Version history for OFR 2008-1379 U.S. Geological Survey Completion of the National Land Cover Database (NLCD) 1992–2001 Land Cover Change Retrofit Product Version 1.0: Posted On-line February 24, 2009. Version 1.1: Posted On-line March 2, 2009. Figures 6–13 were revised to show the correct scale in feet.