メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.988818053199 34.8834483789004, 136.987668309404 34.8837110019825, 136.987495845624 34.8832037244638, 136.987191597085 34.8822335294632, 136.988291380224 34.8819642878118, 136.988446956012 34.8823729381227, 136.988769741655 34.8832954760663, 136.988818053199 34.8834483789004)) ^^http://www.opengis.net/ont/geosparql#wktLiteral