メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908887760159 43.531964039962, 141.907428163947 43.5333133004714, 141.906780030354 43.5339816121432, 141.905967180846 43.5323117117934, 141.905447773733 43.5312245507861, 141.90466286705 43.5296245876777, 141.904530220712 43.529365673471, 141.905123984444 43.5296905405461, 141.906012953356 43.5301769158275, 141.908887760159 43.531964039962)) ^^http://www.opengis.net/ont/geosparql#wktLiteral