SIGA3D : modélisation, échange et visualisation d'objets 3D du bâtiment et d'objets urbains géoréférencés ; application aux IFC pour la gestion technique de patrimoine immobilier et urbain

Abstract : This thesis defines a new approach in urban and building facility management. A production and information management process of the building, its immediate environment and urban objects has been defined. It allows to manage these objects throughout their life cycle, in a concept called Urban Facility Management. This technology relies on an Urban Information Model to model all the information of cities and buildings in a dynamic and evolutive ontology. A mechanism for geometric and semantic levels of detail has also been defined to support the scalability of such a system. Indeed, the number of objects to be managed in a scene, compared to a building modeling system, is much higher, as the area of information processing. Also, contextual levels of detail optimize the scene according to semantic criteria.The proposal we made is based on an architecture derived from work in adaptive hypermedia systems. It consists of six layers that aim at solving problems in a systemic form: a connecting layer to data sources, a layer to import these data into the system, a semantic layer, a level of contextualization, a connection layer and an interface layer with the user. This architecture allows the definition of a workflow that we decomposed in an architecture of processes. This one describes how to acquire data from both GIS sources and IFC, but also from CAD in general. Data are then imported into the city information model into an ontology defined using tools from the semantic layer. These tools are composed of a set of operators that aim at defining concepts, relations and logical statements. They are coupled to a mechanism that allows the definition of local contexts used to express contextual levels of details within the ontology. Associated with graphical representations issued from diverse data sources, it become possible to combine several geometric representations, 2D or 3D, to an object of the knowledge base, and choose the representation to be displayed according to semantic criteria. The layer for context management provides contextual information on global data models through a mechanism based on named graphs. Once the ontology is developed, data can be exploited via a graphical engine that has been specially developed and that manages contextual information and levels of details.This architecture of processes has been implemented and adapted to the platform Active3D. Part of the research has been to adapt the formal architecture of the urban information model to the existing architecture. The goal was to provide a solution to the industrial constraints of the project and required performance criteria. The last part of this thesis therefore presents the technical developments necessary to achieve these goals
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Clément Mignard. SIGA3D : modélisation, échange et visualisation d'objets 3D du bâtiment et d'objets urbains géoréférencés ; application aux IFC pour la gestion technique de patrimoine immobilier et urbain. Autre [cs.OH]. Université de Bourgogne, 2012. Français. ⟨NNT : 2012DIJOS050⟩. ⟨tel-00842227⟩

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