メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.000234706928 34.8894655079329, 137.000000802036 34.8894270124317, 136.999832272342 34.8893729724413, 136.999644860349 34.8892736198905, 136.998216390662 34.8898299216764, 136.997964796995 34.888743276973, 136.998204936723 34.8884790820199, 136.998915802951 34.8877192330287, 136.999893443469 34.888308247285, 137.000021221694 34.8887062046595, 137.000169001119 34.8891205990929, 137.000234706928 34.8894655079329)) ^^http://www.opengis.net/ont/geosparql#wktLiteral