high-precision dem

基本解释

Thirdly, a method based on DGPS for obtaining local high precision DEM in low-lying wetlands is presented.
第三，研究了基于DGPS 的低湿地区域局部高精度DEM的建立方法。
Based on 3D laser scanner system, the paper takes the Qiaogou small basin locating in hilly and gully region, Suide County as test region, sets up its high-precision DEM.
以三维激光扫描系统为工具，建立黄土高原丘陵沟壑区绥德县桥沟小流域高精度DEM。
The aim of the filtering of LIDAR data set is to divide the data set into ground points and non-ground points. The filtering of LIDAR data set is a crucial step to obtain the DEM with high precision.
过滤是LIDAR数据预处理的重要步骤，过滤的目的是把LIDAR数据分成地面点和非地面点，它是获取高精度数字高程模型的关键。