メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.340297920169 38.8892861559258, 141.339106072866 38.8886220080111, 141.338309431425 38.8881281490271, 141.337863289019 38.8878515119999, 141.337782022452 38.8877888023794, 141.33876150409 38.8875901808029, 141.33907402291 38.8875769346014, 141.339295518601 38.8876296050891, 141.339555615501 38.8877475619411, 141.339808696031 38.8879488775154, 141.339993030539 38.8881385271276, 141.340233564639 38.8884491959517, 141.340434198348 38.8889041060103, 141.340297920169 38.8892861559258)) ^^http://www.opengis.net/ont/geosparql#wktLiteral