JP3389006B2 - Earthwork volume control device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to TIN (Triangul).
ed Irregular Network) processing, which is related to the earthwork management device that is controlled so as to better match the current topography.

[0002]

2. Description of the Related Art Hitherto, as a method of processing terrain data and displaying it on a display, an apparatus for performing TIN processing has been proposed.

This is to take in the altitude and coordinate position of a survey point obtained by geodetic actual terrain with a geodetic device as terrain data, plot the survey point in the terrain data on a plane, and plot this Each point is represented as a triangular mesh by drawing a triangular mesh.

Since each vertex of the above triangle is three-dimensional data having Z value information, it is possible to represent a random topography. In this way, the triangular mesh data obtained by the TIN processing becomes the basis of the image processing based on the cross-sectional method or the mesh method (point height method).
By using this triangular mesh data, it is possible to display the terrain based on the cross-section method or display the terrain based on the mesh method.

The outline of the mesh method is as shown in FIG.
A mesh A having a large number of grid points m provided at position coordinates at predetermined intervals on a dimensional coordinate is provided, and a work object is obtained based on the geodetic result of the work object or the work target site for each grid point m. The object or the work site is displayed graphically as shown in FIG.

As for the cross-section method, similar to the mesh method, the concept of linear complementation method is used to cut and pile up the soil volume, construction progress,
The quantity before and after construction can be indexed, and a two-dimensional shape can be obtained with the 2.5-dimensional concept as in the mesh method.

The outline of the cross-section method is to calculate the volume (volume) by adding the front and rear cross-sectional areas of the measured site and dividing by 2 to add up the distances of the front and rear cross-sections. .

As described above, the triangular mesh data based on the TIN processing is the basic data for the terrain display based on the calculation of the sectional method or the terrain display based on the mesh method, and these displays are actually or designed. It is essential that the TIN process is executed accurately in order to accurately match the terrain.

[0009]

However, conventionally, when the area surrounded by the outline M is geodesiced as shown in FIG. 4, each point a as a geodetic point obtained as a result of the geodesic is shown in FIG. 4 (normally, the intervals are randomly distributed in this way), when TIN processing is performed, the outer peripheral points a1 located on the outermost peripheral side are located in the geodetic area as shown in FIG. Although it should be connected by the side (line) E1 along the outer shape line M, as shown in FIG. 6, the outer peripheral point a1 is connected to the inner peripheral point a2 and the side (line) which does not follow the outer shape line M ( (Line) E2 was formed, and a TIN process far from the actual case was executed.

That is, although the outer peripheral point a1 is a determining factor of the outline M of the geodesic area, the TIN processing preferentially determines the sides so as to draw a triangle with the shortest point as the vertex. Since there is a condition, when processing is performed according to this condition, there is an inconvenience that a side E2 that is far from the actual contour line M is set.

Further, as shown in FIG. 7, the TIN process is performed as it is even though there is a residual green area G, that is, a TIN processing exclusion area, which cannot be entered due to the geodetic area in the actual geodetic area. When applied, a side E3 that straddles this residual green space G is set, and TI that does not match the actual situation
In some cases, N treatment was carried out. Such T
This is because in the IN process, as in the case described above, the TIN process is conditionally set so as to connect the points a and a at the shortest position.

Further, in the conventional case, as shown in FIG. 8, when the ridge line S and the valley line T of the geodetic region are present,
As shown in FIG. 9, when the TIN process is performed, the ridge line S and the valley line T
The respective sides E5, E6 of the triangle should be drawn along the line, but if the TIN process is performed as it is, the sides E5, E6 that cross the ridge line S and the valley line T are set as shown in FIG. Since the ridge line S and the valley line T are filled with the triangular surface, the TIN processing that does not fit the actual situation is performed.

The present invention has been made in order to solve the above-mentioned problems. TIN processing is not performed in the remaining green space G, and a triangle that straddles the outline, ridge line, and valley line is not set. At the same time, make sure that a triangle that means a flat ground is not set for the sloping ground,
The TIN processing closer to the actual topography is executed.

