Quantitative Morphology of Polder Landscape Based on SOM Identification Model: Case Study of Typical Polders in the South of Yangtze River

Table 6

The results of polder landscape morphology types and the average value of morphology indexes.

Type A—rectangular units	Type A1—low elongation rectangle	n = 119	Type A2—medium elongation rectangle	n = 61	Type A3—high elongation rectangle	n = 16
		= 1.68		= 3.51		= 7.83
		S1 = 0.87		S1 = 0.81		S1 = 0.80
		V = 0.03		V = 0.07		V = 0.12
		S2 = 1.09		S2 = 1.08		S2 = 1.04
		D = 1.28		D = 1.28		D = 1.37
Type B— polygonal units	Type B1—low complexity polygon	n = 123	Type B2—medium complexity polygon	n = 41	Type B3—high complexity polygon	n = 21
		= 1.59		= 2.48		= 2.20
		S1 = 0.72		S1 = 0.65		S1 = 0.51
		V = 0.10		V = 0.21		V = 0.47
		S2 = 1.25		S2 = 1.49		S2 = 1.95
		D = 1.28		D = 1.33		D = 1.35