ABSTRACT
Representations have been developed for dynamic phenomena where the challenges stem from the rate of updates and the need to visualise changes rapidly. Indeed, many solutions have been devised to deal with the dynamic aspect of GIS. In the vector model, for example, dynamic segmentation has been developed to allow the representation of changing events along static vector features. This representation is especially common in transport applications of GIS (Longley et al., 2001). In the raster model, dynamic modelling capabilities have been developed and implemented within packages such as PCRaster (Van Deursen, 1995) or IDRISI (Park and Wagner, 1997).
