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id cf2017_084
authors Chen, Kian Wee; Janssen, Patrick; Norford, Leslie
year 2017
title Automatic Generation of Semantic 3D City Models from Conceptual Massing Models
source Gülen Çagdas, Mine Özkar, Leman F. Gül and Ethem Gürer (Eds.) Future Trajectories of Computation in Design [17th International Conference, CAAD Futures 2017, Proceedings / ISBN 978-975-561-482-3] Istanbul, Turkey, July 12-14, 2017, pp. 84-100.
summary We present a workflow to automatically generate semantic 3D city models from conceptual massing models. In the workflow, the massing design is exported as a Collada file. The auto-conversion method, implemented as a Python library, identifies city objects by analysing the relationships between the geometries in the Collada file. For example, if the analysis shows that a closed poly surface satisfies certain geometrical relationships, it is automatically converted to a building. The advantage of this workflow is that no extra modelling effort is required, provided the designers are consistent in the geometrical relationships while modelling their massing design. We will demonstrate the feasibility of the workflow using three examples of increasing complexity. With the success of the demonstrations, we envision the utoconversion of massing models into semantic models will facilitate the sharing of city models between domain-specific experts and enhance communications in the urban design process.
keywords Interoperability, GIS, City Information Modelling, Conceptual Urban Design, Collaborative Urban Design Process
series CAAD Futures
email chenkianwee@gmail.com, patrick@janssen.name, lnorford@mit.edu
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100%; open Celani, G. and Vaz, C. (2012) Find in CUMINCAD CAD Scripting And Visual Programming Languages For Implementing Computational Design Concepts: A Comparison From A Pedagogical Point Of View , International Journal of Architectural Computing, 10, 121–138

100%; open Chen, K. W. and Norford, L. K. (2016) Find in CUMINCAD Workflow for Generating 3D Urban Models from Open City Data for Performance-Based Urban Design , Asim 2016 IBPSA Asia Conference, Jeju, Korea

100%; open Chen, K. W. and Norford, L. (2017) Find in CUMINCAD Developing an Open Python Library for Urban Design Optimisation - Pyliburo , Building Simulation 2017, San Francisco, USA

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