Abstract
Abstract. The implementation of new technologies often leads research towards experimentation with new methodological approaches. The BIM process applied in cultural heritage is increasingly consolidating its practices, expanding its potential even in the field of archaeological research. Integrating archaeological data into BIM models has clear benefits but, due to the complexity of the involved elements, archaeological case studies can fit effectively into the BIM process only with the creation of semantic-aware libraries implementing dedicated objects. Cultural heritage can advantage of BIM-based knowledge management only integrating approaches and tools with different characteristics from those commonly used in BIM workflows. In the phase of the geometric modeling process, following that of the survey process and preparatory to the subsequent information modeling process, when the detected geometries are not easily traceable to libraries of pre-compiled objects, an alternative to the so-called "Scan to BIM" local modeling can be represented by algorithmic modeling. The paper, focusing on the geometric modelling phase of the HBIM process, presents first results and prospective tasks of an ongoing research project on the last architectural phase of the colonnade of a multilayered temple in the Antas valley in Sardinia (Italy), affected by imposing works of anastylosis and restoration.
Highlights
1.1 Geometric modeling process: modeling options in HBIM environmentThe Historic Building Information Modelling (HBIM) is increasingly consolidating its practices, expanding its potential even in the field of archaeological research (Garagnani el al., 2016)
In HBIM process, trying to combine the BIM methodology with the issues related to built heritage, two major problems are linked to the automation of the segmentation of point clouds and to the creation of reusable parametric complex objects
Once we have modelled the first column of the temple of Antas, having to make changes to the model or generate new ones, restart the algorithms by changing the input parameters to get the new column
Summary
The Historic Building Information Modelling (HBIM) is increasingly consolidating its practices, expanding its potential even in the field of archaeological research (Garagnani el al., 2016). When dealing with complex construction elements BIM for heritage uses is often based on a geometric modelling commonly referred to the so-called "Scan to BIM" process, made possible today thanks to the constant progress in data capture skills and software It would be good practice, when possible, to construct object libraries by tracing back the geometry of point clouds to simplified geometries, in order to obtain effective models to which data can be associated. Starting from the need for documentation of existing assets, survey and digitalization process of the different instances in historic buildings or archaeological sites involves a review of the traditional modeling techniques, as polygonal models or NURBS surfaces, not so effective in BIM environment.
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