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edit approved Feb 7, 2011 at 18:02
Chris
edit approved Feb 7, 2011 at 18:02
Chris
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In my experience a DEM refers to a raster based elevation model used in programs like ESRI's ArgGIS. Each pixel represents an elevationArcGIS. A DTM is a vector based elevation model used by programs like Autodesk CivilCad. It is a grid of 3d cells. I would create a TIN from survey data then build a DTM from the TIN (triangulated irregular network).

In my experience a DEM refers to a raster based elevation model used in programs like ESRI's ArgGIS. Each pixel represents an elevation. A DTM is a vector based elevation model used by programs like Autodesk CivilCad. It is a grid of 3d cells. I would create a TIN from survey data then build a DTM from the TIN (triangulated irregular network).

In my experience a DEM refers to a raster based elevation model used in programs like ESRI's ArcGIS. A DTM is a vector based elevation model used by programs like Autodesk CivilCad.

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user1858
user1858

In my experience a DEM refers to a raster based elevation model used in programs like ESRI's ArgGIS. Each pixel represents an elevation. A DTM is a vector based elevation model used by programs like Autodesk CivilCad. It is a grid of 3d cells. I would create a TIN from survey data then build a DTM from the TIN (triangulated irregular network).