Batty M, 2013, "Visually-Driven Urban Simulation: exploring fast and slow change in residential location" Environment and Planning A 45(3) 532 – 552
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Visually-Driven Urban Simulation: exploring fast and slow change in residential location
Abstract. A large-scale residential-location model of the Greater London region is being
developed in which all stages of the model-building process—from data input, analysis
through calibration to prediction—are rapid to execute and accessible in a visual and
immediate fashion. The model is structured to distribute trips across competing modes of
transport from employment to population locations. It is cast in an entropy-maximising
framework which has been extended to measure actual components of energy—travel
costs, free energy, and unusable energy (entropy itself)—and these provide indicators for
examining future scenarios based on changing the costs of travel in the metro region.
Although the model is comparatively static, we interpret its predictions in terms of fast
and slow processes—‘fast’ relating to changes in transport modes, and ‘slow’ relating to
changes in location. After developing and explaining the model using appropriate visual
analytics, a scenario in which road-travel costs double is tested: this shows that mode
switching is considerably more significant than shifts in location—which are minimal.
Keywords: spatial interaction, residential location, visual analytics, desktop simulation, energy cost, entropy measures, fast and slow dynamics, scenario testing
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