The USDA, NASS Cropland Data Layer (CDL) is a raster, geo-referenced, crop-specific land cover data layer. The 2010 CDL has
a ground resolution of 30 meters. The CDL is produced using satellite imagery from the Landsat 5 TM sensor, Landsat 7 ETM+
sensor, and the Indian Remote Sensing RESOURCESAT-1 (IRS-P6) Advanced Wide Field Sensor (AWiFS) collected during the current
growing season. <div> <br /> <div> Some CDL states used additional satellite imagery and ancillary inputs to supplement and
improve the classification. These additional sources can include the United States Geological Survey (USGS) National Elevation
Dataset (NED), the USGS National Land Cover Dataset 2001 (NLCD 2001), and the National Aeronautics and Space Administration
(NASA) Moderate Resolution Imaging Spectroradiometer (MODIS) 250 meter 16 day Normalized Difference Vegetation Index (NDVI)
composites. </div> <div> Agricultural training and validation data are derived from the Farm Service Agency (FSA) Common Land
Unit (CLU) Program. The NLCD 2001 is used as non-agricultural training and validation data. </div> <div> <br /> </div> <div>
The strength and emphasis of the CDL is agricultural land cover. Please note that no farmer reported data are derivable from
the Cropland Data Layer. </div> </div>