メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.120070441606 43.5409539037636, 142.120046198155 43.5411069705288, 142.118942257265 43.5410451083737, 142.11638615066 43.5409159232681, 142.116450148955 43.5405180323292, 142.1165780641 43.5397682083329, 142.117890194122 43.5398711212695, 142.120211771485 43.5400619681886, 142.120070441606 43.5409539037636)) ^^http://www.opengis.net/ont/geosparql#wktLiteral