メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343098763008 43.1420568871048, 141.343576409344 43.1441110773616, 141.341969196183 43.1443000127641, 141.341549664828 43.144352535438, 141.340819334162 43.1444438087987, 141.340653435907 43.1436868862547, 141.340364752652 43.1423755063289, 141.340056677663 43.1409866079884, 141.34118313337 43.1408495310537, 141.342769021459 43.1406416677286, 141.342905501002 43.1412133195889, 141.342996574247 43.1416212400955, 141.343098763008 43.1420568871048)) ^^http://www.opengis.net/ont/geosparql#wktLiteral