メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9437500 33.0500000, 132.9500000 33.0500000, 132.9500000 33.0541667, 132.9437500 33.0541667, 132.9437500 33.0500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral