Authors and Affiliations: 

Andreas Aagaard Christensen, University of Copenhagen, Faculty of Life Sciences, Frederiksberg, Denmark
Stig Roar Svenningsen, Royal Danish Library, Department of Maps and Prints, Copenhagen, Denmark
Anna Verhoeve, Institute for Aricultural and Fisheries Research, Social Sciences Unit, Belgium
Marc Antrop, University of Gent, Department of Geography, Gent, BE-9000, Belgium
Jesper Brandt, Roskilde University, Department of Environmental, Social and Spatial Change, Denmark