1. Department of Visitor Management and National Park Monitoring, Bavarian Forest National Park, Grafenau, Germany
2. Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
3. German Remote Sensing Data Center (DFD), German Aerospace Center (DLR), Weßling, Germany
4. Geoinformation in Environmental Planning Lab, Technical University of Berlin, Berlin, Germany
5. Center for Remote Sensing of Land Surfaces, University of Bonn, Bonn, Germany
6. Department of Geography, University of Bergen, Bergen, Norway
7. Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Koppang, Norway