メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.404175758076 43.0661673318972, 141.404188615569 43.0661740381302, 141.404767495113 43.0664891722814, 141.405055386659 43.0666408182248, 141.405064830278 43.0666307604265, 141.40542918719 43.0668094849464, 141.404715175273 43.0675122261961, 141.40409804733 43.0671945586103, 141.403498527564 43.0668734314288, 141.402818240397 43.0665179450809, 141.403528778275 43.0658314371198, 141.404175758076 43.0661673318972)) ^^http://www.opengis.net/ont/geosparql#wktLiteral