1. Turning a point cloud into a Building Information Model (BIM) : defining and validating the accuracy requirements for existing buildingsKatja Žagar, Laurens Jozef Nicolaas Oostwegel, Katja Malovrh Rebec, 2025, published scientific conference contribution Abstract: Digitization of existing buildings is one of the main future goals, leading to efficient planning, renovation and maintenance. Among the existing buildings, a significant share is protected as a cultural heritage and their management is supervised because interventions on the protected sites are limited. Building information modeling (BIM) provides the opportunity to integrate accurate as-built information into the digital environment where it can easily be accessed and used. A digital representation of building creation usually starts with the acquisition of spatial data (point cloud), which is then used to create a semantically enriched model with certain geometric accuracy (BIM). In order for the model to serve its purpose, it is important to define how accurate the model should be. Since there are currently insufficient definitions of geometric requirementsfor specific BIM use cases, the research hypothesis was that the quality of BIM greatly depends on the modeler. The identified issue was approached with a study case. Using the point cloud of the existing building, the BIM was made and validated based on pre-defined accuracy requirements. Different accuracy validation methods were used in the process. Based on the results of the study case, conclusions and recommendations for efficient BIM creation were prepared.
Keywords: digitalization of existing buildings, point cloud, building information model, BIM, geometric accuracy
Published in DiRROS: 18.02.2025; Views: 898; Downloads: 489
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2. Digitalization of culturally significant buildings: ensuring high-quality data exchanges in the heritage domain using OpenBIMLaurens Jozef Nicolaas Oostwegel, Štefan Jaud, Sergej Muhič, Katja Malovrh Rebec, 2022, original scientific article Abstract: Cultural heritage building information models (HBIMs) incorporate specific geometric and semantic data that are mandatory for supporting the workflows and decision making during a heritage study. The Industry Foundation Classes (IFC) open data exchange standard can be used to migrate these data between different software solutions as an openBIM approach, and has the potential to mitigate data loss. Specific data-exchange scenarios can be supported by firstly developing an Information Delivery Manual (IDM) and subsequently filtering portions of the IFC schema and producing a specialized Model View Definition (MVD). This paper showcases the creation of a specialized IDM for the heritage domain in consultation with experts in the restoration and preservation of built heritage. The IDM was then translated into a pilot MVD for heritage. We tested our developments on an HBIM case study, where a historic building was semantically enriched with information about the case study’s conservation plan and then checked against the specified IDM requirements using the developed MVD. We concluded that the creation of an IDM and then the MVD for the heritage domain are achievable and will bring us one step closer to BIM standardisation in the field of digitised cultural buildings.
Keywords: HBIM, IFC, MVD, IDM, conservation plan, FOSS
Published in DiRROS: 07.06.2023; Views: 1465; Downloads: 693
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3. Old buildings need new ideas : holistic integration of conservation-restoration process data using heritage building information modellingKatja Malovrh Rebec, Boris Deanovič, Laurens Jozef Nicolaas Oostwegel, 2022, original scientific article Abstract: The preservation of cultural heritage and the renovation, restoration and remodelling processes could benefit greatly from Building Information Modelling (BIM) workflows being established. Currently, experts are involved with fractionated workflows, where a lot of data are missing, become lost or are duplicated by different stakeholders. All the resulting confusion severely impacts on the preservation of heritage as well as the efficiency of its restoring/remodelling/revitalizing from the point of view of current needs. Heritage information is usually conveyed through conservation-restoration plans and guidelines. In this research, a new methodology for managing the information holistically integrated into the BIM is proposed. The workflow is showcased on a demo-case building that is protected as cultural heritage. Consequently, the conservation plan becomes more accessible, not only for stakeholders in heritage, but also stakeholders responsible for the renovation, such as architects and contractors. This can result in an improved understanding of the heritage and a better revitalization.
Keywords: heritage building information modelling (HBIM), conservation plan, digitisation, revitalization
Published in DiRROS: 07.06.2023; Views: 1523; Downloads: 1244
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