メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.85807340142 37.4862322607683, 138.858102855387 37.4862259742364, 138.858254184077 37.4866739378428, 138.8583972046 37.4870977078221, 138.858467427234 37.487305725646, 138.857892706734 37.4883963411756, 138.857324973618 37.4882013714179, 138.856785402311 37.4880160274662, 138.856778431866 37.4880366035333, 138.855901836459 37.4877010608785, 138.855939587778 37.4871393321183, 138.855971099957 37.4866830736189, 138.856031665732 37.4861964556468, 138.857944776973 37.4857832450627, 138.85807340142 37.4862322607683)) ^^http://www.opengis.net/ont/geosparql#wktLiteral