メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.7064867185 44.3605240951754, 141.705230714304 44.3613400825384, 141.704276384379 44.36059028146, 141.704167641003 44.3605007058868, 141.705369365698 44.3597301747924, 141.705470127152 44.3596655800277, 141.7064867185 44.3605240951754)) ^^http://www.opengis.net/ont/geosparql#wktLiteral