メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.919348911218 35.4967181956136, 136.917072123939 35.4969082181014, 136.916777629634 35.4946952295383, 136.917377511431 35.4945458062508, 136.917903233295 35.4944148876177, 136.917921073465 35.4944099956467, 136.918399048804 35.4942788710275, 136.918892771209 35.4941434827672, 136.919348911218 35.4967181956136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral