Global Land Cover Characterization (GLCC) (Global_Landuse_USGS) is a land cover classification datasets based primarily on the unsupervised classification of 1-km AVHRR (Advanced Very High Resolution Radiometer) 10-day NDVI (Normalized Difference Vegetation Index ) composites.
The AVHRR source imagery dates from April 1992 through March 1993 (https://www.usgs.gov/centers/eros/science/usgs-eros-archive-land-cover-products-global-land-cover-characterization-glcc?qt-science_center_objects=0#qt-science_center_objects).
The GLCC contains 22 numerical classes corresponding to specific land cover types.
Associated files include: “Lookup_Landuse_USGS.txt”, and “SWAT2012.mdb”.
Download Global Landuse USGS