1. Researcher, Geomatics Research and Development srl, Via Cavour 2, 22074 Lomazzo, Italy.
2. Researcher, Geomatics Research and Development srl, Via Cavour 2, 22074 Lomazzo, Italy (corresponding author).
3. Full Professor, Dept. of Civil and Environmental Engineering, Politecnico di Milano, P.za L. da Vinci 32, 20133 Milano, Italy.
4. Assistant Professor, Dept. of Civil and Environmental Engineering, Politecnico di Milano, P.za L. da Vinci 32, 20133 Milano, Italy.
5. Professor Emeritus, Dept. of Civil and Environmental Engineering, Politecnico di Milano, P.za L. da Vinci 32, 20133 Milano, Italy.