The main sources of raster data are raw images (airborne and satellite images) and results of treatments (geostatistical, pixel classification, etc.). The use of raster information will be useful to split vector units when the vector division reaches its limits. The model will be useful to represent information such as natural phenomenon (forest, desert, geology, separation between mountain and valley, rain, inundation, wind, etc.), social phenomenon (population density changes, poverty, etc.) or physical phenomenon (hurricane, etc.), which are diffused in space ( Guesgen, 2000).
This chapter deals with a vector model for fuzzy data sets within a GIS and with the raster and vector combination to refine vector objects.
