Visualization of building models and factual data integrated by CityGML

Focus of this paper lies on the enrichment of 3D models with features extracted from IR images and on the integration of factual data, multiple image textures, and meta data into a semantically-geometrical model. In the last year CityGML was developed to capture geometric data and links to textures images as well as factual data and meta data of 3D city models. Multiple textures given by, e.g. different sensors (visual and IR) or taken at different time to record the thermal behaviour of a building, can not be considered in CityGML. But, due to the open source individual extensions can be easily integrated. Open source viewer like Aristoteles has to be adapted to explore the scene and to visualize these different features and data.