Tools in Global Mapper Pro to improve the vertical accuracy of point clouds and DEMs
The Quality Control (QC) tool of Global Mapper Pro is easy to use and improves the vertical accuracy of point clouds and digital elevation models (DEMs) or grids dramatically. In this screen copy from GM Pro, the RMSE (Root mean square error) between the point cloud and 273 surveyed points have been reduced to about 12cm. This can be further improved with more iterations of the QC-tool. The vertical error has been eliminated compared to the blue line in the path profile, which represents the DEM from the point cloud which has been extracted without any GCPs (Ground control points) in the Pixel to Point processing. All of these functionalities are available in Global Mapper Pro and does not require multiple software packages or plug-ins.