メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9875000 33.9916667, 130.9937500 33.9916667, 130.9937500 33.9958334, 130.9875000 33.9958334, 130.9875000 33.9916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral