メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.046975933566 42.9206481462594, 143.04619342473 42.920588105507, 143.046325616739 42.9193724834399, 143.047143251373 42.9194117422136, 143.046975933566 42.9206481462594)) ^^http://www.opengis.net/ont/geosparql#wktLiteral