All line analysis (Space Syntax)
The all line axial map is a set of lines made up of all lines drawn tangentially to vertices (e.g. building faces) that are intervisible.
Penn, A., Conroy, R., Dalton, N., Dekker, L., Mottram, C.,Turner, A. (1997), Intelligent architecture: new tools for the three dimensional analysis of space and built form, in Proceedings of the 1st International Symposium on Space Syntax University College London, London, pp. 30.3-4