Nowadays, a semantic 3D city model of the German capital Berlin is freely available to the public as open data in CityGML format, which comprises around 550,000 LoD2 building objects within the whole city area (890 km²). The open data is provided via a web-based service portal through which users can select and download individual building models in a variety of 3D data formats. In addition, the Berlin CityGML model has been exported to a tiled KML/glTF dataset using 3DCityDB and can be explored using the 3DCityDB-Web-Map-Client.
