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About the Contributors

Dr. Ehlers has been the chairman of several international working groups on GIS and remote sensing for the International Society for Photogrammetry and Remote Sensing. He has organized and chaired a number of national and international conferences and workshops including the SPIE (International Society for Optical Engineering) conferences “Remote Sensing for Environmental Monitoring, GIS Applications and Geology,” in Toulouse, France (2001); Aghia Pelagia, Crete, Greece (2002); Barcelona, Spain (2003); Maspalomas, Spain (2004); and Bruges, Belgium (2005). Over the last 10 years, Dr. Ehlers has been principal or coprincipal investigator on more than 50 funded research grants totaling over 7.5 million euros, as well as a number of research projects from different funding agencies, including U.S. National Science Foundation (NSF); European Union; German Research Foundation (DFG); German Ministry for Science and Technology (BMBF); German Ministry of the Interior (BMI); NASA; German Agency for Space Applications (DARA); Ministry of Environment, Lower Saxony; Ministry of Science, Lower Saxony; German Environmental Foundation (DBU); Federal Commission for Education and Research (BLK); University of California at Santa Barbara, California; International Institute for Aerospace Survey and Earth Sciences (ITC), The Netherlands; and the German Agency for Technical Cooperation (GTZ).