20220418 21200200 1.0 TRUE 2001 National Land Cover Data (V2) National Land Cover Database 2001 (NLCD2001) is a 16-class (additional four classes in Alaska only) land cover classification scheme that has been applied consistently across all 50 United States and Puerto Rico at a spatial resolution of 30 meters. NLCD2001 is based primarily on the unsupervised classification of Landsat Enhanced Thematic Mapper+ (ETM+) circa 2001 satellite data. It was created by the Multi-Resolution Land Characteristics Consortium. For more information visit <a href="http://www.mrlc.gov/"> their website</a>.