メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.248484180296 34.8245946302109, 137.247213554418 34.8249448417257, 137.245232450283 34.8254758326653, 137.244575039257 34.8239323732613, 137.246159409686 34.8228723515378, 137.247292928873 34.8221725317052, 137.247703664303 34.8229723768845, 137.248484180296 34.8245946302109)) ^^http://www.opengis.net/ont/geosparql#wktLiteral