Interoperating Geographic Information Systems Second International Conference, INTEROP'99, Zurich, Switzerland, March 10-12, 1999 Proceedings - Vckovski, Andrej; Vckovski, Andrej; Brassel, Kurt E.; Brassel, Kurt E.; Schek, Hans-Jörg; Schek, Hans-Jörg (Springer Berlin Heidelberg : Imprint: Springer, 1999)