GIS Polonia 2001 : proceedings - Lechthaler, Mirjanka; Frangeš, Stanislav; Župan, Robert; Unger, Jelena; Lapaine, Miljenko; Rosengarten, Hartmut; Dudić, Tatjana; Ladović, Vedrana; Devčić, Tatjana; Bračun, Damir; Hitrec, Vesna; Debak, Rade; et al. (Hrvatski informatički zbor : Faculty of Geodesy ; Warsaw University of Technology, Faculty of Geodesy and Cartography ; Faculty of Earth Sciences : Faculty of Organisation and Management, 2001)