メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3375000 32.0750000, 130.3437500 32.0750000, 130.3437500 32.0791667, 130.3375000 32.0791667, 130.3375000 32.0750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral