Frequently Asked Question
DSM (Digital surface Model)
DSM is a digital model representation of a terrain's surface. DSM represents the elevations above sea level of the ground and all features on it. A DSM is a gridded array of elevations. it is a layer symbolized by a gray color ramp, special effects such as hill-shading may be used to simulate relief. DSMs can be used to study surface properties and water flow.
A digital surface model (DSM) is usually constructed using automatic extraction algorithms (i.e. image correlation in stereo photogrammetry). DSM resembles laying a blanket on your imagery. It represents top faces of all objects on the terrain, including vegetation and man-made features, and highlights the different elevations of the features
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