Rappresentare in 3D: il rilievo per un modello HBIM

When studying the morphology of historic buildings the acquisition of point cloud or polygonal mesh patterns coupled with the integration of traditional survey, lay the basis for the formulation of a study integrating more skills. Concepts like resolution, accuracy and precision combined with alignment of scans, mesh creation, optimum decimation, texturization to extract the desired output are the right parameters on which we can establish a new approach for studying historical heritage. Also the precise 3D dataset that can derive from it may become the stone of comparison for more in-depth studies. Geometry acquired by a scientific survey transformed in parametric elements can be used as a tool to carry out both architectural and historical and constructive choiches. In the case study here proposed, Villa Medicea Poggio a Caiano, this survey approach led to a specific BIM application, where the point cloud is the initial step of a much more articulated reverse assembling of building elements, fostered by digital modeling and virtual representations. The proposed case study takes advantage of the point cloud to build a BIM environment to manage wider datasets about the architecture’s identity, history, lifecycle and use over the years. Paying attention to the initial building stage original components can be isolated, simulations, analysis and virtual reconstruction of different architectural solutions can be shared, to better understand the legacy of the Renaissance. In a BIM environment all the knowledge gathered behind the observable architectural components of the artefact, including the historical notes, the conditions of the materials or even the details on how they have been correctly assembled, can be connected to digital models derived from the survey. The object of study presented in this paper refers specifically to the porch surrounding the villa, describing a pipeline from the survey to a parametric model.