Representation, usually on a flat surface, of a part or whole of the Earth or other parts of the universe. Collections of maps linked digitally or bound together in a book are called atlases.
Overview of the Pacific Northwest Urban Corridor Geologic Mapping Program concerned with geology and urban hazards with links to online geologic maps, current research, publications, and contacts.
A presentation of bird photographs, songs, identification tips, distribution maps, and life history information for North American birds, and a forum for commentary and discussion on birds.
Pennsylvania digital data for watershed boundaries, county geology, and flood mapping in Arc/Info format compressed with gzip utility for downloading plus links to other sources of data.
Description of the priority ecosystems studies initiative with links to projects in Chesapeake Bay, Greater Yellowstone, Mojave Desert, Platte River, Salton Sea, San Francisco, and south Florida.
Home page for the USGS Rocky Mountain Mapping Center in Denver, CO with mapping activities in the western U.S. and links to research activities, products, mapping liaisons, and education.
Click on a state on a map or list to access status of geologic mapping at the scales of 1:24,000 and 1:100,000 under the National Cooperative Geologic Mapping Program (NCGMP) providing federal matching funds for state geologic work.