机载LiDAR点云生成多尺度DEM方法

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。

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

A generalization-generation-based method is proposed to produce high-fidelity and multiscale digital elevation model(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.