As part of the Topographical Landscape Model (TLM), the Swiss federal office of land surveys "swisstopo" decided to provide 3D models of all buildings in Switzerland. The goal is the nationwide survey of all buildings including significant roof superstructures from an 8m side length and roof overhangs. The data are distributed under the product swissBuildings^3D 2.0.
Since 2012, we have been supporting swisstopo in the automatic derivation of 3D building models from 2.5D roof surfaces, which are recorded during the map production for the TLM. The fully automatic process created by us is based on CityGRID® and FME workspaces and provides building models with roof overhangs and superstructures.

Project Parameters

• Evaluation: Photogrammetric - template-based
• Detail: main roof shape
• Project start: 2012
• Number of buildings: 2.700.000
• Roof overhang: Yes
• Cadastre-sharp: No