一种基于点云数据的DEM生成方法

A DEM Generation Method Based on Point Cloud Data

利用机载激光雷达点云滤波已成为获取高精度数字高程模型的重要手段之一。本文充分考虑规则格网和虚拟格网的优势,利用规则格网进行建筑物区域与非建筑物区域的初步分离;然后,利用虚拟格网进行非地面点的去除,最后,用获得的地面点生成DEM,取得了较好的实验效果,具有一定的实用价值。

Airborne LIDAR point cloud filtering has become one of the important means to obtain high precision Digital Elevation Mod- el. Fully considering the advantages of regular grid and virtual grid advantage, this paper makes the preliminary separation of the building area and non - building area by using the regular grid, and then uses the virtual grid for the removal of non - ground points, and finally generates DEM according to the ground points. The good experimental result shows that it has certain practical value.