メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.421103231654 34.0984860595332, 131.422121602626 34.0985167269916, 131.422338066908 34.0986070645342, 131.422277672064 34.0990257882659, 131.42135396482 34.0989841437061, 131.421069337308 34.0989712951838, 131.421084116091 34.0987251427069, 131.421103231654 34.0984860595332)) ^^http://www.opengis.net/ont/geosparql#wktLiteral