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• Reference: Maps  (248)
• Science: Earth Sciences: Geomatics  (651)
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GeoGraphics Provides custom maps, drawings, and technical illustrations. Provides links to publications and images. http://www.btinternet.com/~simon_tapper/index.html

Geologic Data Systems Works with petroleum companies to make precise geological maps. http://www.geologicdata.com

Geology of Greenland Map Series Geological survey of Denmark and Greenland. All maps are compiled on CD. http://www.geus.dk/departments/geol-mapping/map-cd-rom/gr-map-cd-rom-uk.htm

USGS NAWQA Digital Maps National Water-Quality Assessment provides digital maps for a variety of themes. http://water.usgs.gov/nawqa/digmap.html