Axial graph (Space Syntax)
Axial graph is the graph converted from an axial map, in which the lines are represented as nodes, and the intersections of lines as connections between the nodes.
Hillier, B., Burdett, R., Peponis, J., Penn, A. (1987), Creating Life: Or, Does Architecture Determine Anything? Architecture et Comportement/Architecture and Behaviour, 3 (3) 233 - 250. pp. 237
Turner, A., Penn, A., Hillier, B., (2005) An Algorithmic Definition of the Axial Map. Environment and Planning B, 425-444. pp. 415-6.