Point intelligibility, based on axial modelling, aims to detect area structure in cities. It is carried out as following: a subset of the N closest axial lines connected to a root line are first selected, and then intelligibility, the correlation between connectivity and integration RN, is calculated for that subset and then assigned back to the root line.
Dalton, N. S. (2007) Is Neighbourhood Measurable? In: Proceedings of 6th International Space Syntax Symposium, 088-01-12. pp. 088-04-05