メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351160652162 43.0312175242093, 141.352071931983 43.0312854447299, 141.351967221608 43.0313856880754, 141.351828131792 43.0326210041885, 141.35096306472 43.0325580861776, 141.350169018357 43.0324965646356, 141.350211206571 43.032187653478, 141.350253834925 43.0318485745779, 141.350346705806 43.0311609818059, 141.351160652162 43.0312175242093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral