メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.76645797201 42.9020516318594, 140.766553135198 42.9032862632555, 140.764251225978 42.9034029224607, 140.764182124191 42.9026708657957, 140.764129852625 42.9021381277841, 140.764018502341 42.9008735157054, 140.764209390826 42.9008643228603, 140.764267817573 42.9008614960377, 140.766340612639 42.9007682331778, 140.76645797201 42.9020516318594)) ^^http://www.opengis.net/ont/geosparql#wktLiteral