The workshop in Liège successfully brought together researchers from the most specialized European centres in the domain: the Jill Dando Institute (University College London) , the Netherlands Institute for the Study of Crime and Law Enforcement (NSCR), the Institute Forensics of Lausanne (University of Lausanne), the Criminal Intelligence Service of Austria, several representatives of the Strategic Analysis and Operational Analysis Services of the Belgian Federal Police, and of course representatives of several departments concerned in the University of Liege. The workshop showed that researches from those centres are strongly diversifi ed with applications such as detection of hot spots, geographical profi ling or crime prevention through environmental design. In order to share good practices, a round table was also organized during the workshop with two recurrent issues: the integration of the temporal dimension in crime mapping and the collaborations between the operational and strategic aspects of the discipline. Five authors agreed to draft a paper about their contribution. They are gathered in this special issue of the Bulletin of the Geographical Society of Liege.