http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Socorro : 1:100,000-scale topographic map : 30 x 60 minute series (topographic)
edited and published by the Bureau of Land Management National Operations Center in cooperation with the Bureau ... New Mexico State Office.
Relief shown by contours and spot heights.
Includes township diagram, quadrangle location map, and indexes to 1:24,000-scale maps to adjoining maps.
Scale 1:100,000. 1 cm. on the map represents 1 km. on the ground ;