メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.726237328117 45.3827853573239, 141.725286006574 45.3826064947665, 141.725383282556 45.3822797623505, 141.724839392588 45.3821931768208, 141.724263488726 45.38209463127, 141.722245022379 45.3817641647602, 141.722737118718 45.3802009816182, 141.722795476414 45.380211796201, 141.723973460472 45.3802525324635, 141.725881252405 45.3803160211237, 141.726366253341 45.3803335778703, 141.726237328117 45.3827853573239)) ^^http://www.opengis.net/ont/geosparql#wktLiteral