2013 volume 45(3) pages 532 – 552
doi:10.1068/a44153

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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

Michael Batty

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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