メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.421245782041 43.0093594896543, 144.421314352808 43.0094942027842, 144.421478072598 43.0098323964107, 144.421649541473 43.0102271982203, 144.421080455044 43.0103669076518, 144.420580641984 43.0104928494478, 144.420169481071 43.0096051603947, 144.419797670594 43.0088004138341, 144.42033391216 43.0086697769147, 144.420885868027 43.0085065594233, 144.421150758877 43.0091214749488, 144.421245782041 43.0093594896543)) ^^http://www.opengis.net/ont/geosparql#wktLiteral