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Table 1 Statistical results of ancient sites distributed on different slopes

From: Temporal and spatial distribution of ancient sites in Shaanxi Province using geographic information systems (GIS)

Slope/° 0–3 3–10 10–25 25–50
From Han to North and South Dynasties 42.7% 26.7% 28.1% 2.5%
Sui and Tang Dynasties 63.6% 23.3% 11.8% 1.3%