メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.769385311081 35.4485152439204, 136.76934367947 35.4482832138918, 136.769305061199 35.4480683775882, 136.772179156514 35.4477091351666, 136.772159252669 35.4481648662627, 136.769385311081 35.4485152439204)) ^^http://www.opengis.net/ont/geosparql#wktLiteral