机载LiDAR点云生成多尺度DEM方法  

Multi-scale DEM generation method based on airborne LiDAR point cloud

作　　者：吴惠丰[1] 唐健林[2] 龙盈[2] 

机构地区：[1]广东省国土资源测绘院,广州510500 [2]湖南省地质测绘院,湖南衡阳421001

出　　处：《测绘科学》2017年第5期131-135,共5页Science of Surveying and Mapping

基　　金：广东省国土资源测绘院基础测绘项目(E1511)

摘　　要：为了利用机载激光雷达点云生成高保真、多尺度的数字高程模型(DEM),提出了一种基于综合生成策略的方法:首先,利用点云数据中的地面点生成高分辨率、高保真的DEM作为基础DEM;然后,通过迭代的方式对上一层较高分辨的DEM进行综合获取较低分辨率、高保真的DEM。实验表明,本文方法不仅具有可行性,而且生成的多尺度DEM具有高保真的特性。A generalization-generation-based method is proposed to produce high-fidelity and multiscale digital elevation rnodel（DEM） from airborne LiDAR point cloud. First, the ground points in the airborne LiDAR data are utilized to produce a high spatial resolution and high fidelity DEM, and this DEM is taken as the basic DEM. Second, an iterative process is employed to produce multi-scale DEM. Specifically, in each iteration, the higher spatial resolution DEM is generalized to produce a lower spatial resolution DEM. The experiment suggests that the proposed method is feasible, and the multi-scale DEMs have the characteristic of high fidelity.

关 键 词：机载LIDAR 点云 数字高程模型 多尺度 综合 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P283.1[天文地球—测绘科学与技术]