メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.752304488447 42.8975350913631, 140.750814196953 42.8975898477574, 140.750846302699 42.8978481735251, 140.750848927043 42.897866212699, 140.750088291741 42.8978990070047, 140.750070573169 42.8976195593669, 140.749998100451 42.896942867632, 140.749951157482 42.8965469916514, 140.74994907863 42.8965064536513, 140.750721529001 42.8964826757725, 140.751459409767 42.8964327687502, 140.752207489812 42.8964000805396, 140.752304488447 42.8975350913631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral