机载激光雷达林区数字高程模型的建立

摘要

选择地处草原和森林过渡地带的上库力农场作为研究区(E120°36′50.48″~120°52′56.53″,N50°21′11.08″~50°24′32″),由机载激光雷达Leica ALS60采集实验数据,对TerraSolid分类获取的地形点建立数字高程模型(DEM);利用IDL编译一次样条有限元内插法对点云数据进行分块处理,分析生产DEM的精度.结果表明:1.0、1.5、2.0 m三种不同分辨率的DEM精度,分别为0.0340、.078、0.096 m.%The grassland and forest transition zone library force the Shang Ku Li farm as study area (E120°50.48′36″-120°52′56.53″, N50°21′11.08″-50 °24′32″) were selected .The point cloud data was acquired by the airborne laser scanning (ALS) technique of Leica ALS60.The ground points were classified by the TerraSolid software , and the digital elevation model ( DEM) was created by a spline finite element interpolation method which was compiled by IDL .The accuracy of DEM were 0.034, 0.078, and 0.096 m when the resolution were 1.0, 1.5 and 2.0 m, respectively.