ABSTRACT
A wide variety of techniques are used to model discontinuities in urban evolution. An account of the history or urban development, as a sequence of initial conditions, illustrating path dependence. The cost function and demand-side dynamic ideas to build up a framework for identifying and analysing discontinuities in urban models. This chapter shows the results of applying methodology to two examples, the Greater London and South Yorkshire retail systems, which allows exploring the policy applications for modern visualisation technique. There is also the option to visualise the money flows into any retail zone and out of any residential zone during a model run. The computer graphics to visualise a large amount of detail in the results grid, which allows to move around and explore it. In constructing the Dj (Wj) curve, for each Wj point, the model can rerun to equilibrium maintaining the condition of constant total floor space.
