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The reconstruction of 3D city models has matured in recent years from a research topic and niche market to commercial products and services. When constructing models on a large scale, it is inevitable to have reconstruction tools available that offer a high level of automation and reliably produce valid models within the required accuracy. In this paper, we(More)
Existing tools for 3D building reconstruction usually apply approaches, which are either based on constructive solid geometry (CSG) or boundary representation (B-Rep). After a brief discussion of their respective advantages and disadvantages, the paper will present an alternative approach based on cell decomposition. This type of representation is also well(More)
The paper proposes a novel approach for a scale-dependent geometric simplification of 3D building models that are an integral part of virtual cities. In contrast to real-time photorealistic visualisations, map-like presentations emphasize the specific cartographic properties of objects. For buildings objects, such properties are e.g. the parallel and(More)
The paper presents an automatic approach for the generalisation of 3D building models with regard to the visualisation of urban landscapes. Simplified versions of such models are not only needed for level of detail structures in real-time rendering, but also for web-based 3D GIS and for the presentation on mobile computing devices. To yield more(More)
Geographic Information Systems (GIS) and Computer Aided Facility Management-Systems (CAFM) are currently undergoing the transition to storing and processing real 3D geospatial data. Applications for this type of data are, among others, location based services, navigation systems and the planning of large-scale construction projects. For presentation(More)
The paper presents the results of the project GISMO, which aimed on generating and interactively visualising a 3D urban landscape model of the city of Stuttgart, Germany. With respect to the desired flexibility to support walkthrough and flyover applications, a combined approach using continuous level of detail, the impostor technique and a method for(More)