メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5437500 34.8916667, 134.5500000 34.8916667, 134.5500000 34.8958334, 134.5437500 34.8958334, 134.5437500 34.8916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral