メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.914686625428 43.4996864744025, 141.914753027283 43.4996763317471, 141.914797847809 43.4997683797751, 141.915021576412 43.4997316231823, 141.915248708538 43.5005689297246, 141.914956203638 43.5006123064268, 141.913297651968 43.5008820865005, 141.913284476263 43.5006724040797, 141.913183176953 43.5003277166042, 141.913070833318 43.4999454769869, 141.914686625428 43.4996864744025)) ^^http://www.opengis.net/ont/geosparql#wktLiteral