メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.941633582409 33.6286398002007, 135.941634808781 33.6283366128732, 135.941635814241 33.6280894981128, 135.943146918273 33.6271079368771, 135.943364057307 33.6273300729907, 135.943474325502 33.6274687554496, 135.94247191561 33.6281211647262, 135.941633582409 33.6286398002007)) ^^http://www.opengis.net/ont/geosparql#wktLiteral