an assistant professor in the Department ofGeo-information for Natural Resource Management at theInternational Institute for Geo-lnformation Science and EarthObservation (ITC);
Enschede;
The Netherlands.;
a researcher and assistantlecturer at the Centro de Levantamientos Aerospaciales yAplicaciones SIG para el Desarrollo Sostenible de losRecursos Naturales (CLAS) at the UMSS in Cochabamba;
Bolivia;