Enriching SQWRL queries in support of geospatial data retrieval from multiple and complementary sources

Authors:
Mohamed Bakillah;Mir Abolfazl Mostafavi;Steve H. L. Liang
Affiliations:
Centre de recherche en géomatique, Université Laval, Québec, Canada,Department of Geomatics Engineering, University of Calgary, Alberta, Canada;Centre de recherche en géomatique, Université Laval, Québec, Canada;Department of Geomatics Engineering, University of Calgary, Alberta, Canada
Venue:
ER'12 Proceedings of the 2012 international conference on Advances in Conceptual Modeling
Year:
2012

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Abstract

Finding relevant geospatial information is increasingly critical because of the growing volume of geospatial data available through distributed environments. It is also a challenge for the ongoing development of the Geospatial Semantic Web.Data brokers provide searchable repositories through which users can generally retrieve the requested data. But generally, these mechanisms lack the capacity to find and combine complementary data from multiple sources. However, such capacity is needed to answer complex queries. In this paper, we propose a new type of system that supports geospatial data retrieval from multiple and complementary sources. The system uses the Semantic Query-Enhanced Web Rule Language (SQWRL) to support reasoning with complex queries and to enable combination of complementary and heterogeneous data. We have developed and included in this system a query expansion method for the resolution of semantic heterogeneities. The proposed system is illustrated with an application example.