メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.995176775315 37.7247361886057, 138.993818981243 37.7248108623067, 138.993846681491 37.7238804125196, 138.993867918931 37.7237751531773, 138.994128103257 37.7237345026249, 138.994704436946 37.7237409601481, 138.995344700659 37.7237257468414, 138.995260341871 37.7240341459798, 138.995176775315 37.7247361886057)) ^^http://www.opengis.net/ont/geosparql#wktLiteral