Combination of HBIM and UAV photogrammetry for modelling and documentation of forgotten heritage. Case study: Isabel II dam in Níjar (Almería, Spain)

Abstract The Isabel II dam is a monumental hydraulic structure built in the middle of nineteenth century Spain. In this study, unmanned aerial vehicle (UAV) photogrammetry was used as data acquisition technique to carry out survey dam’s current state and its surrounding constructions. point cloud obtained by photogrammetric process, together with collected historical in-formation, served basis generate an historic building information model (HBIM) that central core containing all graphical, structural archaeological information. HBIM validated means As-Built for Autodesk Revit®-FARO® plug-in, shows high accuracy respect cloud. results show methodology it possible obtain models representative reality ± 0.05 m. addition, order improve visualization, texture adjustments are made photorealistic rendering model.