» 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.gdata.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