A Procedure to Import a Complex Geometry Model of a Heritage Building Into Bim for Advanced Architectural Representations

Abstract

Abstract. The aim of this communication is to present the advantages and disadvantages of a Scan-to-BIM process applied to a heritage building in order to obtain advanced technical drawings to be used in the analysis and illustration of the project. The whole process described includes: the survey planification and data acquisition with a Terrestrial Laser Scanner; the processing and cleaning of the point cloud; the 3D mathematical modelling; a proposal for semi-automatic modelling of organic elements; and the import of the final model into a BIM environment. Rhinoceros (McNeel) and Revit (Autodesk) are the main programs used. The crucial aspect of this workflow is found at the moment of importing the geometrical model into Revit, having to accommodate the criteria of this program in terms of tolerances, geometric structure of the solids, incompatibilities with NURBS libraries, etc. The result is a BIM model divided into families and subcategories where visual attributes can be assigned per element, parameterized and other visual information can be added (orthophotographs, wireframe analysis drawings, etc.). In other words, a 3D model from which highly configurable advanced representations (plans, vertical sections, perspectives, isometric exploded view, etc.) can be obtained and with which to generate analyses from the field of Architectural Graphic Expression.

Extended BIM: a proposed workflow for the integration of the HBIM and EM approaches

“…"Scan-to-BIM" is a reverse-engineering process involving Realty-Based 3D models (i.e., LiDAR and photogrammetric point clouds) used as a reference to manually or, possibly semi-automatically [21], develop an information model suitable to be used for monitoring and scheduled management of a building, particularly focusing on the digitisation of Cultural Heritage. Overlaying all the surveys carried out in the period 2019-2022, the elements that make up the various parts of the Theatre complex have been modelled in Autodesk Revit: the blocks that form the steps and stairs of the Ima and Media Cavea; the complex shapes of the galleries on both sides of the Orchestra; the walls that made up the Pulpitum; and the structures of the Scaenae Frons, the decorated architectural backdrop of the stage.…”

Towards Master Data Management for Cultural Heritage: The Sacri Monti Web Platform

“…On the other side, commercial components usually ensure longer-term support and more stability, but this comes at a higher price. The modelling phase is undoubtedly time-consuming if carried out with manual methods, a reality-based approach, and high accuracy (Acosta et al, 2022;Spettu et al, 2021). A possible solution is using the point clouds as the geometrical basis.…”

Hbim Modelling for the Architectural Valorisation via a Maintenance Digital Eco-System

“…On the other hand, scan-to-BIM is still mainly a time and effortconsuming manual process (Rocha et al, 2020), usually employing the generation of specifically developed parametric objects (Chiabrando et al, 2017). Therefore, several experiments concerning automatic surface recognition (Romero-Jarén and Arranz, 2021; Sun et al, 2022) and NURBS modelling of historic architectural decorative apparatuses (Acosta et al, 2022;Barazzetti et al, 2015) can be found in the literature. This kind of application additionally entails a certain degree of automatisation, variously employing Artificial Intelligence (AI) algorithms for automatic segmentation and semantisation of the survey database (Teruggi et al, 2021).…”