メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.343756892652 44.4859348055181, 142.343618753337 44.4862198961204, 142.34352725534 44.4864087241411, 142.343282436605 44.4869139782295, 142.340683474102 44.4862691169171, 142.341026390275 44.4855809785951, 142.341345515252 44.4849405622793, 142.341504451912 44.4848029386908, 142.343972388759 44.4854472229893, 142.343756892652 44.4859348055181)) ^^http://www.opengis.net/ont/geosparql#wktLiteral