The foreground network is constituted by the spaces maximising natural co-presence and linking centres at all scales. See: Generic city.
Hillier, B. (2001), A Theory of the City as Object: Or, how spatial laws mediate the social construction of urban space. In: Proceedings of 3rd International Space Syntax Symposium Atlanta 2001, 02.1-02.28. pp. 02.21;
Hillier, B. (1996, 2007), Space is the Machine: A Configurational Theory of Architecture. Space Syntax: London, UK. pp vi.