メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.162986979287 35.1058727739413, 137.161310434727 35.1058735983218, 137.16068865863 35.1049009081511, 137.161427276528 35.1048991652711, 137.161437004225 35.1046714732815, 137.162561435203 35.1046101499308, 137.163594095236 35.1045986078498, 137.163652729517 35.1058635490581, 137.162986979287 35.1058727739413)) ^^http://www.opengis.net/ont/geosparql#wktLiteral