メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.988772693284 34.9076561929923, 136.986036321141 34.9070585962081, 136.986133109357 34.9067280066718, 136.986204652929 34.906675361258, 136.98685614331 34.9066651974191, 136.988403282311 34.906503090437, 136.988772693284 34.9076561929923)) ^^http://www.opengis.net/ont/geosparql#wktLiteral