Strategic value is calculated by the sum of integration values of all axial lines passing through the body of the space, but excluding the ones merely skirting its edges. This strategic value has been found to correlate with the number of people choosing to stop and make informal use of the public space.
Hillier, B. (1996, 2007), Space is the Machine: A Configurational Theory of Architecture. Space Syntax: London, UK. pp. 123