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<!-- Deleted image removed: Image:DigitalSurfaceModel.jpg|<strong>Digital surface model (DSM)</strong><br />Topographic model of the earth’s surface that includes buildings, vegetation, roads, and natural terrain features. The key benefit of the DSM is that it provides a geometrically correct base map. -->
Image:DigitalTerrainModel.jpg|<strong>Digital terrain model (DTM)</strong><br />"Bare earth" topographic model that has had vegetation, buildings, and other cultural features digitally removed, enabling users to infer terrain characteristics possibly hidden in the DSM.
Image:OrthorectifiedRadarImage.jpg|<strong>Orthorectified radar image (ORI)</strong><br />Grayscale image of the earth’s surface that is has been corrected to remove geometric distortions, accentuating topographic features far more than is possible with aerial photography.
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