メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.0958194959 39.3837773464537, 141.091682514276 39.3841139412946, 141.09182390193 39.3832577359543, 141.092146624625 39.3814931581169, 141.094216244807 39.3822696769885, 141.096250422398 39.3830320240719, 141.09617066692 39.3831762597538, 141.0958194959 39.3837773464537)) ^^http://www.opengis.net/ont/geosparql#wktLiteral