[0014]

The invention according to claim 1 is provided with the remaining green area processing means 6 for controlling the TIN processing means 5 so that no side is drawn in the designated remaining green area G.

In the second aspect of the invention, the side defining means 7 is provided for controlling the specified side corresponding to the outline of the survey area so that the side of the triangle is along the specified line.

According to the third aspect of the invention, based on a designated line such as a designated ridge line or valley line, a side of a triangle follows the designated line, and a back-to-back triangle is formed with the designated line as a boundary. The edge defining means 7 for controlling the TIN processing means 5 is provided.

[0017]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. FIG. 1 is a block diagram showing an embodiment of the earthwork amount management apparatus according to the present invention. In FIG.
Is an input means such as a keyboard and a mouse, and is used for inputting construction landform data, construction drawing data, construction specification data, and the like. In addition, the altitude of the topographical measurement point, the coordinate position such as the national coordinates, etc. are also input to the input means 1 as topographical data.

The output 2 such as topographical data from the input means 1 is input to the data processing means 3 and processed by the data processing means 3 to display the processing result based on the output 2 on the display 4.

The data processing means 3 is provided with a TIN processing means 5, and the TIN processing means 5 draws a triangle having vertices between the measurement points to express the terrain with a triangular mesh. It can be said that the triangular mesh is a three-dimensional terrain model constructed based on two-dimensional random geodetic data, and the cross-section method uses the function of cutting out an arbitrary cross-section from this triangular mesh, and the distance from the center on the cross-section line The elevation value is obtained, and the mesh method (point elevation method) similarly obtains the elevation value of the grid point by using the function of obtaining the elevation value of an arbitrary point from the triangular mesh.

Therefore, the display 4 can be displayed according to the processing of the cross section method or the mesh method by performing the processing of the cross section method and the mesh method based on the triangular mesh obtained by the TIN processing means 5.

Reference numeral 6 denotes a residual green area processing means, which does not execute the TIN processing in the residual green area G, as shown in FIG. 7. The triangle side of the triangular mesh is a division line P of the residual green area G. And the other two sides are prevented from stepping into the remaining green space G. The partition line P is represented on the display 4 by a moving path of a cursor based on an operation of a keyboard, a mouse or the like.

Reference numeral 7 is an edge defining means, which is a first edge defining means 7.
a and the second side defining means 7b, the side of the triangular mesh is set along the designated line represented on the display 4 by the movement path of the cursor based on the operation of the keyboard, mouse, etc., and the designated line is also set. The TIN processing means 5 is controlled so as to form a triangle with back to back.

The operation of the above configuration will be described below. First, in FIG. 7, the division line P that divides the outer shape of the remaining green space G is read from the drawing or the like, the cursor is moved so as to be substantially along the division line P, and the display is clicked at an appropriate point b. An operation is performed so that a division line P that connects the points b is drawn on 4. Thus, when a line close to the comparting line P or a matching line is designated, the residual green area processing means 6 does not perform the TIN processing in the residual green area G within the designated line thus specified. , That is, the side E3 of the triangle is not set. In this case, the edge E3 is T so that it follows this designated line.
The IN processing means 6 is controlled.

As a result, the triangular mesh is not formed in the remaining green area G, and the blank area of the triangular mesh is left, so that the TIN processing is performed according to the actual situation of the geodetic survey.

Further, in FIG. 6, the contour line M of the geodetic area
Is read from the drawing or the like, the cursor is moved so as to substantially follow the outline M, and the outline M connecting the point b on the display 4 by clicking at an appropriate point b is clicked.
To draw.

Thus, when a line close to the contour line M or a matching line is designated, the first side defining means 7a causes the sides E2, E2 of the triangle to follow the line designated in this way.
To set.

As a result, as shown in FIG. 5, a triangle having the side E1 set along the outline M is formed, and a triangular mesh is formed in accordance with the actual condition of the terrain.

