Table 3.

Assessment accuracy between different methods and manually extracted method for a small part of the study of area

Date of flight	Item	Method	Unsupervised		Supervised		Index based		Physical based
			Method		Method		Method		Method
		Classes	Shadow	Non-shadow	Shadow	Non-shadow	Shadow	Non-shadow	Shadow	Non-shadow
2014, August	Manually extracted	Shadow	27,039	6742	31,292	2489	32,683	1098	29,455	4326
		Non-shadow	20,485	170,695	8433	182,747	5608	185,572	10,598	180,582
		Total	47,524	177,437	39,725	185,236	38,291	186,670	40,053	184,908
	Assessment accuracy (correctness metric)		80.6%		93.4%		96.7%		87.2%
2015, June	Manually extracted	Shadow	19,038	3917	21,038	1917	21,393	1562	20,084	2871
		Non-shadow	2566	199,440	2109	199,897	1192	200,814	2456	199,550
		Total	21,604	203,357	23,147	201,814	22,585	202,376	22,540	202,421
	Assessment accuracy (correctness metric)		82.9%		91.6%		93.2%		87.5%
2015, July	Manually extracted	Shadow	11,845	2416	13,030	1231	13,320	941	12,497	1764
		Non-shadow	3454	207,246	2561	208,139	1459	209,241	2964	207,736
		Total	15,299	209,662	15,591	209,370	14,779	210,182	15,461	209,500
	Assessment accuracy (correctness metric)		83.1%		91.3%		93.4%		87.6%
2016, May	Manually extracted	Shadow	18,301	3459	19,668	2092	20,268	1492	18,796	2964
		Non-shadow	5697	197,504	3294	199,907	2314	200,887	4198	199,003
		Total	23,998	200,963	22,962	201,999	22,582	202,379	22,994	201,967
	Assessment accuracy (correctness metric)		84.1%		90.4%		93.1%		86.4%