Users of our Cropland Data Layer (CDL) and associated raster and vector data files are solely responsible for interpretations made from these products.  The CDL is provided "as is".  USDA/NASS does not warrant results you may obtain by using the Cropland Data Layer.  Feel free to contact our staff at (HQ_RDD_GIB@nass.usda.gov) if technical questions arise in the use of our Cropland Data Layer.  NASS does provide considerable metadata on the CDL in the Frequently Anticipated Questions (FAQ's) section on this CDL website, and on the ordered DVD's.  Also, there are substantial statistical performance measures by State on the AWiFS data categorization accuracies for each DVD for each year.