メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.883766630349 43.0125236360337, 142.882803428396 43.0133642559455, 142.88276111309 43.0134014828764, 142.882520113462 43.0132556126637, 142.881796599289 43.0128278493595, 142.88158750383 43.0126901005573, 142.881642828726 43.0126412688475, 142.882516532018 43.01188062425, 142.882946680169 43.011506137727, 142.884046927303 43.0121950545218, 142.884103681222 43.0122294836804, 142.883766630349 43.0125236360337)) ^^http://www.opengis.net/ont/geosparql#wktLiteral