县市分等方法及中国县市等第特征的分异规律

李一飞, 王开泳, 王甫园

Classification method for counties and cities' gradation and differentiation rule in China

LI Yifei, WANG Kaiyong, WANG Fuyuan

图2 省域尺度分等的不同省份各等第县市数量变化图

Fig. 2 Quantity change of different gradations of the counties and cities at the provincial level