As a new type of earth observation technology after aerial photography

UAV airborne LiDAR technology has been quickly applied to topographic mapping

urban modeling and power survey due to its characteristics of high precision

high point cloud density and high resolution.In order to solve the engineering survey problems encountered in the transmission lines in ultra-high voltage

such as line selection

path section measurement

tower base geomorphology map and tower base section map measurement.this paper combines the Hami-Chongqing±800?kV UHV DC transmission line project (package 2) to introduce the application of UAV airborne radar technology in mountainous transmission lines from the aspects of line optimization and selection

path section drawing

tower base shape map and tower base section drawing

and verifies the accuracy through field measurement data.The practice shows that the UAV airborne radar technology solves the current survey problems encountered in the transmission lines in ultra-high voltage

meets the requirements of survey design

and improves the survey quality and the efficiency of field operations.