Table 3 Statistical results of the distance between ancient sites and rivers from the Han Dynasty to the Tang Dynasty

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

Distance/km

0–5

5–7.5

7.5–10

10–12.5

 > 12.5

Percentage/%

45.6

16.8

16.2

12.1

9.3

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