メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5437500 34.4458334, 132.5500000 34.4458334, 132.5500000 34.4500000, 132.5437500 34.4500000, 132.5437500 34.4458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral