メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.671609537927 33.2477154912893, 131.673114472876 33.2481035869403, 131.673055119879 33.2485027429816, 131.672938141345 33.2503505422708, 131.669446100286 33.2502328569799, 131.669502388717 33.249836361956, 131.669550470208 33.2495894508002, 131.669639424964 33.2489697451157, 131.669759967625 33.2484023523439, 131.669864817504 33.2478166917644, 131.670063787482 33.2472934727075, 131.671609537927 33.2477154912893)) ^^http://www.opengis.net/ont/geosparql#wktLiteral