Crop Dominance (NASA EOSDIS, 2016)

This Global Food Security-support Analysis Data (GFSAD) at nominal 1 km result from a collaborative effort by the National Aeronautics and Space Administration (NASA) and the United States Geological Survey (USGS), to provide global cropland data that contributes towards global food security in the twenty-first century. The Global Crop Extent (GCE) 1 km Crop Dominance (Thenkabail et al., 2012, Thenkabail et al., 2011, Thenkabail et al., 2009a, 2009b) provides cropland extent, irrigated vs. rainfed, and crop dominance. Note that the GCE 1 km Crop Dominance provides spatial distribution of the five major global cropland types (wheat, rice, corn, barley and soybeans; which occupy 60% of all global cropland areas) at nominal 1 km (GCE 1 km Crop Dominance). The map is produced by overlying the five dominant crops of the world produced by Ramankutty et al. (2008), Monfreda et al. (2008), and Portman et al. (2009) over the remote sensing derived global irrigated and rainfed cropland area map of the International Water Management Institute (IWMI; Thenkabail et al., 2009a, 2009b, 2011, Biradar et al., 2009). Input data used in these various products include remote sensing (e.g., AVHRR, SPOT vegetation, MODIS), crop type distribution, secondary (e.g., elevation), climate (e.g., 50-year precipitation, 20-year temperature), reference (e.g., sub-meter to 5-m imagery, ground data), and statistics (e.g., country statistics) data were used. Detailed methodology and other descriptions are presented in numerous publications (Thenkabail et al., 2012, Thenkabail, 2012, Thenkabail et al., 2011, Thenkabail et al., 2009a, 2009d, Biradar et al., 2009, Thenkabail and Lyon, 2009, Turral et al., 2009, Dheeravath et al., 2010, Velpuri et al., 2010, Thenakabail et al., 2009c, Thenkabail et al., 2009b, 2009c, Thenkabail et al., 2007a, 2007b, Thenkabail et al., 2006, Biggs et al., 2006, Gangalakunta et al., 2009, Li et al., 2009).