Drones for survey in the field of restoration: a multidisciplinary approach to the preservation of cultural heritage

The use of drones in the field of cultural heritage is increasing thanks to the possibility offered by these tools to acquire, information on those parts of the buildings that are difficult or impossible to access, so they can be a valid tool to support the knowledge of historical heritage. The paper presents the results of a multidiscipli- nary research work conducted on a case study lo- cated in Fisciano, Italy regarding the abandoned ???Madonna del Fieno??? chapel. Built around the fourteenth century, it has undergone several ex- tensions, restorations and transformations. Cur- rently it is in a generalized state of decay as the complete absence of the roof has exposed the environments to atmospheric agents with the consequent occurrence of related decay phe- nomena. The study started from the integrated digital survey of the Church that involved the joint use of laser-scanning and aerial and terrestrial pho- togrammetry. The use of UAVs was essential to obtain a complete and effective survey of the building. Using integrated three-dimensional survey techniques, two-dimensional graphics were ob- tained (floor plans of the area, plans, sections, elevations and orthophotos), thus updating the existing graphic documentation of the site. This documentation has constituted an important and essential tool to support the understanding of the complex with a great impact in the process of ???interdisciplinary??? analysis and interpretation of the building aimed at both knowledge and de- sign.