メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.936937034111 42.9444310932849, 142.935812790655 42.9451031597863, 142.935755802346 42.9451351496128, 142.935152283329 42.9445958027747, 142.934820268336 42.9442973324082, 142.934872059426 42.9442669918372, 142.935456264781 42.9439174701637, 142.935997046935 42.9435935950033, 142.936260877225 42.9438425345375, 142.936937034111 42.9444310932849)) ^^http://www.opengis.net/ont/geosparql#wktLiteral