メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.328306462559 43.755411802459, 142.328905094842 43.755608960505, 142.328261174866 43.7567130035093, 142.327944643083 43.7566246490589, 142.327631244558 43.7565385778649, 142.32744947125 43.7564978275953, 142.327505692117 43.7563660773041, 142.327511710992 43.7561707914813, 142.327514875003 43.7559553955023, 142.327411968797 43.7559381306238, 142.327817506161 43.7552676608236, 142.328306462559 43.755411802459)) ^^http://www.opengis.net/ont/geosparql#wktLiteral