メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7875000 33.7458334, 132.7937500 33.7458334, 132.7937500 33.7500000, 132.7875000 33.7500000, 132.7875000 33.7458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral