The SRTM data (Level 2.1, the most advanced processing state) can be downloaded at USGS. The resolution is for SRTM-3 three-arc-seconds, which is about 90 meters. The data is available in 1*1 deegree (SRTM-1) for the USA and 3*3 degree (SRTM-3) tiles for the rest of the world. The earth surface height was recorded between 60°N and 56°S. The Shuttle Radar Topography (SRTM) mission explored the structure of the earth surface in February 2000. For detailed information see the Tutorial Section. This step is also necessary for the following processing of a Digital Terrain Model (DTM) on the basis of OpenStreetMap vector data. If you want know what a DEM, DSM or DEM is, please visit the Definitions Section.įirst the processing of an enhanced SRTM Digital Surface Model (DSM) is explained. SRTM Digital Terrain Model (DTM) Processing SRTM Digital Surface Model (DSM) ProcessingĢ.
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