メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9500000 30.3750000, 130.9562500 30.3750000, 130.9562500 30.3791667, 130.9500000 30.3791667, 130.9500000 30.3750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral