メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.18742255662 34.810484040165, 137.186270576018 34.8104860645369, 137.185874991291 34.8104826073249, 137.185858731609 34.8091728032196, 137.186043337774 34.808651047845, 137.186119131999 34.8087337173198, 137.18742255662 34.810484040165)) ^^http://www.opengis.net/ont/geosparql#wktLiteral