e The drawbacks of standard logic adopted in GIS oper- 
ations are highlighted. 
e The advantages of fuzzy set theory over classical set 
theory and the necessity of incorporating fuzzy logic 
methodologies into GIS operations are presented. 
Future research includes: 
e The design of a prototype spatial decision support sys- 
tem based on fuzzy logic methodologies. 
e The selection of appropriate transformation functions 
and overall measures (information metrics) for the set 
of constraints posed by decision-makers and problem 
specific features in a real-world situation (e.g., residen- 
tial site selection). 
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