all pages having a superimposed relationship with the page are extracted from the facility drawing I group (see page D10 in FIG. 3). Pages having a superimposition relationship [I07, I08, I09, I12, I13]) The pages are listed (STEP 02). The bonding is performed at each boundary position of all the pages listed in this manner (STEP 03).
The specific contents of this bonding process will be specifically described with reference to FIG. FIG. 5 is an enlarged view of a part of FIG. 3, in which two adjacent pages I07 and I08 overlapping page D10 are indicated by line L ₇₁ (P ₇₁ P ₇₂ P ₇₃ P ₇₄ ) and line L, respectively. ₈₁ shows a case where _{(P 81 P 82 P 83 P} 84) and is present, bonding process is to continuously the figure ranging between such multiple pages. So as the storage form of line drawing, as in the Figure 6 the line L ₇₁ (a), the line L ₈₁ is FIG. 6 (b), it is assumed that the invariant length records arranged each coordinate data by configuration number. In this case, what contacts the I07 page boundary of the coordinates of the line L _71, a P ₇₁ and P _74, those in contact with the I08 page boundary of the coordinates of the line L _81, P ₈₁ and P ₈₄
It is. In addition, as apparent from FIG. 5, the coordinates on the boundaries of these pages have a relationship of P ₇₂ = P ₈₁ (= P ₁₀₀ ; a point for considering both of them the same) P ₇₄ = P ₈₄ . Moreover, since the vector ▲ ▼ and ▲ ▼ and parallel, yet forms a straight line, P ₇₄ or P ₈₄ can be regarded as a point on the line, on the figure after coupling can be omitted. From such characteristics, (c) obtained by fusing FIGS. 6 (a) and 6 (b) is obtained. This (c) can be regarded as a table for registering continuous line figures after the pages I07 and I08 are pasted together.

Next, a group of facility drawings I (FIG. 3 [I107, I08, I09, I12, I
13)), the range within the cage boundary of interest (the boundary of page D10 in FIG. 3) of the facility drawing D group is subdivided and extracted (STEP 04). The specific processing contents will be described with reference to FIG. 5 and FIG. By the page pasting process up to the previous stage, a continuous line L ₁₀₀ (P ₁₀₀ P ₈₂ P ₈₃ P
₇₃ P ₇₂ P ₁₀₀ ) is obtained. However, this line L _100, since outside of the page D10 to be corrected target (P ₁₀₁ P ₈₂ P ₁₀₂₎ is present, extracts a portion that exists within the range.
Specifically, determined the four line segments forming the boundary of the D10, the intersection of the figure to be extracted for (P _101, P _102), dividing the line by the line connecting the intersections. Then, only the components included in the surface corresponding to page D10 are left. Lines L ₁₀₀ extending between the page shown in by connexion Figure 6 in the process (c), the extraction of the portion contained within the D10 page is performed, the result is as shown in Figure 6 (d).

By the above range extraction processing, the range of the facility drawing I group to be corrected is clarified. Next, a description will be given of a method of coping with a reference necessary for performing the correction processing. Generally, a particular facility component in a facility drawing group is written so as to completely belong to the road region of the background map component. Therefore, the correspondence between the groups I and D will be examined using the road boundary as a reference for correction. However, in general, a house map used as a background map component does not have a concept of a road boundary and is shared with a block boundary and a building boundary. In addition, as shown in FIG. 1, there is a difference between the blocks of the background map components of the group I and the group D even at the same scale and the same area. (The solid line in Fig. 1 is group D and the broken line is I
As a method of coping with such line-districted line figures which show a group block, respectively, a method of coping with line figures as already clarified by a character recognition technique or the like is conceivable (for example, reference communication electronic communication). Special Issue Voting
lJ68-D No. 4 (1985) various methods).
However, as is considered in the present embodiment, when the deviation between the line figures to be associated is small, the degree of the correspondence method using the centroid distance of each block line figure is sufficient. For example, in FIG. 1, the block diagram of the group I (IA01, IA02, IA0
3, IA04) to the block line figure of group D (DA01, DA02, DA03, DA0
In order to make correspondence with 4), the distance between the centroids of each line figure is checked, and D is determined so that the minimum distance is obtained.
Find block pairs between group and group I. (In FIG. 1, pairs to be obtained are (IG01, DG01), (IG02, DG02), (ID03, D
G03), (IG04, DG04)). Next, by paying attention to each side between the D-group and I-group block-shaped closed figures, and examining a simple adjacent relation by comparing the distances between the respective sides, the sides forming each block-closed figure are obtained. Find micro correspondence between (For example, the side の of the group D closed figure DA02 in FIG. 1 has a correspondence with the side ▼ of the group I closed figure IA02), while in the facility drawing group of either the group D or the group I Then, the correspondence between the sides of the closed block figure forming the road is determined. To ask for this,
It is obtained by examining the adjacency by comparing the distances between the sides of the closed figure as in the previous step. (For example, the first
Focusing on the facility drawing group in Figure D group, the neighborhood of block DA02 ▲
▼ side of DA04 block ▲ ▼
Is an adjacency across a guideway). Then, an area based on a quadrilateral is defined by using sides that are adjacent to each other with these conductive paths interposed therebetween. (For example, consider the area DP22DP23DP44DP41DP22 which forms a guide boundary using the sides ▲ and ▲ ▼ of the closed shape of the group D block while the sides ▲ ▼ and ▲
Similarly, in the case where ▼ is used, an area IP22IP23IP44IP41IP22 which forms a road boundary is obtained, and the two have a correspondence relationship as indicated by hatching in FIG. 7) By the above-described processing of coping with the adjacent relationship across the guideway, the guideway region is divided as shown in FIG. When such a correspondence between the block areas is established, the following quasi-linear conversion equation between quadrilaterals is established. For example, the seventh
In the figure, if the coordinate system of the quadrilateral IP22IP23IP44IP41IP22 is (x, y) and the coordinate system of the quadrilateral DP22DP23DP44DR41DP22 is (x, y), Is established.

However, the coefficients (a ₁ , b ₁ , c ₁ ,
d ₁ , a ₂ , b ₂ , c ₂ , d ₂ ) are the coordinate values (x ₁ , y ₁ ) (x ₂ , y ₂ ) (x ₃ ,
y ₃ ) (x ₄ , y ₄ ) and the coordinate values (x ₁ , y ₁ ) (x ₂ , y ₂ ) (x ₃ , y ₃ ) (x ₄ , y ₄ ) of the destination quadrangles DP22 to DP44 ) Can be uniquely obtained. Then, the elements of the facility drawing arranged inside these quadrilaterals are corrected so as to be quasi-linearly the facility drawing of another quadrilateral region.
However, in general, when such correction processing is performed in units of regions, minute discontinuous portions as shown in FIG. 8 are generated at the boundary positions of the respective regions. Therefore, a completely corrected data can be obtained by simply making a correction to take the midpoint position of the discontinuous portion.

〔The invention's effect〕

As described above, according to the present invention, even when there is a shift between the background maps, the entire correction processing is realized by combining the local correction processing for each region, and a highly accurate correction result is obtained. Has the effect of

[Brief description of the drawings]

FIG. 1 is a principle diagram showing the correspondence between block areas, FIG. 2 is a diagram for clarifying the correspondence of the correction processing, FIG. 3 is a diagram for explaining the displacement of the page boundary of the background topographic map, and FIG. FIG. 5 is a diagram showing a flow of processing for eliminating the displacement of the boundary, FIG. 5 is an enlarged view of FIG. 3, and is a principle diagram for explaining the bonding and extraction of a line extending between pages, and FIG. FIG. 7 is a diagram showing a format for storing each figure shown in FIG. 7, FIG. 7 is a diagram showing correspondence of a target area for performing quasi-linear conversion for correction, and FIG. 8 is generated at each page boundary of the area after quasi-linear conversion. FIG. 4 is a diagram illustrating a state of a discontinuous portion and a correction position thereof.

Claims (6)

(57) [Claims] 1. A method for correcting drawing data created with a first drawing as a background to a drawing with a second drawing as a background, comprising means for storing drawing data as a figure of a coordinate sequence. After giving the correspondence of a specific figure common between the backgrounds, dividing the image into a plurality of regions based on the correspondence, performing correction processing in units of the regions, and performing continuity at the region boundaries. Correction method of figure data to be performed. 2. A method for correcting drawing data according to claim 1, wherein when the page boundary of a spatially continuous drawing such as map data does not match as said background drawing, inter-page continuity is established. And performing a re-division process in advance. 3. A drawing data correction method according to claim 1, wherein a quasi-linear conversion is performed when the correction processing is performed in units of the divided areas. Correction method. 4. A method for correcting drawing data according to claim 1, wherein said method is performed while interactively indicating a correspondence relationship of a specific graphic common between said backgrounds. Method. 5. A drawing data correcting method according to claim 1, wherein a block outline drawing or a road boundary map of a topographic map is used as the specific graphic common between the backgrounds. Data correction method. 6. A method for correcting drawing data according to claim 5, wherein only an area in a road portion among said divided areas is to be corrected.