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http://nationalmap.gov/index.html The Last Piece of the Puzzle - USGS Historical Maps: A summary of the USGS Historical Topographic Map Collection , its status and relevance to many diverse audiences has been published as a "Top Story" on the USGS main website . The article outlines the goals of the Historical Collection program and a short history of The National Program for Topographic Mapping, which was established in 1884 . Also, it reviews map changes over time, including scales and symbology.

The National Map

Digital Map - Beta

The "Digital Map - Beta" is the first step toward a new generation of digital topographic maps delivered by the U.S. Geological Survey . These maps are built from The National Map data, which are integrated from local, State, Federal, and other sources. The initial version of the "Digital Map – Beta" includes orthoimagery plus roads and geographic names in the traditional 7.5 minute quadrangle format. http://nationalmap.gov/digital_map/index.html
http://nationalmap.gov/

The National Map

NHD/WBD in the Big Easy: The USGS will be hosting the 4th bi-annual National Hydrography Dataset ( NHD )/ Watershed Boundary Dataset ( WBD ) Stewardship Conference in New Orleans, March 29-30, 2012. The conference is in conjunction with the American Water Resources Association's 2012 Spring Specialty Conference on Geographic Information Systems and Water Resources. The NHD is the surface water component of The National Map to be used in general mapping and in the analysis of surface-water systems by geographic information systems (GIS). Conference agenda: http://bit.ly/zNXixX