1. GIScience, Institute of Geography, Heidelberg University, 69120 Heidelberg, Germany
2. Institute of Geography, University of Tübingen, 72070 Tübingen, Germany
3. Institut für Umweltphysik, Heidelberg University, 69120 Heidelberg, Germany
4. Heidelberg Center for the Environment, Heidelberg University, 69120 Heidelberg, Germany
5. Heidelberg Institute for Geoinformation Technology gGmbH, 69118 Heidelberg, Germany