Industry Foundation Classes AEC 3 United Kingdom Thatcham, Berkshire RG18 3ES Tel: +44-1635 86 4590 Fax: +44-1635 86 0673 email: jeffrey.wix@aec3.com Germany D-80636 München Tel: +49-89-1870 3223 Fax: +49-89-1870 3224 email: thomas.liebich@aec3.com Norwegian IFG project Harmonisation IFC and gml3 Dr. Thomas Liebich, Jeffrey Wix Ltd. Next Generation 3D City Models. Bonn. 21.-22.06.2005
Terms of reference CAD Civil engineering (roads, tunnels, etc.) GIS Town planning, communities CAD Building engineering (buildings, site planning)
IAI Vision & Mission Vision to provide a universal basis for process improvement and information sharing in the construction and facilities management industries. Mission to define, promote and publish a specification for sharing data throughout the project life-cycle, globally, across disciplines and across technical applications using object technology. Deliverables Industry Foundation Classes (IFC TM and ifcxml TM )
IAI International Presence 11 Chapters >25 Countries >600 Organizations North America New! Italy France Iberian United Kingdom Nordic countries New! China Japan Korea German speaking S'pore Australia
IFC Standard International Alliance for Interoperability sets the standard for objectbased data exchange and sharing of virtual buildings international industry-driven cross-discipline all data for the virtual building model object oriented paradigm Industry Foundation Classes is the data exchange and sharing standard for building and construction life cycle information goes beyond CAD information involves engineering and other applications includes whole life-cycle of buildings Is ISO certified ISO/PAS 16739
Why IFC for GIS the IFG scope IFG intended to provide support for: geographic information within the IFC model integration of CAD and GIS data reuse of existing feature catalogues capture of planning applications better visualisation of buildings in GIS better awareness of geographic context in CAD the planning regulations process data transformation between IFC and GML Geographic Markup Language defined by Open GIS Consortium Out of scope providing a complete model for geographic information supporting complex geodetic coordinate systems
Vision for the IFG project Digital data flow supported by standard data formats Defined in the IFC for GIS (IFG) project Authority Construction Check Check Project design Public Databases GIS Property
Different strategies Singapore CORENET Program of the Building and Construction Authority, BCA Goal: to offer advantages to the Singapore market place by offering faster building approvals eplancheck automatic check of building regulations of submissions Norway Byggsøk, responsible for the Norwegian State Authorities for Building tasks What to speed up building submissions and approvals Develops integrated e-submission for building submissions and plans Environment Safety Road authority Submission Check Authority Architect Engineer Inter net Self-Check Inter net Approval Authority analysis Submission check Check of realization architecture construction Building service GIS System Situation map Cadastre
IFC to GML conversion (and back) GML Viewer IFC Viewer Mapping of Feature Mapping of Presentation Mapping of catalogue data
Buildings different levels of detail Levels of Detail (CityModel, Bonn) 0 regional - 2.5d dtm 1 city/site - block model - roof 2 city/site - block model + roof + texture 3 city/site - architectural envelope 4 interior - walkable model Implementation (IFG, KommuneSkjema) 0 footprint - any given representation 1 roofline / footprint - extrusion 2 block model - roof form 3 facade - external faces with holes 4 interior - internal faces 5 full model - solid objects Extraction of simple roof print Roof height obtained Graphisoft ArchiCAD Octaga / GML
Levels of detail - examples courtesy: IFG Level 1 (Extrusion) IFG Level 2 (Block) City Level 1 (Block-roof) City Level 2 (Block+roof) Autodesk / ADT - IFC Octaga / GML Octaga / GML Graphisoft - IFC ESRI / ArcInfo IFG Level 5 (Full) City Level 4 (Walkable) courtesy:
Beyond IFG future issues Organization data Monitoring sensors Air flow around buildings Service life/ lifecycle questions Road/tunnel models Planning regulation & impacts City model interfaces