メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.3375000 33.3875000, 132.3437500 33.3875000, 132.3437500 33.3916667, 132.3375000 33.3916667, 132.3375000 33.3875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral