メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.427631073499 43.7593674656916, 142.427674320161 43.7598663180259, 142.426907060728 43.759910654752, 142.425520008205 43.7599908085617, 142.424822734244 43.760031086814, 142.424729331769 43.7589816551724, 142.425419120064 43.7589537468021, 142.425973283557 43.7589313326964, 142.426546127124 43.758898518278, 142.426810078563 43.7588833972534, 142.42758526543 43.7588389770998, 142.427631073499 43.7593674656916)) ^^http://www.opengis.net/ont/geosparql#wktLiteral