メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.395409222358 44.1824299286388, 142.394315365708 44.182258365754, 142.393512995104 44.1821231847023, 142.393781047006 44.1811846729733, 142.395289602307 44.1814335392788, 142.395680693657 44.1814980688498, 142.395409222358 44.1824299286388)) ^^http://www.opengis.net/ont/geosparql#wktLiteral