The city of Zurich offers a very detailed 3D city model with roof details and roof overhangs. Zurich was one of the first cities in Switzerland which strictly based its city model on the CityGML data structure. The city model is managed by the Department of Geomatics and Surveying, the GIS Competence Center is one of the main users in the city administration. The urban model is also used extensively by external planners. For this reason, the ongoing update, which has been implemented with the CityGRID® system since 2012, is very important. A special advantage is the good integration of CityGRID® into the given CityGML data structures.

Project Parameters

• Evaluation: Photogrammetric
• Detail: Main roof form with roof details
• Project start: 2008
• Number of buildings: ~30.000
• Roof overhang: complete
• Cadastre-sharp: complete