メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.0000000 35.0916667, 139.0062500 35.0916667, 139.0062500 35.0958334, 139.0000000 35.0958334, 139.0000000 35.0916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral