JP2615613B2 - Intersection shape creation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a schematic map creation device for drawing and editing a schematic map.

[Prior Art] In the conventional art, when only a rough map is created, when a road is drawn in graphic drawing, two parallel straight lines and a curve are drawn as lines, and these are used as roads. However, the line is always overwritten and the intersection shape is not automatically created.The operator shapes the line segment on the intersection by erasing, rounding, etc., and then
According to the type, the inside of the road was painted in a predetermined pattern.

[Problems to be Solved by the Invention] In the related art, when only a rough map is created, when drawing a road in a graphic drawing, two parallel straight lines and a curve are drawn as a line, and these are drawn as a road. Therefore, it was necessary to draw two straight lines and curves and to fill them with a certain pattern, and many operations were required to create one road.

Also, the line segments of the two drawn roads may not always intersect properly. In such a case,
It was difficult to create a plane intersection.

An object of the present invention is to solve these problems and to easily create a plane intersection between road figures that do not intersect properly.

[Means for Solving the Problems] In order to solve the above problems, the intersection shape creating device according to the present invention draws a road figure which is a map element for indicating a road, a river, a railway, a subway, a tunnel, and the like. Road figure drawing means, an intersection of two road figures drawn by the road figure drawing means, an actual intersection existing on each line segment forming each road figure, and a mutual intersection forming each road figure. A temporary intersection existing on an extension of at least one of the line segments;
At the intersection of the two road figures intersecting at the intersection recognized by the intersection recognition means, and deleting a portion constituting the boundary between the two road figures, and Plane intersection creating means for creating a plane intersection of the two road figures by drawing a part of the part up to the temporary intersection, which does not form a boundary between the two road figures.

[Operation] Since the temporary intersection exists on the extension of at least one of the road figures, the part of the extension that does not form the boundary between the two road figures is drawn to reduce the outline of the plane intersection. I can make up for it. Furthermore, if the part that forms the boundary between the two road figures is deleted, a plane intersection between the road figures can be easily created.

[Examples] Here, the present invention will be described based on examples showing details of the present invention.

FIG. 1 is a diagram showing an intersection shape creating device of the present invention. Reference numeral 1 in the figure denotes an input device for inputting characters, processing instructions, and display coordinate positions. The data input by the input device 1 is classified into two types of command and display coordinates by the command analysis unit 2 and sent to the intersection shape creation device 6 and the display coordinate analysis device 4, respectively. 4, the coordinate position on the display device 3 is calculated and sent as position information to the intersection shape creating device 6 by the position specifying device 5, and the intersection shape creating device 6 performs a predetermined operation based on these commands and position information.

First, when drawing a road according to the instruction, the road type selecting unit 7 selects a road to be drawn from a predetermined pattern such as a road, a river, a railway, a tunnel, a pedestrian bridge, etc., which indicates them. . Further, a plurality of predetermined road widths are selected by the road width designating section 8, and a straight or curved shape is selected by the straight music selecting section 9, and the fact of the road drawing section 10 is transmitted. Here, in the case of a linear shape, the starting point and the ending point are specified by the position specifying device 5, and in the case of a curved shape, the starting point, the ending point and two intermediate points are specified and sent to the road drawing unit 10.

Here, the road drawing unit 10 displays, on the display device 3, a straight road connecting the start point and the end point in the case of a straight line, and a smooth curved road connecting the start point and the intermediate two points and the end point in the case of a curve. While displaying, the existing road and intersection in the road information storage unit 12 are searched by the road information search unit 11, and the intersection with them is verified,
When crossing, the intersection intersection creating unit 13 draws an intersection shape that can be a plane intersection with an existing road or intersection on the display device 3 by the intersection display unit 14, and the road and the intersection drawn by Shintani are stored in the road information storage unit. Store in 12.

If you want to change the intersection shape,
The intersection is designated by 15 and the desired intersection information and the related road information in the road information storage unit 12 are searched by the road information search unit 11 based on this information, and the plane intersection plane of all the roads related to the intersection is referred to. As the plane, the road to be placed on the upper, middle, and lower planes is specified by the road designating unit 12, and the road position designating unit 17 is used to specify whether the plane is to be placed on the upper, middle, or lower plane of the reference plane. Based on the specified road information, the road is deleted from the existing plane, and the roads crossing each other on the upper, middle, and lower planes of the reference plane are crossed with the upper, middle, and lower planes. A new intersection shape is generated by a three-dimensional intersection creating unit 18 for making the lower plane into a three-dimensional intersection, displayed on the display device 3 by the intersection display unit 14, and the intersection in the road information storage unit 12 is newly created. Intersection shape Replace the shape.

