Research On The Application Of Domestic Airborne Lidar In The Selection Of Power Transmission Lines In Mountainous Areas

As an active measurement method,airborne lidar can quickly acquire the terrain data of the survey area.This technology is widely used in power line and highway survey and design,coastline extraction,agriculture and forestry and other fields,because it can quickly obtain high-precision three-dimensional coordinate data and obtain high-quality image data.In this paper,taking LC-3500 as an example,the problems in data acquisition,data processing and application of domestic airborne lidar are studied.The main research contents are as follows:This paper summarizes the research status of airborne lidar technology at home and abroad,and summarizes the advantages and disadvantages of domestic system data acquisition and application.Starting from the basic principle of airborne lidar,the system positioning principle,positioning model and the transformation relationship among coordinate systems are analyzed.The operation conditions of airborne LiDAR system in mountainous area and the influencing factors in data acquisition process are analyzed.TerraScan and TerraModel modules in terrasolid software are used to filter and classify the collected point cloud data,and interpolate the filtered point cloud data to generate DEM.The path map of holographic image is made by using the information of Orthophoto image,digital elevation model and power line and communication line drawn by surveying area.Line path plane section map,combined with image path map,fully consider the mountain topography and landform image,avoid large occlusion,large height difference,steep tower topography,large slope,and adjacent spacing disparity areas,through the pre-arranged tower location for multi-scheme optimization and selection.