Revision History for FS 2011-3009 G.J. Allord and W.J. Carswell, Jr. Scanning and Georeferencing Historical USGS Quadrangles ----------------------------------------------------- Posted online January 19, 2011 ----------------------------------------------------- Revised and reposted September 1, 2011 Minor word Changes were made to Fact Sheet 2011-3009. The USGS Historical Quadrangle Scanning Project (HQSP) is scanning all scales and all editions of approximately 200,000 topographic maps published by the U.S. Geological Survey (USGS) since the inception of the topographic mapping program in 1884. This scanning will provide a comprehensive digital repository of USGS topographic maps, available to the public at no cost. This project serves the dual purpose of creating a master catalog and digital archive copies of the irreplaceable collection of topographic maps in the USGS Reston Map Library as well as making the maps available for viewing and downloading from the USGS Store and The National Map Viewer. ----------------------------------------------------- Revised and reposted January 31, 2011 Modified data in Fact Sheet 2011-3009. ----------------------------------------------------- Revised and reposted May 18, 2015, version 2.0 Page 2: Authorship has changed from G.J. Allord and W.J. Carswell, Jr., to L.R. Davis and G.J. Allord Page 2: Added section in text: Future Plans • As they are identified, scan and release historical USGS quadrangles that are not currently electronically available. • A GeoTIFF product has been designed and the release of historical quads as GeoTIFF files will begin in early 2015.