メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.38179738525 34.9676539629477, 138.382308015703 34.9681431451041, 138.381799801091 34.9683658404212, 138.38109754914 34.9686744784558, 138.381056724665 34.9686919048541, 138.380630533179 34.9688746019166, 138.380453322215 34.9689509839673, 138.380218456096 34.9690578043786, 138.379802925742 34.9692467065803, 138.379162554478 34.9682997518877, 138.379568606186 34.9681185889382, 138.379581760529 34.968111840835, 138.379972974352 34.9679243247338, 138.37998673924 34.9679163800382, 138.380181183079 34.9678278312955, 138.380434892129 34.9677119443871, 138.381403313644 34.9672495439775, 138.38179738525 34.9676539629477)) ^^http://www.opengis.net/ont/geosparql#wktLiteral