Methods, formalisms and tools for the semantic-based surveying and representation of architectural heritage

International audienceA synthesis is presented of several research works carried out at the MAP-Gamsau Laboratory (CNRS/MCC) within the last 10 years concerning the acquisition, the geometric modeling and the semantic enrichment of spatial data related to historic buildings through the design and the development of methods, formalisms and tools. Following the definition of a hybrid approach (combining photogrammetry and laser scanning) for the 3D reconstruction of building morphology, our research focuses on the definition of spatial information systems at the architectural scale (NUBES). These research works, carried out within the framework of the digitization plan of the French Ministry of Culture and Communication, aim to identify the potential of structuring heterogeneous information within semantically enriched 3D models of heritage buildings according to multiple contexts: the documentation of the state of conservation, the indexation and retrieval of iconographic sources, the analysis and representation of spatiotemporal change