3D Scan and HBIM of Thai Hoa Hall for the Conservation of Hue’s Cultural Heritage

Abstract. This study presents a Scan-to-HBIM workflow applied to Thái Hòa Hall, one of the most prominent cultural heritage structures within the Imperial City of Huế, Vietnam. The proposed methodology integrates terrestrial LiDAR scanning, high-resolution photogrammetry, and semantic-based HBIM modeling to construct a comprehensive digital representation of the site. The project introduces a classification system informed by on-site restoration practices and develops an HBIM model encompassing metadata on materials, structural functions, and repair history. This approach enables the documentation of both structural precision and symbolic elements, resulting in a multi-layered digital record that supports long-term preservation. The resulting HBIM model serves multiple purposes, including restoration planning, archival conservation, and public visualization. As the first fully implemented HBIM project within the Huế Monuments Complex, it also offers a valuable template for integrating digital technologies with traditional craftsmanship in the context of heritage conservation.