Our system consists of four subsystems (figure 1):

• a geographic data subsystem for acquiring, converting, transferring and displaying maps,
• a knowledge subsystem to store knowledge in the rules base and the linguistic base,
• an inference subsystem to generate new maps by using
• all the bases,
• the fuzzy inference engine and
• specific modules,
• an interface to control knowledge acquisition, maps management and inference process (fuzzyfication, inference, defuzzyfication, storage) with a formal language using key words.