Type: 
    Extension:
      Version: 
  Compression:
  Color Depth:
   Maintainer: U.S. Geological Survey (USGS)
Specification:

The format of DEM map files is described in the publication:

  Data Users Guide 5 - Digital Elevation Models

and is available for $1.00 US from:

  Earth Science Information Center (ESIC)
  U. S. Geological Survey
  507 National Center
  Reston, VA  22092 USA
  Voice: 1.800.USA.MAPS
  Voice: 703.860.645

  The Andrew Consortium
  http://www.cs.cmu.edu/afs/cs.cmu.edu/project/atk-ftp/web/andrew-home.html

  http://edcwww.cr.usgs.gov/glis/hyper/guide/1_dgr_dem

Some parts © 2009 Advameg, Inc.