Land use types P values Land use types P values
Cultivated land (α<6°) 0.5 Forest 1
Cultivated land (6°≤α<10°) 0.6 Grassland 1
Cultivated land (10°≤α<15°) 0.7 Water 0
Cultivated land (15°≤α<20°) 0.8 Construction land 0
Cultivated land (20°≤α<25°) 0.9 Unused land 1
Cultivated land (α≥25°) 1