The town of Sion (Valais, Switzerland) consists of two distinct parts : the modern and the medieval. The medieval town is governed by the public corporation known as “La Bourgeoisie” and is extremely well preserved. Its rich heritage includes the following notable monuments: the Château de la Majorie, the Hôtel de Ville (Town Hall), Georges Supersaxo’s house, the casino housing the cantonal parliament, the Cathedral of Notre Dame de Sion, the Chapter House and the church of SaintThéodule.
|En partenariat avec Géomètres Centre SA.|
No reliable technical data existed for the Bourgeoisie and Supersaxo Halls, two fine historic interiors in the old town of Sion. The SBMA, the agency responsible for protecting Sion’s cultural heritage, sought to obtain suitable documentation in order to improve communication concerning these architectural jewels.
Laser scanner and photogrammetric surveys enabled us to meet all the requirements. The laser scanner survey yielded a complete 3D archive of the geometry of each hall with an accuracy of the order of 5 mm. The photogrammetry allowed us to position the textured images with similar accuracy thanks to computation using TPLM-3D’s own ImgSurveyor software.
The 3D modelling process produced a final accuracy of the order of 2 cm.
The data supplied to the client thus completely satisifed the requirements of the two tasks: