メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344490158164 43.0452292683847, 141.344206533024 43.0452152075768, 141.344131849792 43.0458919631038, 141.343558145783 43.0458719456015, 141.342975049282 43.0458515698867, 141.342969997204 43.0457975165218, 141.343062016828 43.0451424911894, 141.343141105717 43.0444603556177, 141.344579693969 43.0445529118022, 141.344490158164 43.0452292683847)) ^^http://www.opengis.net/ont/geosparql#wktLiteral