Study on GIS Visualization in Evaluation of the Human Living Environment in Shenyang-Dalian Urban Agglomeration

Table 3

The results of principal component analysis (PCA).

Principal component	Initial eigenvalues
	Eigenvalue (ei)	Contribution ratios (%)	Cumulative contribution (%)
1	5.185	23.567	23.567
2	3.999	18.178	41.745
3	1.994	9.063	50.808
4	1.824	8.292	59.100
5	1.485	6.752	65.852
6	1.461	6.639	72.491
7	1.003	4.557	77.048