メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.5687500 33.6625000, 135.5750000 33.6625000, 135.5750000 33.6666667, 135.5687500 33.6666667, 135.5687500 33.6625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral