メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9500000 32.9875000, 132.9562500 32.9875000, 132.9562500 32.9916667, 132.9500000 32.9916667, 132.9500000 32.9875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral