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Users, Ontologies and Information Sharing in Urban GIS

Many applications involve tasks that require the sharing of geographic information. Interoperable solutions provide end users with a means to retrieve and share data. Data and knowledge exchange among users of urban information systems presents many challenges. This paper discusses the role of user communities in specifying the concepts behind their everyday work with geographic information and how the resulting knowledge can be reused. The result of the user specifications is an ontology that is used to build ontologydriven geographic information systems.