拓扑穿行度指线段位于任意两两线段之间最少拓扑深度的路径的次数或概率，其中两两直接相交的线段之间为一步深度。
拓扑穿行度
Sources
Hillier, B. (2009),Spatial sustainability in cities: organic patterns and sustainable forms. In: Koch, D. and Marcus, L. and Steen, J., (eds.) Proceedings of the 7th International Space Syntax Symposium. (pp. p. 1). Royal Institute of Technology (KTH): Stockholm, Sweden. pp. k01.3-4.