The Swiss federal office for topography "Swisstopo" was looking for a software solution for automatic 3D building modeling from the data of the topographical landscape model (TLM). In 2012, UVM Systems was commissioned with the implementation of such a solution based on FME and CityGRID^®. The initial data are the building roofs and footprints of the TLM, which are examined, corrected if necessary and combined into 3D building models with roof overhangs and superstructures. The developed workflow for automatic 3D building derivation has been in use at swisstopo since 2014, the resulting 3D data are offered as a product swissBuildings3D 2.0.

 Project parameters

• Subject: Automatic derivation of valid 3D building models from 2.5D GIS data.
• System: FME, C++, C#
• Implementation: since 2012