1. Department of Geology & Geoenvironment, National & Kapodistrian University of Athens, Athens, Greece
2. Department of Surveying & Geoinformatics Engineering, University of West Attica, Aigaleo, Greece
3. Laboratory of Optical Metrology, University of West Attica, Aigaleo, Greece
4. Department of Environmental Engineering, Democritus University of Thrace, Xanthi, Greece