ISPRS-Archives The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ISPRS-Archives Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. 2194-9034 Copernicus Publications Göttingen, Germany 10.5194/isprs-archives-XLVIII-M-2-2023-1345-2023 A SEMI-AUTOMATED APPROACH TO MODEL ARCHITECTURAL ELEMENTS IN SCAN-TO-BIM PROCESSES Roman O. https://orcid.org/0009-0002-3427-4256 1 2 Avena M. 1 3 Farella E. M. 1 Remondino F. https://orcid.org/0000-0001-6097-5342 1 Spanò A. https://orcid.org/0000-0003-4243-7959 3 3D Optical Metrology (3DOM) unit, Bruno Kessler Foundation (FBK), Trento, Italy Department of Industrial Engineering (DII), University of Trento, Trento, Italy Department of Architecture and Design, Politecnico di Torino, Torino, Italy 26 06 2023 XLVIII-M-2-2023 1345 1352 Copyright: © 2023 O. Roman et al. 2023 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://isprs-archives.copernicus.org/articles/XLVIII-M-2-2023/1345/2023/isprs-archives-XLVIII-M-2-2023-1345-2023.html The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XLVIII-M-2-2023/1345/2023/isprs-archives-XLVIII-M-2-2023-1345-2023.pdf

In the last years, the AEC (Architecture, Engineering and Construction) domain has exponentially increased the use of BIM and HBIM models for several applications, such as planning renovation and restoration, building maintenance, cost managing, or structural/energetic retrofit design. However, obtaining detailed as-built BIM models is a demanding and time-consuming process. Especially in historical contexts, many different and complex architectural elements need to be carefully and manually modelled. Meshes or surfaces and NURBS or polylines, derived from 3D reality-based data, are recently used as a reference for the HBIM accurate modelling. This work proposes a comprehensive and novel semi-automated approach to reconstruct architectural elements through the Visual Programming Language (VPL) Dynamo software and a Boundary-Representation method (B-rep), starting from 3D surveying data and point clouds classification. A wide package of scripts provides solutions for modelling complex shapes and transferring the obtained 3D models into BIM Authoring tools for a complete reconstruction phase. The presented procedure, useful for different BIM or HBIM applications, proved to reduce the modelling time significantly.