1. Department of Geographical and Historical Studies; University of Eastern Finland; Yliopistokatu 2, P.O. Box 111 80101 Joensuu Finland
2. Department of Geography and Geology; University of Turku; 20014 Turun yliopisto Turku Finland
3. Finnish Environment Institute, SYKE; Mechelininkatu 34a 00251 Helsinki Finland
4. Department of Real Estate, Planning and Geoinformatics; Aalto University; Vaisalantie 8, P.O. Box 15800, 00076 Aalto Espoo Finland
5. Finnish Geospatial Research Institute, National Land Survey of Finland; Geodeetinrinne 2 02430 Masala Finland