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Towards the Next Generation of the Linkedgeodata Project Using Virtual Knowledge Graphs

15 Pages Posted: 26 Oct 2021 Publication Status: Accepted

See all articles by Linfang Ding

Linfang Ding

Free University of Bozen-Bolzano

Guohui Xiao

Free University of Bozen-Bolzano - KRDB Research Centre

Albulen Pano

Free University of Bozen-Bolzano

Claus Stadler

University of Leipzig

Diego Calvanese

Free University of Bozen-Bolzano

Abstract

With the advancement of Semantic Technologies, large geospatial data sources have been increasingly published as Linked data on the Web. The LinkedGeoData project is one of the most prominent such projects to create a large knowledge graph from OpenStreetMap (OSM) with global coverage and interlinking of other data sources. In this paper, we report on the ongoing effort of exposing the relational database in LinkedGeoData as a SPARQL endpoint using Virtual Knowledge Graph (VKG) technology. Specifically, we present two realizations of VKGs, using the two systems Sparqlify and Ontop. In order to improve compliance with the OGC GeoSPARQL standard, we have implemented GeoSPARQL support in Ontop v4. Moreover, we have evaluated the VKG-powered LinkedGeoData in the test areas of Italy and Germany. Our experiments demonstrate that such system supports complex GeoSPARQL queries, which confirms that query answering in the VKG approach is efficient.

Suggested Citation

Ding, Linfang and Xiao, Guohui and Pano, Albulen and Stadler, Claus and Calvanese, Diego, Towards the Next Generation of the Linkedgeodata Project Using Virtual Knowledge Graphs. Journal of Web Semantics First Look , Available at SSRN: https://ssrn.com/abstract=3950411 or http://dx.doi.org/10.2139/ssrn.3950411

Linfang Ding (Contact Author)

Free University of Bozen-Bolzano ( email )

Sernesiplatz 1
Bozen-Bolzano, BZ 39100
Italy

Guohui Xiao

Free University of Bozen-Bolzano - KRDB Research Centre ( email )

Italy

Albulen Pano

Free University of Bozen-Bolzano ( email )

Sernesiplatz 1
Bozen-Bolzano, BZ 39100
Italy

Claus Stadler

University of Leipzig ( email )

Marschnerstrasse 31
D-04109 Leipzig, 04109
Germany

Diego Calvanese

Free University of Bozen-Bolzano ( email )

Sernesiplatz 1
Bozen-Bolzano, BZ 39100
Italy

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