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Jaromír Kolejka
Institute of Geonics, Academy of Sciences of Czech Republic, Studentska 1768, 708 00 Ostrava-Poruba, Brno Branch, Department of Environmental Geography, Drobného 28, 613 00 Brno, Czech Republic
Martin Klimánek
Mendel University, Faculty of Forestry and Wood Technology, Department of Geoinformation Technology, Zemědělská 3, 613 00 Brno, Czech Republic