Table 4.

Estimated global and per-biome confusion matrices, reported both in terms of area and in terms of proportions (in parentheses), using the same row, column conventions as in Tables 2 and 4 Globally a total of 558 voxels considered. The proportions ${\widehat{p}}_{ij}$ are estimated taking into account the strata sample and population sizes as [3]; the areas ${\widehat{A}}_{ij}$ are derived by multiplying each ${\widehat{p}}_{ij}$ by the total area A of all the voxels of each biome.

Biome	${\widehat{A}}_{11}\left[{\text{km}}^2\right]\text{(}{\widehat{p}}_{11}[0-1])$	${\widehat{A}}_{12}\left[{\text{km}}^2\right]\left({\widehat{p}}_{12}[0-1]\right)$	${\widehat{A}}_{21}\left[{\text{km}}^2\right]\left({\widehat{p}}_{21}[0-1]\right)$	${\widehat{A}}_{22}\left[{\text{km}}^2\right]\left({\widehat{p}}_{22}[0-1]\right)$
Tropical Forest	249910 (0.0005)	435447 (0.0009)	2397674 (0.0052)	4.56 108 (0.9933)
Temperate Forest	17550 (0.0001)	22055 (0.0001)	301734 (0.0009)	3.32 108 (0.9990)
Boreal Forest	100772 (0.0003)	31695 (0.0001)	37259 (0.0001)	3.85 108 (0.9996)
Tropical Savanna	1547709 (0.0037)	840401 (0.0020)	2386575 (0.0057)	4.16 108 (0.9886)
Temperate Savanna	135805 (0.0005)	52443 (0.0002)	234781 (0.0008)	2.88 108 (0.9985)
Mediterranean	7211 (0.0001)	10287 (0.0002)	116962 (0.0019)	0.64 108 (0.9979)
Deserts/Xeric Shrublands	34966 (0.0001)	15529 (< 0.0001)	64632 (0.0001)	5.52 108 (0.9998)
Global	2093922 (0.0008)	1407857 (0.0006)	5539617 (0.0022)	2.49 109 (0.9964)