メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.973811067623 43.5600039985125, 144.973605247261 43.5598571236333, 144.973221048576 43.5596100084713, 144.973200933461 43.5595970570777, 144.97396452578 43.5589686664685, 144.974717447734 43.5584127782616, 144.975069401887 43.5586524659886, 144.975332357658 43.5588226912383, 144.973811067623 43.5600039985125)) ^^http://www.opengis.net/ont/geosparql#wktLiteral