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Use of the client’s existing aerial imagesCOWI will use existing aerial images taken by a Vexcel camera as well as the official building footprints from cadastral survey. The 3D city model will be derived using photogrammetry and strong in-house developed 3D capturing and editing software tools.
Highly sophisticated 3D model for GIS The 3D city model that COWI produces is not only highly detailed and accurate, but also fulfils major requirements by the client to use the data in its GIS. The 3D data is therefore combined with the existing cadastral 2D footprints and split accordingly to have a consistent 3D vector model that fits to the existing 2D footprints.
Overhanging roofs are generated, geometric attributes like volume, inclination etc. calculated automatically and stored along with attributes coming from the existing 2D dataset.The 3D model will be delivered in three coordinate systems (MN03, MN95, WGS84) in the geodatabase format (ESRI).
Applications3D city models are powerful datasets with various applications like GIS analysis, urban planning, homeland security, tourism, web-based 3D visualization and many more.
Facts about the projectThe 3D city model of the canton of Geneva will be used for various applications within the client’s Geographic Information System.COWI’s assignmentGeneration of the 3D model of approx. 76.000 buildings on about 245sqkm using existing stereo aerial images (photogrammetry) as well as 2D cadastral footprints and delivery in the geodatabase format (ESRI).ClientCanton of GenevaProject Period2008 - 2009
3D Territory Modelling Race Has Begun.Article in GEOconnexion International Magazine, Dec/Jan 2010 (pdf) by Laurant Niggeler, Director and Canton Surveyor.
The 3D model of Geneva has been awarded the price Imagina 2010 for the “Best 3D Territory Model” in the category “Landscape & Territory. Read more in the Animago Award catalogue (pdf)