メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.903629937174 43.4672024141873, 141.903814729172 43.4678356059174, 141.903515623437 43.4678823148363, 141.902864814168 43.4679839042314, 141.902811147309 43.4677877492588, 141.902678554405 43.4673303118847, 141.902414297796 43.4664183954654, 141.902361636349 43.4662367635695, 141.902419053988 43.466216965536, 141.903301786395 43.4660781026301, 141.903629937174 43.4672024141873)) ^^http://www.opengis.net/ont/geosparql#wktLiteral