机载激光点云数据滤波是获取高精度数字表面模型和数字高程模型的关键。
Airborne lidar point cloud filtering is the key of acquiring DSM and DEM with high precision.
数字高程模型(dem)是对地球表面地形地貌的数字表达、模拟，DEM在地质学中得以广泛的应用。
Digital elevation moded (DEM) is a digital expression of landform surface, and its application in geology has become more and more extensive.
数字高程模型(dem)是对地球表面地形地貌的数字表达、模拟，DEM在地质学中得以广泛的应用。
Digital elevation moded (DEM) is a digital expression of landform surface, and its application in geology has become more and more extensive.
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