CONVR 260: BIM-based AR Global Alignment Strategy via Single-Room Anchoring for Indoor Environments

Authors: Su-Ling Fan(1), Kuan-Chia Huang(2), Chun-Tin Wu(3), Soheila Kookalani(4), Ioannis Brilakis(4), Faustyn Recha(5), Łukasz Walusiak(5) (1)Department of Civil Engineering, and Research Development Center of Construction Law; Tamkang University; (2)Department of Civil Engineering, and Director of Research Development Center of Construction Law; Tamkang University; (3)Research Development Center of Construction Law, Tamkang University; (4)Department of Engineering, University of Cambridge, United Kingdom; (5)Faculty of Architecture, Civil Construction and Applied Arts, Academy of Silesia Abstract: Accurate indoor spatial alignment is essential for applying augmented reality in construction and renovation environments, yet conventional augmented reality methods often rely on simultaneous localization and mapping or additional sensing infrastructure that is difficult to deploy indoors. This study proposes a building information modeling - based augmented reality system that achieves global indoor alignment by anchoring a single reference room. Once aligned, the entire indoor model remains spatially stable as users move between rooms, without requiring repeated scanning or environment mapping. On-site testing in an indoor renovation environment demonstrates that the proposed approach provides stable augmented reality visualization, reliable room identification, and consistent viewing orientation, even in visually repetitive spaces. This system offers a scalable and deployment-friendly alternative for indoor augmented reality applications in the architecture, engineering, and construction domain by leveraging the inherent spatial structure of building information model. ________________________________________