Purpose:
Established in 1879, the U.S. Geological Survey (USGS) has Federal responsibility for preparing multipurpose maps and fundamental cartographic data to meet the requirements of users throughout the United States. In addition to U.S. maps, the Survey also provides a wide assortment of world and planetary maps.
Supplemental_Information: More information on USGS mapping products can be found at
http://erg.usgs.gov/isb/pubs/factsheets/worldmaps.html