Abstract. For the past decades, Cultural Heritage (CH) is commonly documented by digital-based imaging and analytical techniques. This documentation is used as a support by heritage scientists to study and help the preservation of CH objects. Multiple techniques or modalities are usually required and applied to complete the documentation and the possible diagnostic from it. In this paper we explored multimodal imaging strategies to survey, analyse and share semantically enriched digital replicas. Three challenging case-studies from the SUMUM research project aims to illustrate efficient multi-source approaches in multi-scalar, multi-temporal and multi-spectral contexts. From multimodal data acquisitions, a photogrammetric-based registration method (TACO) has been developed in order to exploit a 2D/3D semantic annotation process implemented into a CH oriented collaborative web platform (AIOLI). In the exemples showed, the structure and the content of the annotations work is based from condition reports provided by conservation and restoration experts. To this end, all the documentation gathered on CH objects are either directly merged by image based registration while complementary analysis can be spatially anchored to annotations as linked resources. The dissemination part is explored by built-in AIOLI’s collaborative features or external Potree-based viewer, to enhance the accessibility of the final 3D annotated scenes for further expertises or wide-public events and purposes.
Abstract. With the development of digital technologies in the documentation methods for cultural and architectural heritage, platforms and tools have emerged as solutions to collect, manage and produce data for multidisciplinary monitoring and studying purposes. In the context of an incident such as the fire of the Notre-Dame de Paris in April 2019, the considerable mobilization of the architects, scientists and researchers, has led the "digital data" working group to conceive a digital ecosystem capable to collect and integrate existing data, produce new data, share and archive, and finally structure and semantically enrich. One of the particular aspects of this works involves an approach to build a complete digital report of the Notre-Dame de Paris cathedral. With the help of photogrammetric acquisitions of the cathedral, leading to point clouds generation, projects were created in the aïoli platform. The structuring of the collected data (condition report, architectural descriptions, chemical and physical analysis…) has then led to the construction of semantic annotations, accompanied by description sheets and attachments. The vast multidisciplinary studies conducted on the cathedral as well as the large number of projects and annotations built over the course of 4 years constitute a singular collection of data, that will be the object of cross comparison and data interpretation in the future years.
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