Experimental Verification Method for the Accuracy of Overhead Transmission Line Section Map Extraction Based on Airborne LiDAR Point Cloud Density
Airborne LiDAR technology is one of the crucial methods for modern geospatial data collection.Due to its high accuracy and efficiency,it has been widely applied in the surveying and design of overhead transmission line engineering.This paper,based on the experimental verification requirements of the IEEE Standard for Unmanned Aircraft Systems(UAS)using Light Detection and Ranging(LiDAR)for above 110 kV Overhead Transmission Line Survey and Design,specifically analyzes the impact of different ground point cloud densities and different section map extraction methods on the accuracy of section map extraction in overhead transmission line engineering using data from actual projects.The experimental verification shows that point cloud density positively correlates with the accuracy of section map extraction.There is a certain extent of accuracy loss during the generation of DEM from ground points,and as the point cloud density decreases,the error increases significantly,particularly in areas with complex terrain.Based on this study,the direct point cloud method is recommended for section map extraction in actual project production to preserve the highest original accuracy of the LiDAR point cloud data.
UASLiDARpoint cloud densityoverhead transmission line engineeringplane-section extracting
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