We conducted two sets of comparisons between MODrice
and NLCD20 maps. The first comparison is to mimic a
pixel-based comparison by assuming all MODIS-based
paddy rice pixels and NLCD20 paddy rice pixels have
100% fractional cover of paddy rice within individual
pixels. In the pixel-based comparison, the correlations in the
area estimates between MODrice and NLCD20 at the
provincial level were high, with r2=0.88 for flat provinces
and r2=0.80 for hilly provinces (Fig. 6). While caution
should be used when deriving correlation coefficients from
samples with a small population (e.g., number of provinces),