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%

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