LiDAR Data Processing - Outliers

Jul 06, 2023

Some data in the lidar data are obviously unreasonable and need to be eliminated. These points are called outliers. The elevation system is generally processed at the same time as the plane coordinate system, and the geodetic height is converted into a normal height. The most important step in office data processing is the filtering of lidar data. Accurately classify the surface points of LiDAR point cloud data (including natural and artificial surface points such as vegetation, water systems, structures, etc.), and classify all surface points in the classified point cloud as well as natural and artificial vegetation, buildings, structures, etc. on the surface The points on the surface of the ground objects are all used as feature points, and the surface water area line with elevation information is used as a feature line to participate in the construction and output of digital surface model (DSM) products; ground points, bridge points, water points in the point cloud As feature points, surface water area line and river edge with elevation information are used as feature lines to participate in the construction and output of digital elevation model (DEM) products.