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Spatial distribution of rocky desertification under different sampling scales: (a) 150 m × 150 m sampling scale; (b) 300 m × 300 m sampling scale; (c) 450 m × 450 m sampling scale; (d) 600 m × 600 m sampling scale; (e) 750 m × 750 m sampling scale; (f) 900 m × 900 m sampling scale. NSD is non-karst region; PSD is potential rocky desertification; LSD is slight rocky desertification; MSD is moderate rocky desertification; HSD is severe rocky desertification.
