メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7000000 33.5750000, 130.7062500 33.5750000, 130.7062500 33.5791667, 130.7000000 33.5791667, 130.7000000 33.5750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral