![]() ![]() In this regard, the DEM is influenced by the following: ![]() Since the DEM is a major data necessity for many earth based modeling situations, it is imperative that the users know the requirements of the intended application, and the limitation of any created/available DEMs. Before using, the DEM should be independently assessed for its quality in terms of qualitative and quantitative characteristics in order to determine its fitness for a particular use. Topographic data may be used to create a DEM, or a DEM may have been obtained from a contractor or other third party.
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