One of the most exciting developments in fighting crime at the turn of the twenty-first century has been the integration of Geographic Information Systems (GIS) into law enforcement, and includes crime analysis. This book provides an overview of the implementation and integration of GIS technology into various aspects of law enforcement, including important mapping concepts and their use in crime analysis. Crime mapping basics are discussed, including pin mapping, mapping 'hot spots', mapping crime density, and creating briefing maps. Other topics include the integration of crime mapping with police decision-making, the use of various forms of spatial modeling in law enforcement, and integrating inter-agency data as part of a regional approach to crime. As a way of better understanding the practical applications, the authors include a list of police agencies providing real crime data and analysis tools on the World Wide Web.