メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.6562500 33.8916667, 134.6625000 33.8916667, 134.6625000 33.8958334, 134.6562500 33.8958334, 134.6562500 33.8916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral