Geographic information systems (GIS) deal with data which can potentially be useful for a wide range of applications.However, the information needs of each application usually vary, specially in resolution, detail level, and representation style, as defined in the modeling phase of the geographic database design.To be able to deal with such diverse needs, GIS must offer features that allow multiple representations for each geographic entity of phenomenon.This paper presents a framework for the implementation of multiple representations in GIS with minimum data redundancy, based on a comprehensive set of basic operators from computational geometry, spatial analysis, and map generalization.These operators are used to transform a representation into another, or to generate various presentations from a given representation.
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