This work briefly introduces the characteristics of airborne LiDAR technology and point cloud filtering and classification methods.Combined with airborne LiDAR and geophysical surveying projects in Sichuan and Chongqing region,it mainly focuses on the accuracy verification and adaptability analysis of several typical point cloud filtering algorithms and their constructed DEM.The result indicates that in general,the airborne LiDAR DEM data could meet the accuracy requirements of petroleum geophysical exploration;In flat terrain and sparse vegetation areas,the elevation accuracy is high and the quality is reliable;In mountainous areas with complex terrain and dense vegetation,the elevation accuracy is relatively poor and difficult to meet higher requirements.Meanwhile,this paper also discusses how to improve the quality of data acquisition and the accuracy of DEM in difficult areas.
关键词
机载激光雷达/点云滤波/数字高程模型/物理点
Key words
airborne LiDAR/point cloud filtering/DEM/geophysical point
维普
万方数据