Multiscale archaeological survey based on the integration of 3D scanning and photogrammetry

The survey intended as non-invasive diagnostic investigation, has reached an significant level of evolution, but in order to be effective it should own two fundamental features: rapid acquisition and completeness of data. In such way the status of a particular site can be reliably identified, indicating possible pathologies or complex situations, allowing to predict their evolution in time. In our case study both aspects had to be respected because the site is inside a religious place, so that all the measurement sessions had to be constrained into a well defined time frame, and the diagnostics is simultaneously influenced by an area of soft ground influencing the global planarity of the whole roof, and a set of local alterations in the mosaic structure, due to the consequential tension. * Corresponding author. E-mail: g.guidi@ieee.org