メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.41953938306 43.0116953662748, 144.41915804459 43.010832564627, 144.420019293427 43.0106184782553, 144.420517235483 43.0105046713808, 144.420886754723 43.0113579157101, 144.41953938306 43.0116953662748)) ^^http://www.opengis.net/ont/geosparql#wktLiteral