メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.017524342311 34.7818082011325, 138.016850151734 34.7817121268121, 138.016766349945 34.7815093709639, 138.016727687664 34.7814121620013, 138.016721533994 34.7813474807173, 138.01679817674 34.7810915548205, 138.01693194361 34.7809210775806, 138.017594607755 34.7809500533635, 138.017583055734 34.7812944206669, 138.017524342311 34.7818082011325)) ^^http://www.opengis.net/ont/geosparql#wktLiteral