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

Table 1

Summary table of morphology indexes and schematic diagram.

Name of morphology index	Elongation	Rectangular compactness	Concavity	Ellipse compactness	Fractal dimension
Formula of morphology indexes
Schematic diagram of morphology indexes