メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.398620552894 43.0941440707468, 141.399325745673 43.0950648278947, 141.3987550035 43.0952940661803, 141.39742670422 43.0958456595178, 141.397031299797 43.0960187384471, 141.396523735108 43.0953397485944, 141.396313344709 43.0950582804982, 141.395651031532 43.0941847363892, 141.396045735603 43.0940192516304, 141.395887425847 43.0938026591295, 141.396310439313 43.0936368921769, 141.397214834922 43.0932634496171, 141.397762500884 43.0930500086365, 141.398620552894 43.0941440707468)) ^^http://www.opengis.net/ont/geosparql#wktLiteral