メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.973200933461 43.5595970570777, 144.973156723429 43.5595687532448, 144.972730781237 43.559283604374, 144.972668549145 43.5592415951422, 144.974136230381 43.5580293056829, 144.974666773308 43.5583782989795, 144.974717447734 43.5584127782616, 144.97396452578 43.5589686664685, 144.973200933461 43.5595970570777)) ^^http://www.opengis.net/ont/geosparql#wktLiteral