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，研究了基於DGPS 的低溼地區域侷部高精度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.
以三維激光掃描系統爲工具，建立黃土高原丘陵溝壑區綏德縣橋溝小流域高精度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.
過濾是LIDAR數據預処理的重要步驟，過濾的目的是把LIDAR數據分成地麪點和非地麪點，它是獲取高精度數字高程模型的關鍵。