メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.924684470611 43.5327559640842, 141.925064562983 43.5340497818413, 141.924995170923 43.5340616819025, 141.924487075507 43.5341488173025, 141.923957065388 43.5342397211046, 141.923909792769 43.5342498901458, 141.923059705583 43.5344324637503, 141.92266601198 43.5331902198023, 141.922622251503 43.5330521527583, 141.92379224628 43.531838161182, 141.924261911868 43.5313508069152, 141.924684470611 43.5327559640842)) ^^http://www.opengis.net/ont/geosparql#wktLiteral