http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology and resource assessment of Costa Rica at 1:500,000 scale
a digital representation of maps of the U.S. Geological Survey's 1987 folio I-1865
Digital versions of geology and resource assessment maps originally published in 1987. 7 layers are available: geology and faults; gold mining area geology; favorable domains for selected deposit types; Bouguer gravity contours and lineaments; isostatic gravity contours; mineral deposits, prospects, and occurrences; and rock geochemistry sample points. Accompanied by MAPPER display software.
U.S. Department of the Interior, U.S. Geological Survey ; by Paul G. Schruben ; display software by Russell A. Ambroziak.
Also available via Internet from the USGS web site. Address as of 9/21/02: http://pubs.usgs.gov/dds/dds19; current access is available via PURL.
System requirements for DOS/Windows: PC with 386 (or better); math coprocessor; 640K RAM; DOS 5.0 or later; Microsoft MSCDEX 2.1 or later; CD-ROM drive with ISO 9660 software driver; hard disk with 5MB free space; SVGA graphics (640x480 with 256 colors); VGA color monitor.
System requirements for Macintosh PC: 8MB RAM; System 7.x; 256-color graphics display.
U.S. Geological Survey digital data series ; DDS-19