1. Institute of Geography, Chair for Environmental Analysis and Planning in Metropolitan Regions, Ruhr University Bochum, Bochum, Germany
2. Institute for Environmental Planning, Leibniz University Hannover, Hannover, Germany
3. Department of Geography, University of Hildesheim, Hildesheim, Germany
4. Spatial Information Laboratory, Department of Spatial Economics, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands