メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.380623289697 42.9742071218559, 144.379869799906 42.9752733907563, 144.379290816606 42.9761074209688, 144.379080261989 42.9760230117146, 144.378865567941 42.9757520313464, 144.378593933914 42.9755405523325, 144.379014933036 42.9749572284919, 144.379733905811 42.9738784575612, 144.380007456524 42.9735187032761, 144.380753683294 42.9734793418807, 144.381159480816 42.9734604567418, 144.380623289697 42.9742071218559)) ^^http://www.opengis.net/ont/geosparql#wktLiteral