nlcd land classification legend cover use usgs landcover urban 2011 national anderson colour database level data categories qgis class type
land cover decade representing completion conterminous database change states united national information 2011
dataset consortium characteristics resolution
land cover 1992 completion retrofit nlcd database 2001 change national 1379 2008
land database production cover national nlcd usgs eros gov six now report
land cover nlcd 2011 change example database update national harvest forest gov molina georgia near usgs