メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.5562500 34.5541667, 135.5625000 34.5541667, 135.5625000 34.5583333, 135.5562500 34.5583333, 135.5562500 34.5541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral