メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.5562500 35.9333333, 140.5625000 35.9333333, 140.5625000 35.9375000, 140.5562500 35.9375000, 140.5562500 35.9333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral