Criterion level	Indicator level	Index description	Indicator attributes	Weight
Natural factors	Terrain slope	The slope is divided into 5 grades in sequence with 25˚, 15˚, 6˚, and 2˚ as the boundary	+	0.0851
Natural factors	Soil thickness	Taking 30 cm, 60 cm and 100 cm as the boundary, Soil thickness, divided into four levels in turn	+	0.1007
Demographic factors	Urbanization rate	Urbanization rate of local townships	+	0.2082
	Proportion of young and middle-aged population	Proportion of population aged 18 - 50 in local townships	−	0.0843
	Proportion of employees in secondary and tertiary industries	Proportion of population engaged in secondary and tertiary industries in local townships	+	0.1083
Land use status	Intensity of settlements	Intensive degree of patches in various rural residential areas	+	0.1279
Land use status	Farm-to-civil ratio	Area of cultivated land/area of residential area	−	0.2855