Digital Surface Model (DSM) captures the vegetation and built features together with the land. In comparison, Digital Elevation Model (DEM) captures only the bare-earth raster grid. For example, man-made constructions including powerlines, bridges, and buildings and vegetations aren’t included in a DEM, but they are included in DSM.
As we all know, aerial photogrammetry technology is playing an increasingly important role in urban planning and construction. Moreover, compared with the traditional topographic survey technology, aerial photogrammetry technology has the advantages of small volume, light weight, ra...
After the LiDAR data is obtained, the data can be post-processed only after data preprocessing. After the data preprocessing, there is a data checking software to conduct a preliminary check on the data results. The general data format check has the follo
Lidar (light detection and ranging) is an optical remote-sensing technique that uses laser light to densely sample the surface of the earth, producing highly accurate x,y,z measurements. Lidar, primarily used in airborne laser mapping applications, is eme