ABSTRACT
Fuzzy sets are one of the ways in which modern GeoComputation (GC) can be enriched. Many geographical phenomena can be considered to be vague or poorly defined. Vagueness has a long history in the philosophical literature and is considered by some workers to be one of the major problems for geography in general and geographical information in particular. The semantic form of vagueness is directly addressed by fuzzy set theory; this chapter discusses how geographical objects and processes may be modelled by fuzzy sets and shows some novel products from that modelling. Approaches using direct assignment, indirect assignment and assignment by transformation are illustrated and discussed. The application of fuzzy logic and fuzzy modelling is also identified.
