メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.570125012572 43.3283407248773, 145.569551100163 43.3279768988022, 145.568984290826 43.3275947924939, 145.57008234169 43.3267958554065, 145.571199762718 43.3275666465707, 145.570125012572 43.3283407248773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral