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Using Federated Catalogs to Improve Semantic Integration among Spatial Data Infrastructures

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Nowadays, Spatial Data Infrastructures (SDIs) play an important role in government agencies, at different levels: global, national, and local. They aim to improve the management and sharing of geospatial data. Nonetheless, these SDIs have been developed as information islands, in which a user's query is compared to metadata described only in their own catalog services. The lack of interaction among SDIs limits the potential of these infrastructures in providing geospatial data to a larger audience. This article presents a distributed architecture, based on a federation of SDIs which interact among themselves, using query propagation. This propagation facilitates data discovery and sharing. We also describe a distributed query processing service used to enable the resource discovery in distributed infrastructures.

Document Type: Research Article


Affiliations: 1: Paraíba Federal Institute of Science, Education and Technology, Brazil 2: University of Campina Grande, Brazil 3: State University of Paraiba, Brazil

Publication date: October 1, 2011


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