Tue Mar 14 07:15:44 1989
elevation
PERMANENT
grass
cell
7.5 minute Digital Elevation Model (DEM) produced by the USGS

Elevation above mean sea level in meters for spearfish database
DEM was distributed on 1/2 inch tape and was extracted using
GRASS DEM tape reading utilities.  Data was originally in feet
and was converted to meters using the GRASS map calculator
(Gmapcalc).  Data was originally supplied for both the
Spearfish and Deadwood North USGS 1:24000 scale map series
quadrangles and was patched together using GRASS
