Basic HTML version of Foils prepared 9 April 98

Foil 7 Digital Elevation Models

From 3D Collaborative GIS in CIV Project Rome Laboratory CIV Final Review -- 9 April 98. by Marek Podgorny
1 A DEM consists of a sampled array of elevations for a number of ground positions that are normally at regularly spaced intervals. These intervals determine the spatial resolution of the DEM.
2 The USGS offers DEM in Public Domain having a spatial resolution of 90 m whereas commercial organizations have the DEM's at 30 m.
in Table To:

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