兰州-西宁城市群国土空间演化特征及分区优化
罗君, 张学斌, 石培基

Spatial evolution characteristics and zoning optimization of Lanzhou-Xining urban agglomeration in the upper reaches of the Yellow River
Jun Luo, Xuebin Zhang, Peiji Shi
图3 兰西城市群国土空间标准差椭圆及重心分布
Fig.3 The standard deviation ellipse and gravity center distribution of territorial space of Lanzhou-Xining urban agglomeration