FIG. 2 is a diagram showing states of intersections and the like which are prerequisites for explaining an intersection shape creation method in the intersection shape creation device of the present invention.

Here, the intersection point p ₁ · p ₂ · p ₃ straight lines l ₁ · l ₂ · l ₃ is defined as follows.

When the intersection of the p ₁ : 2 straight lines is found and they exist on each other's line segments, this is called the actual intersection.

p ₂ : The intersection of two straight lines is obtained, and if it exists on one line segment and on the extension of the other line segment,
It is called a seed temporary intersection.

p ₃ : If the intersection of two straight lines is found and it does not exist on both line segments, but exists on the extension line of both line segments,
It is called a seed temporary intersection.

Hereinafter, the creation of the shape of the intersection will be described using this name.
Here, the plane intersection creation method will be described first.

FIG. 3 is a diagram showing a state of an intersection in the case of a cross-shaped intersection shape.

Road (l ₁ , l ₂ ) by line segments l ₁ and l ₂ of ( ₁ ) and line segments l ₃ and l ₄
A road (l _3, l ₄₎ each the intersection of each line segment in the case that intersect as shown in FIG _{p 0, p 1, p 2} , p 3 by the road in the case of these or all the actual intersection point (l ₁ , l ₂ ) except for the intersection (p ₀ , p ₂ ) (p ₁ , p
₃₎ Clear the road (l _3, l ₄₎ line segments with the exception of the intersection (p _0,
(p ₁ ) (p ₂ , p ₃ ) is deleted, and the two roads are overlapped to create a shape as shown in (2), which is defined as a plane intersection of the two roads. Also, intersections of a plurality of roads can be created in an equivalent manner.

FIG. 4 is a diagram showing a state of an intersection in a case of a T-shaped intersection shape.

Road (l ₁ , l ₂ ) by line segments l ₁ and l ₂ of ( ₁ ) and line segments l ₃ and l ₄
When the roads (l ₃ , l ₄ ) intersect as shown in the figure, the actual intersections of the line segments are p ₀ and p _2, and the right ends of the line segments of (l ₃ , l ₄ ) are q ₀ and q, respectively. _{If the} type 1 temporary intersection is p ₁ and p ₃ and the line (p ₀ , p ₂ ) excluding the intersection is eliminated from the road (l ₁ , l ₂ ), the road (l ₃ , l ₄₎ ), The line segment (p ₀ , q ₀ ) (p ₂ , q ₁ ) excluding the intersection is deleted, and the two roads are overlapped to form a shape as shown in (2). The shape is a plane intersection. Also, intersections of a plurality of roads can be created in an equivalent manner.

FIG. 5 is a diagram showing a state of an intersection in a case of a T-shaped intersection different from that in FIG.

Road (l ₁ , l ₂ ) by line segments l ₁ and l ₂ of ( ₁ ) and line segments l ₃ and l ₄
When the road (l ₃ , l ₄ ) intersects as shown in the figure, the actual intersection point of each line segment is p _2, and the right ends of the line segments (l ₃ , l ₄ ) are q ₀ , q ₁
If the first kind of temporary intersection is p ₀ , p ₁ , p ₃ , the road (l ₁ , l
₂ ) Delete the line segment (p ₀ , p ₂ ) excluding the intersection from the road, and remove the line (l ₃ ,
l ₄ ) delete the line segment (p ₂ , q ₁ ) except the intersection from (q ₀ , p ₀ )
Is made into a solid line, and the two roads are overlapped to form a shape as shown in (2), which is defined as a plane intersection shape of the two roads. Also, intersections of a plurality of roads can be created in an equivalent manner.

FIG. 6 is a diagram showing a state of an intersection in the case of an L-shaped intersection shape.

