http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
produced by the United States Geological Survey.
Relief shown by contours and spot heights.
"Produced from original manuscript drawings."
Compiled from aerial photographs taken 1976, field checked 1979, edited and printed 1984.
Includes quadrangle location map and index to adjoining quadrangles.