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Fuzzy logic is a mathematical approach to problem solving. Fuzzy logic bridges the gap between precise valuations done with classical logic, such as that typically implemented with computer systems, and a logic that reasons on uncertainties, vagueness, and judgments. These logical extensions are used in GIS to allow for a wider coverage of uncertainty than is generally available in standard software.

The term fuzzy logic itself has been a source of misunderstanding and has provoked discussions ever since it was created. Fuzzy logic is a formal, logical approach to imprecision rather than an imprecise logic. Fuzzy logic differs from classical logic in that statements are not simply black or white, or true or false. In traditional logic, a statement takes on a value of either 0 ...

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