They measure the height values of the first surface on the ground as seen from above, including terrain features, buildings, vegetation and power lines.ĭigital Terrain Models (DTMs) provide a topographic model of the bare earth / underlying terrain of the earth's surface and are usually derived from DSMs by digitally removing the man-made and vegetation features. ![]() Our height data and LiDAR products for site landscape and topography add up to the most comprehensive online range in terms of detail and coverage.Įasy to work with, the data can be brought into CAD and GIS software to enable 3D analysis and provide important contextual information for a range of applications.ĭigital Surface Models (DSMs) provide a topographic model of the earth's surface.
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