メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.881786846391 43.0142591751226, 142.88127687822 43.0139458528687, 142.880621023623 43.0135412701783, 142.880683539565 43.0134879676639, 142.88158750383 43.0126901005573, 142.881796599289 43.0128278493595, 142.882520113462 43.0132556126637, 142.88276111309 43.0134014828764, 142.881838611519 43.0142135974332, 142.881786846391 43.0142591751226)) ^^http://www.opengis.net/ont/geosparql#wktLiteral