メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767401331397 43.1839405437986, 141.766128737448 43.184247348851, 141.765470135783 43.1843920364142, 141.76453624118 43.1846086934881, 141.764379316617 43.1841752277644, 141.764361412537 43.1841180458082, 141.764794509839 43.1840089078674, 141.765309121793 43.1838973702776, 141.765968359868 43.1837384103436, 141.767178255665 43.1834474480788, 141.767401331397 43.1839405437986)) ^^http://www.opengis.net/ont/geosparql#wktLiteral