Table 3. Error matrix obtained from the accuracy assessment of the 2010 land cover map of the Santarém site (MF – mature forest, NF – non-forest, SF – secondary forest).

	Classified
Reference	MF	NF	SF	Total	Omission error
MF	196	0	4	200	0.020
NF	0	198	2	200	0.010
SF	23	11	166	200	0.170
Total	219	209	172	600
Commission error	0.105	0.053	0.035

The overall accuracy was 0.93.