Table 2. Results of Accuracy Assessment Based on 1208 Underwater Reference Pointsa 

Benthic Type	Sand	Sea Grass With Sand	Dense Sea Grass	Sand With Benthic Algae	Coral	Coral With Sand	Hard Bottom	Mixed: Sand/Hard Bottom/Coral	Deep Water	Row Total	Producers' Accuracy, %	Users' Accuracy, %	Kappa Coefficient
Sand	228	5	1	3	5	5	6	1	0	254	87.692	89.764	0.828
Sea grass with sand	5	138	4	4	4	9	3	1	2	170	86.250	81.176	0.833
Dense sea grass	0	4	114	7	4	2	1	0	7	139	87.023	82.014	0.834
Sand with benthic algae	3	3	2	39	2	0	1	2	1	53	65.000	73.585	0.836
Coral	5	2	3	3	187	8	4	3	2	217	85.780	86.175	0.831
Coral with sand	11	5	3	2	11	165	3	5	0	205	85.938	80.488	0.832
Hard bottom	6	2	0	1	3	2	59	3	1	77	75.641	76.623	0.835
Mixed: sand/hard bottom/coral	2	1	0	0	2	1	1	28	0	35	63.636	80.000	0.836
Deep water	0	0	4	1	0	0	0	1	52	58	80.000	89.655	0.836
Column total	260	160	131	60	218	192	78	44	65	Total = 1208			 
													
aThe classification results showed an overall accuracy of 83.609%, whereas the overall kappa was found to be 0.808.