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One of the major development efforts within the GI Science domain are pointing at sensor based information and the usage of realtime information coming from geographic referenced features in general. At the same time 3D City models are mostly justified asbeing objects for visualization purposes rather than constituting the foundation of a geographic data representation of the world. Thecombination of 3D city models and real time information based systems though can provide a whole new setup for data fusion withinan urban environment and provide time critical information preserving our limited resources in the most sustainable way. Using 3Dmodels with consistent object definitions give us the possibility to avoid troublesome abstractions of reality, and design evencomplex urban systems fusing information from various sources of data. These systems are difficult to design with the traditionalsoftware development approach based on major software packages and traditional data exchange. The data stream is varying fromurban domain to urban domain and from system to system why it is almost impossible to design a complete system taking care of allthinkable instances now and in the future within one constraint software design complex. On several occasions we have beenadvocating for a new end advanced formulation of real world features using the concept of Geospatial Managed Objects (GMO).This paper presents the outcome of the InfraWorld project, a 4 million Euro project financed primarily by the Norwegian ResearchCouncil where the concept of GMO's have been applied in various situations on various running platforms of an urban system. Thepaper will be focusing on user experiences and interfaces rather then core technical and developmental issues. The project wasprimarily focusing on prototyping rather than realistic implementations although the results concerning applicability are quite clear

PROTOTYPING A SENSOR ENABLED 3D CITYMODEL ON GEOSPATIAL MANAGED OBJECTS