Laser point cloud-based line tower footing terrain automatic extraction and mapping method

Abstract

The invention discloses a laser point cloud-based line tower footing terrain automatic extraction and mapping method. The method comprises the following steps: denoising and filtering ground point cloud data acquired by a laser radar, repairing the ground point cloud data, processing tower coordinates, setting a tower footing terrain range, processing full-line tower footing data in batches, and generating a contour map; through distance operation, extracting point clouds belonging to each tower position range intelligently, quickly and automatically in batches, and automatically storing as tower footing topographic data according to tower position names, so that designers can carry out design work such as tower footing leg matching and the like; using grid interpolation to generate contour line graphic files, and providing complete tower footing terrain files and graphic files for the design major; according to the invention, the tower footing terrain extraction speed is high, projectcost investment is reduced, manual labor is reduced, and remarkable economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of measuring overhead transmission lines in electric power engineering, and in particular relates to a method for automatically extracting and mapping the terrain of line tower bases based on laser point clouds. Background technique [0002] In the survey and design of transmission lines, power towers are often located in complex terrain such as mountain tops, mountainsides, hills, wastelands, etc. It is necessary to survey and draw tower base topographic maps, especially for mountainous lines, where the role of tower base topographic maps is even more important. For tower positions in mountainous and hilly areas, surveying professionals are required to actually measure the topographic map of the tower base at the tower position, so that designers can determine the configuration of high and low legs and check the jumper wires of corner towers on site. There must be enough terrain points near the tower legs, ...

AI Technical Summary

Problems solved by technology

After exporting the surveying data to the computer in the office, the "CASS Digital Topographic Cadastral Mapping System" is used to generate the topographic map of the tower base. The traditional GPS or total station collects the topographic data of the tower base of the line, and surveyors need to go to the tower site for on-site surveying and mapping. At present, aerial survey data and laser point cloud data are mainly used in line selection measurement and line plane section measurement. Tower base terrain data still uses manual GPS to collect tower base terrain data during positioning, which still consumes a lot of manpower, material resources, and time resources.

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