Digital Surface Model ( DSM)ĭigital Surface Model ( DSM) represents the MSL elevations of the reflective surfaces of trees, buildings, and other features elevated above the “Bare Earth”. Now let’s a have a look what is Digital Surface Model (DSM). Terrain analyses in geomorphology and physical geography.Reduction (terrain correction) of gravity measurements (gravimetry, physical geodesy).Rectification of aerial photography or satellite imagery.Creation of physical models (including raised-relief maps).Modeling water flow or mass movement (for example, landslides).Reference 3D products include quality masks that give information on the coastline, lake, snow, clouds, correlation etc.sampling density (elevation data collection method) A bathymetric terrain model of the Atlantic margin covering almost 725,000 square kilometers of seafloor from the New England Seamounts in the north to the Blake Basin in the south is compiled from existing multibeam bathymetric data for marine geological investigations.Several factors play an important role for quality of DEM-derived products: The quality of a DEM/DTM is a measure of how accurate elevation is at each pixel (absolute accuracy) and how accurately is the morphology presented (relative accuracy). It does not store any personal data.For practical purpose this “Bare Earth” DEM is generally synonymous with a Digital Terrain Model (DTM).
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