A Flow to Generate DEM from Lidar Data

To consume less time and less memory, this paper presents a flow to generate DEM from Lidar data. Firstly the flow labels non-ground points based on multi-echo information. Secondly by the relativity among neighbor points, the flow labels many other non-ground points. After these two up-to-down steps, many non-ground points have been eliminated, which has reduced the amount of the Lidar points successful. At last, the flow use filtering arithmetic based on scan lines to get DEM. This paper comes to a conclusion that both the flow and algorithm are feasible by using them to disposing laboratory data.