メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.8437500 33.8333333, 132.8500000 33.8333333, 132.8500000 33.8375000, 132.8437500 33.8375000, 132.8437500 33.8333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral