Institute of Photogrammetry and GeoInformation, Leibniz University Hannover, Nienburger Straße 1, 30167 Hannover, Germany
Geology Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
Department Monitoring and Exploration Technologies, Helmholtz Centre for Environmental Research GmbH-UFZ, Permoserstraße 15, 04318 Leipzig, Germany