基于“点—轴系统”理论的城市群边界识别

高晓路, 许泽宁, 牛方曲

Delineating the scope of urban agglomerations based upon the Pole-Axis theory

Xiaolu GAO, Zening XU, Fangqu NIU

图2 POI核密度等值线的Densi-Graph分析

Fig.2 Densi-Graph analysis of the POI density contour