メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.054636052404 42.9148593866274, 143.053906533308 42.9148001533088, 143.054018024458 42.9140067960939, 143.054092342754 42.9134158352098, 143.054779084202 42.9134684750785, 143.054855708028 42.9134743367622, 143.054636052404 42.9148593866274)) ^^http://www.opengis.net/ont/geosparql#wktLiteral