Surveying, Analysis and 3D Modeling in Archaeological Virtual Reconstruction. The inner colonnade of the naos of Temple G of Selinunte.

This paper is focused on the virtual reconstruction of a portion of the naos of Temple G of Selinunte, as a case study for the definition of a method of virtual anastylosis and reconstruction of collapsed colonnades in archaeological contexts. Reconstruction is based on the combination of historical research, archaeological analysis, digital surveying, image-based modeling and laser scanning methods. The complexity of the ruins of the temple suggested a thorough archaeological analysis of the fragments of the inner colonnade of the naos. This analysis made it possible to identify reference surfaces and protective or sacrificial surfaces. The study of these surfaces, together with the dimensional data surveyed, provided the information necessary to reposition the fragments in their supposed original position, and thus develop a virtual anastylosis of the colonnade based on reliable data. This experience has shown how virtual reconstruction can be a valid alternative to real re-erection, and can contribute to the advancement of studies of an archaeological monument whilst also ensuring the conservation of the landscape of ruins