Tree height section automatic generation method of overhead power transmission line

Abstract

The invention relates to the tree height section technology in an overhead power transmission line design process and particularly relates to a tree height section automatic generation method of an overhead power transmission line. Based on a DSM, heights of tree tops of two sides of the line are automatically judged and a higher point is collected, and an error brought by manual subjective judgment is avoided. With a DSM resolution as a distance between points, cross-sectional points are extracted and are simplified by using the Douglas-Peucker algorithm, the degree of refinement of a sectionis more accurate and reasonable, and an uncertainty caused by manual acquisition is avoided. Starting and ending positions of a tree height section are automatically judged according to a forest arearange surface and tree species, human intervention is not needed, different colors are set for different layers of the section automatically according to the tree species in a flat cross-section diagram, and manual editing is avoided.

Description

technical field [0001] The invention relates to a technology involving tree height sections in the design process of overhead transmission lines, in particular to a method for automatically generating tree height sections of overhead transmission lines. Background technique [0002] Design issues such as laying and elevation of overhead transmission lines often involve problems in the forest area along the way. In order to meet the design requirements, it is necessary to draw the boundary line of the forest area, obtain tree height section points, and draw section lines to generate a section diagram. The processing method of prior art is as follows: [0003] 1. Manually draw the boundary line of the forest area according to the aerial survey images in the aerial survey stereo model, and mark the tree species and average density information of the forest area on the plane according to the forest survey records. [0004] 2. In the aerial survey three-dimensional model, manual...

AI Technical Summary

Problems solved by technology

Its shortcoming is that this method needs to manually judge the height of tree tops within the range of the line sideline and collect higher tree vertices. The highest point judgment and measurement accuracy depend on the stereo measurement experience of the operators in the industry, and the collection distance of section points also depends on manual experience. It is difficult to accurately select the degree of refinement of section points; manually judge the starting point and end point of the section according to the vegetation range, and the degree of automation is low; according to the forest survey data, manually classify the section according to the tree species in the corresponding forest area on the planar section map, which is cumbersome and error-prone

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