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

Table 2

Descriptive statistics of landscape morphology indexes.

Landscape morphology index	Maximum	Minimum	Average value	Standard deviation
Elongation	11.10	1.00	2.42	1.65
Rectangular compactness	0.99	0.42	0.78	0.12
Concavity	0.67	0.00	0.10	0.12
Ellipse compactness	4.28	1.00	1.22	0.30
Fractal dimension	1.47	1.24	1.30	0.04

Note. Sample size n = 381.