メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.347542259857 43.7636865134726, 142.346651162023 43.7639974497661, 142.345985826556 43.7642435620093, 142.345458562955 43.7634836808802, 142.345248303172 43.7631522069826, 142.345757883879 43.7627541614999, 142.345778355208 43.7627381284501, 142.346217708235 43.7624318933365, 142.346705669224 43.7627847338838, 142.34712834404 43.763193621621, 142.347542259857 43.7636865134726)) ^^http://www.opengis.net/ont/geosparql#wktLiteral