メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.391147986189 43.0878378322562, 141.391439333912 43.0882133876462, 141.391757143707 43.0886044708801, 141.3901166066 43.0892817711016, 141.389488703957 43.0895528698603, 141.389203802382 43.0892519050643, 141.389038147708 43.0890763164207, 141.38888490031 43.0889193171032, 141.388400090601 43.0884434170791, 141.389144582403 43.0881577302744, 141.389910017393 43.0878492004326, 141.390879053656 43.0874585060396, 141.391147986189 43.0878378322562)) ^^http://www.opengis.net/ont/geosparql#wktLiteral