メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.6729231113 33.2516467904537, 131.672877514591 33.2526204888563, 131.672776791905 33.2537361510022, 131.669873099133 33.2533975527182, 131.668910372402 33.2532767702995, 131.669107837074 33.2521474481992, 131.669281716046 33.2511966962012, 131.669446100286 33.2502328569799, 131.672938141345 33.2503505422708, 131.6729231113 33.2516467904537)) ^^http://www.opengis.net/ont/geosparql#wktLiteral