メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.463079479781 43.0400925637082, 144.462469925063 43.040114487442, 144.462525099472 43.040054485571, 144.463937391955 43.0385853751263, 144.464787869651 43.0400309310975, 144.463079479781 43.0400925637082)) ^^http://www.opengis.net/ont/geosparql#wktLiteral