メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.711750002905 44.3696066557181, 141.71124919826 44.3699375406268, 141.71070453128 44.3703100879441, 141.709612558327 44.3694476955695, 141.709650327262 44.3694231945313, 141.710176175952 44.3690823103732, 141.710688854012 44.3687497983955, 141.711750002905 44.3696066557181)) ^^http://www.opengis.net/ont/geosparql#wktLiteral