メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.332246043393 43.0654974136857, 141.333050944023 43.06559902846, 141.332904593752 43.0661438912785, 141.332759832112 43.0667299783446, 141.331994331696 43.0666225587946, 141.331217277274 43.0665118068626, 141.331360125687 43.0659328085693, 141.33150187787 43.0653949445341, 141.332246043393 43.0654974136857)) ^^http://www.opengis.net/ont/geosparql#wktLiteral