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TIMESTAMPS
USGS Topographic Maps
 General information about topographic mapping General information about USGS maps Finding and ordering USGS topographic maps Digital Raster Graphics computer images of topographic maps Topographic map revision Topographic map symbols Mapping standards -National Geospatial Program Standards -Primary series quadrangle map standards The UnitedStates Geological Survey: 1879-1989 |  USGS Topographic Mapping 1879-1992 The USGS took over responsibility for mapping the country in 1879 and has been the primary civilian mapping agency of the United States ever since. The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles. More than 55,000 7.5-minute maps were made to cover the 48 conterminous States. This is the only uniform map series that covers the entire area of the United States in considerable detail. The 7.5-minute map series was officially completed in 1992, and the program has recently been replaced byThe National Map All topographic maps from the 7.5-minute program, as well as various derived products, remain available for sale. The National Map is a framework for geographic knowledge needed by the Nation. It provides public access to consistent, high quality, geospatial data and information from multiple partners to help inform decision making by resource managers and the public.The National Map enhances America"s ability to access, integrate, and apply geospatial data at global, national, and local scales. |
AccessibilityFOIAPrivacyPolicies and Notices
U.S. Department of the Interior |U.S. Geological Survey
URL:http://topomaps.usgs.gov/index.html
Page Contact Information:Contact USGS
Page Last Modified: Friday, 02-Jan-2009 14:58:26 EST
