Table 2.

Classification of overall accuracy and Kappa coefficient of the two classification methods.

Region	Satellite Sensor	RF		GBDT
		OA (%)	Kappa	OA (%)	Kappa
A	GF-2 (1 m)	88.03	0.85	88.43	0.86
	GF-2 (4 m)	89.50	0.87	90.29	0.88
	SPOT-6	91.56	0.89	92.19	0.90
	Sentinel-2A	89.73	0.87	91.85	0.89
	Landsat-8	84.54	0.80	87.01	0.84
B	GF-2 (1 m)	86.53	0.83	88.83	0.86
	GF-2 (4 m)	91.01	0.89	92.81	0.91
	SPOT-6	90.57	0.90	92.05	0.90
	Sentinel-2A	91.17	0.89	90.39	0.88
	Landsat-8	85.57	0.82	86.96	0.83