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3D4EM
Storage, Update &
Dissemination of 3D City Objects
Kavisha
11-11-2015
User’s Committee Meeting, Utrecht
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CityGML based Interoperability for the
Transformation of 3D Data Models
• 3DTM: 3D Transformation Engine
• An Open Source Initiative for syntactic, semantic and
schematic Interoperability.
• Domains covered:
• 3D GIS models : CityGML
• BIM models : gbXML
• Visualization models : COLLADA & X3D
Commercialization of 3D GIS!!!
Need Open source Initiatives…
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3DTM
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LOD-0
LOD-1
LOD-2
LOD-3
IIRS Campus 3D Model
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3DTM: COLLADA-CityGML Interoperability
COLLADA & CityGML models of Eiffel Tower and Taj Mahal
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3DTM: CityGML-BIM Interoperability
Generated gbXML
model of IIRS
Campus (LOD-3)
Generated IFC
model of IIRS
Campus (LOD-2)
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3D Visualization
üCityGML files become very large(several GBs)
üConverted to X3D, OBJ, etc. for web rendering.
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PhD Research
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• Massive TIN datasets
• AHN3 - Delaunay triangulation
• 3DTOP10NL
• Storage of massive TINs in
database
• Comparison of existing
solutions - trade offs?
• Finding the efficient
approach?
• Defining the data structure
• Implementation …
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• Dissemination
(tailored to user specific
applications)
• OBJ
• CityGML
• WFS for 3D objects and
massive triangulations…
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Thank you!!