In the local updating work of the 1∶10000 basic geographic information data updating project in Anhui Province,aiming at the characteristics of heavy workload and high difficulty in the layout of control points in the field,this paper studies the control-free technical method of DEM production by UAV-LiDAR measurement technology,and uses the reliable ground points extracted from the laser point cloud classification results to establish an elevation fitting model to fit the elevation of the converted point cloud and produce DEM.And compared with the accuracy of DEM products produced by traditional point cloud elevation fitting through measured control points.The study show that the accuracy of DEM produced by the control-free technology could meets the requirements of 1∶10000 DEM updating in Anhui Province.
关键词
激光雷达点云/数字高程模型/无人机/可靠地面点
Key words
light detection and ranging(LiDAR)/digital elevation model/unmanned aerial vehicle/reliable ground points
维普
万方数据