Further, in FIG. 10, the ridge line S and the valley line T are read from the drawing or the like, the cursor is moved so as to be substantially along the ridge line S and the valley line T, and clicked at an appropriate point b. Then, the ridge line S and the valley line T connecting the points b are drawn on the display 4.

When a line close to the ridge line S or the valley line T or a matching line is designated, the second side defining means 7b causes the sides of the triangle to follow the designated lines. E
Set 5 and E6. In this case, since the ridge line S and the valley line T are input to the second side defining means 7b, based on this input, the triangles that are back to back with the ridge line S and the valley line T as boundaries are set. Control so that
The triangular mesh is as shown in FIG. 9, and a triangle that straddles the ridge line S and the valley line T will not be set. That is, the ridge line and the valley line are not set on a flat surface.

In the above description, one side of the triangle is set so as to be along the contour line M, the ridge line S, and the valley line T. However, the present invention is not limited to such lines, and other indicator lines, for example, one side of the triangle. Setting along the contour lines of the terrain is also included in the present invention.

In the present invention, the designated line such as the outline M is not limited to being input by the cursor, and may be input by the touch pen. The triangle formed by the sides (lines) connecting the measurement points is set as close to an equilateral triangle as possible. In other words, the measurement points near the vertices that draw a regular polygon are selected and connected by edges.

[0032]

As described above, in the invention according to claim 1, the remaining green area processing means 6 for controlling the TIN processing means 5 so that no side is drawn in the designated remaining green area G.
Equipped with. For this reason, since a blank area of the triangular mesh can be left in the remaining green space, it is possible to form the triangular mesh that matches the actual situation of the geodetic.

In the second invention, the side defining means 7 is controlled based on the designated line so that the side of the triangle is along the designated line.
Was set up. For this reason, the outer shape of the triangular mesh can be set so as to match the outer shape line.

According to the third aspect of the invention, based on a designated line such as a designated ridge line or valley line, a triangle side is formed along the designated line, and a back-to-back triangle is formed with the designated line as a boundary. The edge defining means 7 for controlling the TIN processing means 5 is provided. Therefore, the ridge line and the valley line are not set as flat surfaces.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an earthwork amount management apparatus of the present invention.

FIG. 2 is a plan view showing an example of a mesh method.

FIG. 3 is a perspective view showing an example of a mesh method.

FIG. 4 is a plan view for explaining the present invention and the related art.

FIG. 5 is a plan view for explaining the present invention and the related art.

FIG. 6 is a plan view for explaining the present invention and the related art.

FIG. 7 is a plan view for explaining the present invention and the related art.

FIG. 8 is a perspective view for explaining the present invention and the related art.

FIG. 9 is a plan view for explaining the present invention and the related art.

FIG. 10 is a plan view for explaining the present invention and the related art.

[Explanation of symbols]

1 Input means 3 Data processing means 4 displays 5 TIN processing means 6 Residual green space treatment means 7 side definition means

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-6-36013 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01C ⁷ /00-7/06 G01D 21 / 00-21/02 G06T 1/00 G06T 17/40-17/50

Claims (3)

(57) [Claims] 1. A plurality of measurement points such as the altitude of the measured area
TIN that connects the sides that draw a triangle to form a triangular mesh
An earthwork amount management apparatus comprising a processing means 5, characterized by further comprising a remaining green area processing means 6 for controlling such that the above side is not drawn in a designated remaining green area G. 2. A plurality of measurement points such as the altitude of the measured area are
TIN that connects the sides that draw a triangle to form a triangular mesh
The earthwork management apparatus provided with the processing means 5 is characterized in that a side defining means 7 is provided for controlling a specified side corresponding to an outline of the geodetic area so that a side of a triangle follows the specified line. Earthwork amount management device. 3. A plurality of measurement points such as the altitude of the measured area
TIN that connects the sides that draw a triangle to form a triangular mesh
In the earthwork amount management device provided with the processing means 5, based on a designated line such as a designated ridge line or valley line, a side of the triangle is along the designated line, and a back-to-back triangle is formed with the designated line as a boundary. An earthwork amount management device characterized in that a side defining means 7 for controlling so as to be provided is provided.