Road (l ₁ , l ₂ ) by line segments l ₁ and l ₂ of ( ₁ ) and line segments l ₃ and l ₄
When the road (l ₃ , l ₄ ) intersects as shown in the figure, the actual intersection of each line segment is p _0, and the right ends of the line segments (l ₃ , l ₄ ) are q ₁ , q ₂
If the lower ends of the line segments of (l ₁ , l ₂ ) are q ₃ and q ₄ , the first-type temporary intersection is p ₁ and p ₂ , and the second-type temporary intersection is p ₃ , the road ( l
Line segments (p ₀ , q ₃ ) excluding intersections are deleted from ( ₁ , l ₂ ) (q ₄ , p ₃ )
Is a line segment (p ₀ , q ₁ ) excluding the intersection from the road (l ₃ , l ₄ )
Is eliminated, (q ₂ , p ₃ ) is converted into a solid line, and the two roads are overlapped to form a shape as shown in (2), which is defined as a plane intersection shape of the two roads. Also, intersections of a plurality of roads can be created in an equivalent manner.

FIG. 7 is a diagram showing the state of the intersection in the case of a cross-shaped intersection shape, where the road (l ₃ , l ₄ ) is selected so that the road (l ₁ , l ₂ ) is elevated with respect to the road (l ₁ , l ₂ ) by designation FIG.

Road (l ₁ , l ₂ ) by line segments l ₁ and l ₂ of ( ₁ ) and line segments l ₃ and l ₄
When the roads (l ₃ , l ₄ ) intersect as shown in the figure, the intersections of the respective line segments are p ₀ , p ₁ , p ₂ , and p ₃ , respectively. ₃ , l ₄ ) is selected such that the road (l ₁ , l ₂ ) has an elevated condition with respect to the road (l ₁ , l ₂ ), the line segment (p ₀ , p ₂ ) (p ₀ , p ₂ ) excluding the intersection from the road (l ₁ , l ₂ ) p ₁ , p ₃ ) is eliminated, and the line segments (p ₀ , p ₁ ) (p ₂ , p ₃ ) of the roads (l ₃ and l ₄ ) are drawn thicker to emphasize the elevated state and to increase both roads Are superimposed to create a shape as shown in (2), and this is used as a three-dimensional intersection of two roads. Also, if the elevated conditions of the road (l ₁ , l ₂ ) and the road (l ₃ , l ₄ ) by the line segments l ₃ and l ₄ are reversed, the multiple intersections of multiple roads are created in the same way .

[Effect of the Invention] As described above, according to the present invention, the drawn 2
Even when two road figures do not intersect properly, the plane intersection can be easily created.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an intersection shape creating apparatus according to the present invention. FIG. 2 is a diagram showing states of intersections and the like which are prerequisites for explaining an intersection shape creation method in the intersection shape creation device of the present invention. FIG. 3 is a view showing a state of a plane intersection in the case of the cross-shaped intersection shape of the present invention. FIG. 4 and FIG. 5 are views showing the state of the intersection in the case of the T-shaped intersection shape of the present invention. FIG. 6 is a diagram showing a state of an intersection in the case of an L-shaped intersection according to the present invention. FIG. 7 is a diagram showing a state of a three-dimensional intersection in the case of a cross-shaped intersection shape according to the present invention. 7 ... Road type selection section 8 ... Road width specification section 9 ... Straight track selection section 10 ... Road drawing section 13 ... Plane intersection creation section 14 ... Intersection display section 15 ... Intersection specification section 16 ... Road specification Part 17… Road position designating part 18 …… Override intersection creating part

Claims (1)

(57) [Claims] 1. A road figure drawing means for drawing a road figure which is a map element for indicating a road, a river, a railroad, a subway, a tunnel, and the like, and an intersection of two road figures drawn by the road figure drawing means. Intersection recognizing means for recognizing an actual intersection existing on each line segment forming each road graphic and a temporary intersection existing on an extension of at least one of the line segments forming each road graphic. And at the intersection of the two road figures that intersect at the intersection recognized by the intersection recognition means, erase a portion constituting the boundary between the two road figures and a part of the extension line up to the temporary intersection. An intersection shape creation device, comprising: a plane intersection creation unit that creates a plane intersection of the two road figures by drawing a portion that does not form a boundary between the two road figures.