Basic HTML version of Foils prepared November 29 98

Foil 12 Digital Elevation Models

From 3D Geographical Information Systems in Tango CEWES Tango Training -- November 17-18 98. by Remek Trzaska, Pawel Roman, Chris Walczak, Marek Podgorny
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.
  • The USGS offers DEM in Public Domain having a spatial resolution of 90 m whereas commercial organizations have the DEM's at 30 m.

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