メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.086414775475 37.8674662878499, 139.088729940201 37.8683031219083, 139.088379919524 37.8689510629452, 139.088044997827 37.8695278337901, 139.088015520685 37.8695840129602, 139.087179207758 37.8692856327649, 139.085685973244 37.868745546896, 139.085672659253 37.8687406862336, 139.083428708619 37.8679292024504, 139.084196561309 37.8666610310888, 139.084957848718 37.8669479765773, 139.086414775475 37.8674662878499)) ^^http://www.opengis.net/ont/geosparql#wktLiteral