メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.128398284121 34.6533991981619, 135.127976902084 34.6538256475587, 135.127698805985 34.6541204452631, 135.126777516222 34.6536058420469, 135.127099011211 34.6532859726487, 135.127550502212 34.6528705981069, 135.128398284121 34.6533991981619)) ^^http://www.opengis.net/ont/geosparql#wktLiteral