メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.976955527891 43.5513933274832, 144.976927286482 43.5513717103707, 144.976282749355 43.5508779189949, 144.975826544633 43.5512365309016, 144.975482547842 43.5509580160446, 144.976606868902 43.5500777634468, 144.97679430127 43.5502162827667, 144.977363680617 43.5506472078459, 144.977497997375 43.5507441343557, 144.977658458857 43.5508676493363, 144.976955527891 43.5513933274832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral