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Knowledge transfer from Building Information Model(s) to City CIM?
CITIES – Consortium Meeting (June 2014)
(Al)Fred Heller, Assoc. Prof.
Vice Center Manager for CITIES, DTU
Web: http://smart-cities-centre.org
CITIES – Centre for IT-Intelligent Energy Systems in Cities
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Context
• BIM Introduction
• The Idea
• State of Arte in CIM
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3 Sources: Jan Karlshøj, DTU
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3D CAD Drawing – Geometrical Information
• Represented in a Object Tree
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Interoperability Representation
• Represented IFC og gbxml
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The Revit Implementation
• From Model
• Through Exchange Format
• To Domain Specific Software Applications
6 Source in Danish
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One DB that rules them all
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CIM
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CitySim (by EFLP, Switzerland)
• 3D Building Block Model
• Thermo-Physical properties
• Own simulation model (weak)
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Source: http://http://citysim.epfl.ch/
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CitySim (by EFLP, Switzerland)
• XML structure
– Not documented
– (?)
11 Source: http://http://citysim.epfl.ch/
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UMI (by MIT, USA)
• Based on Rhino (CAD) for building designing
• Utilizes external simulation models = platform
• Aims at GIS representation
• Very weak documentation and support!!!!
• Interoperability measures (?)
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Source: http://urbanmodellinginterface.ning.com/
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Modelica (by RWTA, Aachen University, Germany)
• Based on Modelica Simulation Tool
• IEA EBC Annex 60
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Source: http://http://iea-annex60.org/about.html
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CityGML (by Special Interest Group 3D)
• Based on GIS platform and standards
• XML Schema based
standard IT skills necessary only
high interoperability
• Objects
• Appearance Geography Markup Language
• Bridge Address Language
• Building TextureSurface
• CityFurniture
• CityObjectGroup
• Generics
• LandUse
• Relief
• Transportation
• Tunnel
• Vegetation
• WaterBody 14
Source: http://http://www.citygml.org/
A little arbitrary A good start!!!
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CityGML (by Special Interest Group 3D)
• Based on GIS platform and standards
• XML Schema based
standard IT skills necessary only
high interoperability
• Aggregation
• Simple sum of each building
• Each building is simulated individually
• Performance bottle neck
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Source: http://http://www.citygml.org/
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Conclusion
• Demand for City Level Description
• Examples system approaches are found
• First standard seems to appear
• BIM could be a model
– However
• BIM has weaknesses
• Poster by Panagiota Gianniou and Emmanouil Katsigiannis on our research
– Building Typology
– Building Aggregation
– City Modelling
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