Crossing ridge line design method based on digital height model DEM

Abstract

The present invention discloses a ridge crossing line design method based on digital elevation model DEM, comprising the following steps of building a digital terrain model in a line selection area on the basis of a DEM, appointing the starting point and the end point of a ridge crossing line, analyzing the land feature in an alignment zone, determining a pass control point and designing an up line and a down line piecewise, drawing a preliminary slope according to average gradient, distinguishing the average gradient, collocating transitional gradient, merging and adjusting intersection points, merging and adjusting gradient change points and evaluating the proposal. The method of the present invention can effectively and fully utilize the functions of computers, has computers automatically finish the paper location calculation work which cannot be finished manually, improve work efficiency dozens of times than manual line selection, can guarantee line selection quality, and can acquire a ridge crossing route proposal with the minimum earthwork volume and the lowest construction cost under given conditions.

Description

technical field [0001] The invention relates to a computer automatic line selection method based on a digital elevation model (DEM, Digital Elevation Model). This method is mainly used for substituting manual line selection operations for sections of highways and railways when landform (topography) and slope are mainly considered. Background technique [0002] Digital Elevation Model (DEM, Digital Elevation Model) is a collection of ground elevation point data reflecting topography, elevation and interpolation software, mainly used to draw topographic maps and obtain the elevation of any point on the ground. After its appearance, its scope of application has been continuously expanded. At present, it is mainly used for interactive applications in civil engineering survey and design, including landform analysis, landscape analysis and simulation, site design, foundation leveling and cost analysis. The main disadvantages of the existing application technology are: the compute...

AI Technical Summary

Problems solved by technology

The main disadvantages of the existing application technology are: the computer is only used as the visual interface of the electronic topographic map, and the drafting of the design scheme must be completed with the help of manual intervention, and the interactive application designers have a large workload and do not give full play to the advantages of DEM. effect

[0005] 1. The number of schemes is limited, and the manual paper line selection method generally only compares two schemes, making it difficult to find the best scheme

[0006] 2. Manual paper line selection and computer interactive line selection, the work efficiency is relatively low, and the functions and functions of the computer are not fully utilized.

[0007] 3. Existing methods are highly empirical and subjective, lack consistent standards, and take into account limited factors, which also cause difficulty in program evaluation

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