GI in Europe: integrative, interoperable, interactive : 4th AGILE conference on geographic science, April 19-21 2001, Brno, Czech Republic / Association of Geographic Information Laboratories in Europe ; edited by Milan Konecny ; co-editors Lucie Friedmannova, Jiri Golan, Miroslav Kolar .  Brno :  Masaryk University,  2001 .  775 s.