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

Heritage Science

Table 6 The factors data in the PCA research

Castle number	Counties	PD_r (number per km²)	Annual rain (mm)	Annual wind speed (m/s)	Number of earthquakes per decade
1	Ledu	3513	298	1.84	722
2	Ledu	2778	298	1.84	722
3	Ledu	4974	298	1.84	722
4	Ledu	/	298	1.84	722
5	Ledu	/	298	1.84	722
6	Ledu	1655	298	1.84	722
7	Ledu	2290	298	1.84	722
8	Ledu	9965	298	1.84	722
9	Ledu	19,295	298	1.84	722
10	Ledu	2145	298	1.84	722
11	Ledu	5918	298	1.84	722
12	Ledu	8727	298	1.84	722
13	Ledu	7716	298	1.84	722
14	Ledu	7955	298	1.84	722
15	Ledu	6945	298	1.84	722
16	Ledu	6022	298	1.84	722
17	Huzhu	3894	600	1.29	451
18	Huzhu	4716	600	1.29	451
19	Huzhu	3351	600	1.29	451
20	Huzhu	3474	600	1.29	451
21	Huzhu	2683	600	1.29	451
22	Huzhu	6454	600	1.29	451
23	Huzhu	5664	600	1.29	451
24	Huzhu	3271	600	1.29	451
25	Huzhu	8766	600	1.29	451
26	Datong	3715	520	1.67	184
27	Datong	7049	520	1.67	184
28	Datong	759	520	1.67	184
29	Datong	1573	520	1.67	184
30	Datong	5945	334	1.61	395
31	Datong	4144	334	1.61	395
32	Datong	1994	334	1.61	395
33	Datong	7079	334	1.61	395
34	Datong	2864	334	1.61	395
35	Datong	4412	334	1.61	395
36	Datong	2254	334	1.61	395
37	Datong	1801	334	1.61	395
38	Datong	4798	334	1.61	395
39	Datong	3481	334	1.61	395
40	Minhe	1998	347	1.63	144
41	Minhe	2805	347	1.63	144
42	Pingan	15,641	335	2.29	380
43	Pingan	6194	335	2.29	380
44	Xining	6525	385	1.55	22
45	Xining	19,048	385	1.55	22
46	Guide	2282	368	1.95	102