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Table 5 The groups of fitting data in this research

From: Study on the linear absent section ratio (L-ASR) of earthen sites and anthropogenic influence from the perspective of population density

Number of group Average villages population density (PD0)/number per km2 Average distance between castles and villages (r)/km Average linear absent Ratio (L-ASR)
1 6451 0.000 58.95%
2 3819 0.038 18.13%
3 4538 0.050 66.01%
4 2588 0.126 20.07%
5 12,579 0.130 96.85%
6 12,168 0.170 70.40%
7 8923 0.200 71.61%
8 3815 0.210 56.94%
9 17,250 0.226 50.38%
10 6093 0.280 22.04%
11 4319 0.290 14.13%
12 3769 0.300 50.73%
13 7966 0.480 27.79%
14 6575 0.500 52.21%
15 12,147 0.700 96.13%
16 8999 0.800 23.55%
17 19,295 1.710 86.57%