ARCHITECTURAL HERITAGE 3D MODELLING USING UNMANNED AERIAL VEHICLES MULTI-VIEW IMAGING

Abstract. Today, Architectural Heritage 3D models are created using Unmanned Aerial Vehicles (UAV) imagery and processing through Computer Vision (CV) methods. They becoming more acceptable as reliable sources for study, documentation, diagnostics, intervention planning, monitoring, management decision-making. The Deir-e-Kaj caravanserai, located in Qom, Iran, is a massive half-destroyed architectural heritage that belongs to the Seljuk era. obstructed access due illegal deep excavations extensive demolished structure did not allow complete mapping traditional terrestrial techniques. Considering condition vulnerability of artifact, it looks necessary use safe, non-destructive, remote method documenting. literature review shows most research UAVs used acquiring nadir images, which combined with terrestrially acquired data modelling. In this case, multi-view UAV imaging strategy considered as-is modelling Deire-e-Kaj. Three different angles designed carry out comprehensive all-needed acquisition. images cover plan enclosure, horizontal oblique façades interior spaces artifact. Adopting suitable photogrammetric process based on SfM workflow allows obtaining an accurate, high-quality, textured model caravanserai. Accuracy evaluation result Ground Control Points total accuracy ±1 cm. This study demonstrates efficiency photogrammetry rapid, precise create massive, hard-to-access, vulnerable Heritage.