1. A risk mapping system for use in crisis management comprising a database having a plurality of risk maps stored thereon, hazard data associated with each risk map stored on the database, means to access the database and select a particular risk map and associated hazard data, and means to display said selected risk map and associated hazard data characterised in that: a plurality of the risk maps stored on the database are three-dimensional graphical representations of specific locations and in which, for each location having a three-dimensional risk map, there are provided a plurality of three dimensional risk maps from different aspects of that location.