メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.045323982465 43.5579398641553, 142.044650365373 43.5579223520262, 142.044620300262 43.5574549277326, 142.046396665874 43.5572160261186, 142.047756627895 43.5570501508525, 142.047634435063 43.5579045402151, 142.047567659619 43.5584039997195, 142.046765201199 43.5583500125112, 142.046553430797 43.5578947150352, 142.045815743628 43.5579302218938, 142.045323982465 43.5579398641553)) ^^http://www.opengis.net/ont/geosparql#wktLiteral