Query processing in a geographic mediation system

  title={Query processing in a geographic mediation system},
  author={Mehdi Essid and Omar Boucelma and François-Marie Colonna and Yassine Lassoued},
Despite various interoperability recommendations, heterogeneity of Geographic Information Systems (GIS) is still an issue. This led to an increasing need for a data integration system that allows transparent and uniform access to spatial data disseminated over a network. In this paper, we describe the internals of query processing in the VirGIS mediation system. Recall that a data mediation system provides users with a uniform access to a multitude of (local/remote) data sources, without… CONTINUE READING

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