メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376288286915 43.821022100123, 142.375280036322 43.8202696478967, 142.376724735137 43.8192592707671, 142.377743103373 43.8185419822522, 142.378564714131 43.8191350486411, 142.378691016868 43.8192303168317, 142.377038492976 43.8204561277964, 142.376288286915 43.821022100123)) ^^http://www.opengis.net/ont/geosparql#wktLiteral