メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.738975641134 35.4068447963735, 136.739763610382 35.4069230699148, 136.739880906134 35.4069440469962, 136.739807291005 35.4077913014014, 136.738876562906 35.407739987479, 136.737761397917 35.4076776603549, 136.737742030794 35.4065831123824, 136.738099890507 35.4067113494661, 136.738271570302 35.4067599840962, 136.738422426281 35.4067777002769, 136.738975641134 35.4068447963735)) ^^http://www.opengis.net/ont/geosparql#wktLiteral