Most of the papers contained in this volume grew out of presentations given attheInternational Workshop StatGIS03 InterfacingGeostatistics, GISand Spatial Data Bases, which was held in Portschach, Austria, Sept. 29 Oct. 1, 2003, and ensuing discussions, afterwards. Some of the papers are new and have not been given at the conference. Therefore, most of the papers should not be considered as conference proceedings in its original sense but rather moreasself-containedandactualcontributionstothethemeoftheconference, the interfacing between geostatistics, geoinformation systems and spatial data...