メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.505722735109 40.6015976492986, 140.507062434924 40.6016996865814, 140.50690844342 40.6028927057221, 140.506717188009 40.6041653904207, 140.505991735899 40.6041153420498, 140.50455135331 40.6040073073565, 140.504615323707 40.6034753603157, 140.50466723904 40.6030437098505, 140.504915942842 40.6015144999577, 140.505722735109 40.6015976492986)) ^^http://www.opengis.net/ont/geosparql#wktLiteral