メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.008060654866 43.5659229803423, 145.007297122789 43.5654373339489, 145.007105157561 43.5653123345514, 145.007224714233 43.5652155731752, 145.00768120187 43.5648565117056, 145.008248451553 43.5644243137402, 145.009171436285 43.5650430460917, 145.008150640674 43.5658563249859, 145.008060654866 43.5659229803423)) ^^http://www.opengis.net/ont/geosparql#wktLiteral