Development of an Extension for CityGML 3.0 for Fire Prevention Projects

To elaborate on a technical fire and disaster prevention project, information about the building and its surroundings is key to determining which safety measures should be used. The use of 3D models that integrate GIS and BIM has been a promising tool for this type of analysis, which requires information from different sources in the same environment. This study presents the construction of a conceptual model for an extension of CityGML (Application Domain Extension - ADE) with the necessary information to elaborate a technical fire and disaster prevention project, following the standards of the Fire Department of the state of Paraná, Brazil. In addition to information from IFC models, information obtained from mapping carried out by the UFPRCampusMap (UCM) project at the Federal University of Paraná was also added. To build the ADE, IFC and UCM conceptual model formats were studied, as well as their geometric and semantic correspondence with CityGML. New classes were created, classes for specific attributes, and subclasses derived from existing classes. For a total of 86 attributes, 21 have full correspondence, 27 partially correspond, and 38 have no correspondence. The correspondence of real-world objects to IFC was much greater than that of CityGML, since the latter had more generic classes regarding the interior of the building. Using this model, it will be possible to implement this extension in 3D models, as a suggestion for future studies.