メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.977890420834 34.9753940189295, 134.97808390099 34.9755831462971, 134.977566188101 34.976097475822, 134.977384257516 34.9758538467481, 134.97725712935 34.975691974107, 134.977585519372 34.9753822555747, 134.977890420834 34.9753940189295)) ^^http://www.opengis.net/ont/geosparql#wktLiteral