メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.046765201199 43.5583500125112, 142.047567659619 43.5584039997195, 142.047544956277 43.5585447117332, 142.047234556113 43.5604685983424, 142.046087533023 43.5603265177062, 142.045621797772 43.5602103291733, 142.04522959091 43.5600872712935, 142.044716398364 43.5599262342681, 142.044650365373 43.5579223520262, 142.045323982465 43.5579398641553, 142.045815743628 43.5579302218938, 142.046553430797 43.5578947150352, 142.046765201199 43.5583500125112)) ^^http://www.opengis.net/ont/geosparql#wktLiteral