For each administrative area, the area of rice production was
distributed across the raster cells that were deemed most likely to support
that rice production system. Cells that were assumed to have rice
were those that had agriculture according to a satellite image-derived
raster database of global land cover (GLOBCOVER version 2.3; Arino
et al., 2008), for flooded systems in South and Southeast Asia
complemented by satellite derived data on the extent of paddy rice cultivation
by Xiao et al. (2006)