Key Technology Analysis for High-precision DEM Production Based on Airborne LiDAR
Unmanned aerial vehicles equipped with LiDAR technology can rapidly acquire extensive LiDAR point cloud data,offering multiple advantages such as strong penetration,high automation,and high precision.In response to the challenges of traditional methods like total station surveys for creating high-precision Digital Elevation Model(DEM),which suffer from low efficiency and automation,an analysis of key technologies,including trajectory estimation,point cloud fusion and filtering,DEM generation principles,and evaluation,has been conducted based on the principles of air-borne LiDAR technology.In conjunction with the 1:1000 large-scale mapping project of Hei Gangkou Scenic Area in Longting District,Kaifeng City,the feasibility of the workflow was validate.This highly digitized workflow offers fast point cloud processing and analysis,providing a more efficient and accurate source of three-dimensional geospatial data for constructing the foundational geographic information framework in the surveyed area.
Unmanned aerial vehicleLiDAR point cloudPoint cloud processingDigital elevation model
NETL
NSTL
万方数据
