メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.367271355062 43.7391917732706, 142.366673944898 43.7390163913712, 142.366135649499 43.7388583659778, 142.366776950934 43.737696949102, 142.367315312284 43.7378504870251, 142.367634340879 43.7372973612826, 142.367954865984 43.7373911194695, 142.368255205242 43.7374789731785, 142.368016441977 43.7379382975236, 142.367271355062 43.7391917732706)) ^^http://www.opengis.net/ont/geosparql#wktLiteral