1. Department of Geography and Geology; University of Turku; FI-20014 Turku Finland
2. School of Engineering, Department of Real Estate, Planning and Geoinformatics; Aalto University; PO Box 15800 FI-00076 Aalto Finland
3. Department of Geographical and Historical Studies; University of Eastern Finland; PO Box 111 80101 Joensuu Finland
4. Department of Remote Sensing and Photogrammetry; Finnish Geodetic Institute; PO Box 15 FI-02431 Masala Finland
5. Helsinki Metropolia University of Applied Sciences; PO Box 4011 FI-00079 Metropolia Finland