Semantics-based automatic composition of geospatial Web service chains
Computers & Geosciences
Exploiting semantics of web services for geospatial data fusion
Proceedings of the 1st ACM SIGSPATIAL International Workshop on Spatial Semantics and Ontologies
Semi-automatically mapping structured sources into the semantic web
ESWC'12 Proceedings of the 9th international conference on The Semantic Web: research and applications
Rapidly integrating services into the linked data cloud
ISWC'12 Proceedings of the 11th international conference on The Semantic Web - Volume Part I
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There is a tremendous amount of geospatial data available, and there are numerous methods for extracting, processing and integrating geospatial sources. However, end-users' ability to retrieve, combine, and integrate heterogeneous geospatial data is limited. This paper presents a new semantic approach that allows users to easily extract, link, and integrate geospatial data from various sources by demonstration in an interactive interface, which is implemented in a tool called Karma. First, we encapsulate the retrieval algorithms as web services and invoke the services to extract geospatial data from various sources. Then we model and publish the extracted geospatial data to RDF for eliminating the data heterogeneity. Finally, we link the geospatial data (in RDF) from different sources using a semantic matching algorithm and integrate them using SPARQL queries. This approach empowers end users to rapidly extract geospatial data from diverse sources, to easily eliminate heterogeneity and to semantically link and integrate sources.