Tools for advanced image processing and GIS using ILWIS / Ben GorteDecision-analytic interpretation of remotely sensed data / B.G.H. Gorte, L.C. van der Gaag and F.J.M. van der WelProbabilistic segmentation of remotely sensed images / Ben GorteOpstellen meetsysteem dataverzameling congestie / Ben Gorte, Henk van Zuylen, Serge Hoogendoorn