メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348391376581 43.0688357984553, 141.348227479246 43.0694348382891, 141.3480911501 43.0699722749561, 141.347409050977 43.0698798889228, 141.347107617837 43.0698390601231, 141.346539043148 43.069762045253, 141.346652733551 43.0692124059187, 141.346664079029 43.0691845744611, 141.346797148591 43.068628053345, 141.348391376581 43.0688357984553)) ^^http://www.opengis.net/ont/geosparql#wktLiteral