基于不同滤波方法的机载激光雷达数据处理及表面模型构建

Airborne LiDAR Data Processing and Surface Model Construction Based on Different Filtering Algorithms

利用几种不同的滤波算法对黑龙江省凉水国家级自然保护区的点云数据进行处理,对比分析评价了各滤波算法在东北地区的滤波分类效果及对构建数字高程模型和数字表面模型的影响。指出了各算法的适用范围,并生成了高质量的数字表面模型产品———精确反映地形起伏的DEM和准确反映地物高程及形状信息的DSM。

Several different filtering algorithms were used to process LiDAR point cloud data of different areas in Liangshui Nature Reserve,Heilongjiang.The filtering and classification results of each filtering algorithm in Northeast China were eva-luated by contrast analysis.Moreover,high-quality Digital Elevation Models（DEM） and Digital Surface Models（DSM） were built to analyze the diverse effects of different filtering algorithms.The proper scope of each algorithm was discussed.Results showed that the established DEM could sensitively reflect topographical details,and the DSM could accurately reflect elevation of natural features and shape information.