Quality Control Analysis of UAV Digital Terrain Model with GNSS Geodetic Digital Terrain Model

Spatial data procurement technology using an unmanned aerial vehicle (UAV/Unmanned Aerial Vehicle) system is one of the aerial image capture technologies that produces detailed spatial data. The purpose of DSM correction is used to resolve altitude values from DSM information. In image processing, filtering is a local operation carried out to facilitate visual interpretation and obtain DTM data. The method used is bare earth filtering, then to identify the filtering parameters using the bare earth Digital Surface Model UAV photo method to the UAV Digital Terrain Model and to see the results of the quality control analysis of the UAV Digital Terrain Model against the Geodetic GNSS Digital Terrain model. The spatial data generated from UAV technology in this study has an accuracy of = 0.01243 meters and RMSEz = 1.420 meters. The highest quality filtering results are filtering with a slope parameter of 10° with a radius of 100 meters because from the results of the elevation comparison curve, the diagram that has the closest elevation to GNSS Geodetic is the result of filtering a slope of 10° with a radius 100 meters.