DepthMap软件中的熵根据从某个空间到其他空间的深度序列，而非深度本身，去计算空间区位的分布。如果很多空间距离某个空间较近，且深度分布是非对称的，熵值就低。如果深度是均称分布，熵值就高。该变量可反映空间布局中重要的拓扑差异。其数学定义，详见Hillier, B. et al (1987) pp. 365; Turner, A. (2001) pp.8.
熵
Sources
Hillier, B., Hanson, J., and Graham, H. (1987), Ideas are in things: an application of the space syntax method to discovering house genotypes, Environment and Planning B: Vol 14, 363-385. pp. 364-365;
Turner, A. (2004), DepthMap4: A Researcher’s Handbook, UCL. pp. 15;
Turner, A. (2001) Angular Analysis. In Proceedings of the 3rd International Symposium of Space Syntax, 1-13.pp.8