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- W2954301044 abstract "In this paper, we propose an OBDA approach for accessing geospatial data stored in relational databases using the R2RML mappings and OGC standard GeoSPARQL. On the theoretical side, we provide a formalization of GeoSPARQL in terms of SPARQL entailment regime. For a practical query answering algorithm, we introduce an extension to the existing SPARQL-to-SQL translation method to support GeoSPARQL features. Our approach has been implemented in the system Ontop-spatial, an extension of the OBDA system Ontop for creating virtual geospatial RDF graphs on top of geospatial relational databases. We present an experimental evaluation of our system using and extending a state-of-the-art benchmark. To measure the performance of our system, we compare it to two state-of-the-art geospatial RDF stores –a free and open-source one, and a commercial one– and confirm its efficiency." @default.
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- W2954301044 date "2019-10-01" @default.
- W2954301044 modified "2023-10-17" @default.
- W2954301044 title "Ontop-spatial: Ontop of geospatial databases" @default.
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- W2954301044 doi "https://doi.org/10.1016/j.websem.2019.100514" @default.
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