|
GeoSPARQL is a standard for representation and querying of geospatial linked data for the Semantic Web from the Open Geospatial Consortium (OGC). The definition of a small ontology based on well-understood OGC standards is intended to provide a standardized exchange basis for geospatial RDF data which can support both qualitative and quantitative spatial reasoning and querying with the SPARQL database query language. The Ordnance Survey Linked Data Platform uses OWL mappings for GeoSPARQL equivalent properties in its vocabulary. The (LinkedGeoData ) data set is a work of the Agile Knowledge Engineering and Semantic Web (AKSW) research group at the University of Leipzig,〔(【引用サイトリンク】date=2012-05-18 )〕 a group mostly known for DBpedia, that uses the GeoSPARQL vocabulary to represent OpenStreetMap data. In particular, GeoSPARQL provides for: * a small topological ontology in RDFS/OWL for representation using * * Geography Markup Language (GML) and well-known text (WKT) literals, and * * Simple Features, RCC8, and DE-9IM (a.k.a. Egenhofer) topological relationship vocabularies and ontologies for qualitative reasoning, and * a SPARQL query interface using * * a set of topological SPARQL extension functions for quantitative reasoning, and * * a set of Rule Interchange Format (RIF) Core inference rules for query transformation and interpretation. ==Example== The following example SPARQL query could help model the question "What is within the bounding box defined by and ?" PREFIX geo: PREFIX geof: SELECT ?what WHERE 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「GeoSPARQL」の詳細全文を読む スポンサード リンク
|