Three-dimensional terraced field modeling method based on TIN

A modeling method and terraced field technology, applied in 3D modeling, instruments, calculations, etc., can solve problems such as difficult optimization of earthwork volume, difficulty in controlling the shape of terraced fields, and changes in model accuracy, so as to achieve accurate 3D terraced field models and easy excavation and filling The effect of balance and small offset distance

Active Publication Date: 2019-01-11
PANZHIHUA UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a TIN-based three-dimensional terrace modeling method to solve the problem that the current terrace modeling methods are all based on the digital elevation mode

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  • Three-dimensional terraced field modeling method based on TIN
  • Three-dimensional terraced field modeling method based on TIN
  • Three-dimensional terraced field modeling method based on TIN

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[0046] The technical solution of the present invention is described in detail below.

[0047] The TIN-based 3D terrace modeling method of the present invention includes the following steps:

[0048] A1. On the Civil3D platform, open the original contour topographic map, and the user uses a closed polyline to delineate the boundary of one or more proposed terraced areas;

[0049] A2. Use the surface generation tool of the Civil3D platform to create an empty TIN surface, record it as the original terrain surface, select the contour line in the original contour map, add it to the contour collection of the original terrain surface, and use it Civil3D's regenerating surface tool to obtain the original three-dimensional terrain surface;

[0050] A3. Use the trimming surface tool of the Civil3D platform to clone a terrain clone surface equal in size to the delineated proposed terraced area from the three-dimensional original terrain surface. The terrain clone surface is a part of the origina...

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Abstract

The invention provides a three-dimensional terraced field modeling method based on TIN, belonging to the field of three-dimensional terraced field modeling. At present, all the terraced field modelingmethods are based on DEM (digital elevation model) of a regular grid, which have the problems that it is difficult to control the terraced field shape, and the model precision varies with the DEM precision, so it is difficult to extract earthwork and optimize the terraced field model. In order to solve the above problems, the technical scheme of the invention mainly comprises the following steps:creating an empty TIN surface to obtain a three-dimensional original terrain surface; obtaining the terrain clone surface; obtaining the average slope of the terrace clone surface in each terraced field area, and finding out the height difference H of terraced field step; taking H as a parameter, extracting a new contour with a height difference H from the terrain clone surface; obtaining a reference contour; generating upper and lower step sidelines until all datum contours are processed; creating an empty TIN surface and adding the lines delimiting the terrace area as boundary lines to theterrace surface to obtain a three-dimensional terrace surface.

Description

technical field [0001] The invention relates to a three-dimensional terraced field modeling technology, in particular to a three-dimensional terraced field modeling method technology based on an irregular triangular network (TIN). Background technique [0002] There are many mountains in the west of my country, and the sloping cultivated land is the main cause of soil erosion in this area. An effective method to improve soil and water loss in sloping farmland is to transform the sloping land into terraced fields—"slopes into terraces". Practice has proved that after the slope is changed to a ladder, the ability to intercept slope runoff and soil conservation has been greatly improved. For this reason, many provinces and regions in my country have carried out large-scale slope-to-elevator engineering practice activities. [0003] Three-dimensional modeling of terraces is an important link in the design of slope-to-ladder projects. The current terrace modeling methods are al...

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 周方晓
Owner PANZHIHUA UNIV
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