メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.421519073492 43.7621859038038, 142.42087817354 43.7622248622784, 142.420213914623 43.7622511760367, 142.420171677629 43.7617486103704, 142.420123682748 43.7612629646895, 142.420782059119 43.7612282032141, 142.421434674618 43.7612103434962, 142.421474834954 43.7616746037235, 142.421519073492 43.7621859038038)) ^^http://www.opengis.net/ont/geosparql#wktLiteral