[87] Applied Spatial Accessibility Analysis for Urban Design - An integrated graph-gravity model implemented in Grasshopper

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3ondrej-vesely@seznam.cz 4Reinhard. Koenig@ait.ac.at This paper introduces a prototype for a user-friendly, responsive toolbox for spatial accessibility analysis in data-poor environments to support urban design processes. It allows for real-time computation of several evaluation indicators, mostly focused on accessibility related measures. The proposed framework is exemplified with three real-world case studies. Each of them demonstrates one part of the workflow; data gathering and preparation, sketching and developing scenarios, and impact analysis and scenario comparison. Keywords: accessibility, urban design, evidence-based design, graph model, gravity model INTRODUCTION Under the assumption that cities are large complex systems, the question arises of how much planning and regulations are desirable. On the extremes, there are two distinct approaches to the urban planning process; 1) readily designing cities and quarters down to the shape of the roof or 2) supporting the selforganization process and consciously plan with it while protecting public interests and the commons.