Table 3. Confusion matrix for Landsat 7 ETM+.

	EC	PH	SP	AA	SC	TT	AJ	MH	EP	SC	MC	PA	Total	Error of comission
E. curvula (EC)	3	0	0	0	0	1	0	0	0	0	0	0	4	75%
P. Hyparrhenia (PH)	0	3	0	0	0	0	0	0	0	0	0	1	4	75%
S. Plumosum	0	0	0	0	0	0	0	0	0	0	0	0	0	0%
A. Asteraceae	1	0	0	0	0	0	0	0	0	0	0	0	1	0%
S. Centrifugus	0	0	0	0	2	0	0	0	0	0	0	0	2	100%
T. Triandra	0	0	0	0	0	2	0	0	0	0	0	0	2	100%
A. Junciformis	0	0	0	0	0	0	0	0	0	0	0	0	0	0%
M. Hermania	0	0	0	0	0	0	0	2	0	0	0	0	2	100%
E. Plane Nees	0	0	0	0	0	0	0	0	1	0	0	0	1	100%
S. Conrathii	0	0	0	0	0	0	0	0	0	3	0	0	3	100%
M. Capensis	0	0	0	0	0	1	0	0	0	0	2	0	3	67%
P. Australis	0	0	0	0	0	0	0	0	0	0	0	3	3	100%
Total	4	3	0	0	2	4	0	2	1	3	2	4	25
Error of omission	75%	100%	0%	0%	100%	50%	0%	100%	100%	100%	100%	75%

Overall accuracy = (3+3+0+0+2+2+0+2+1+3+2+3) / 21 = 0.84.

0.84 x100 = 84%.