Britt-Inger Rönnbäck,^* Maj-Liz Nordberg,^** Anders Olsson,^*** Anders Östman<sup>****


*</sup>Britt-Inger Rönnbäck, is a PhD student at the Division of Geographical Information Technology, Luleå University of Technology. She has an MSc in surveying, and a licentiate degree in geographic information technology. Before joining Luleå University of Technology she worked as a software developer and system analyst at the Swedish Space Corporation and at the Swedish Land Survey. She is planning to defend her PhD thesis autumn 2003. The thesis concerns spatial data quality and data usability. Her address: Department of Environmental Engineering, Geographical Information Technology, Luleå University of Technology, SE-971 87, Luleå, Sweden. britt-inger.ronnback@sb.luth.se
^**Maj-Liz Nordberg, PhD, is a senior lecturer at the Department of Physical Geography and Quaternary Geology, Stockholm University carrying out research in applied remote sensing. Her current research focuses on various change detection aspects for monitoring purposes. The primary field site is the Swedish mountain range. Her address: Department of Physical Geography and Quaternary Geology, Stockholm University, SE-106 91, Stockholm, Sweden. maj-liz.nordberg@natgeo.su.se
^***Anders Olsson, is a PhD student at the Division of Geographical Information Technology, Luleå University of Technology. His research deals with questions concerning spatial data quality and automatic methods for such assessments. His address: Department of Environmental Engineering, Geographical Information Technology, Luleå University of Technology, SE-971 87, Luleå, Sweden. anders.olsson@sb.luth.se
^****Anders Östman, is a professor at the Division of Geographic Information Technology, Luleå University of Technology, and the head of the division. He has an MSc in surveying and a PhD in photogrammetry. He has also worked for Intergraph, an American GIS software vendor. Since 1993, Anders Östman has gradually established the research and educational facilities in GIS at Luleå University of Technology, where he received a full professorship in 1997. His research concerns spatial data quality. His address: Department of Environmental Engineering, Geographical Information Technology, Luleå University of Technology, SE-971 87, Luleå, Sweden. anders.ostman@sb.luth.se