メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.349789012686 43.1057251176285, 141.349692414639 43.1061208698082, 141.347779611672 43.1058720197914, 141.347872825651 43.1054786309009, 141.347976348844 43.105049737209, 141.348477586759 43.1051130317808, 141.348920608524 43.1051734752211, 141.349376620812 43.1052316277174, 141.349889132056 43.1052985902591, 141.349789012686 43.1057251176285)) ^^http://www.opengis.net/ont/geosparql#wktLiteral