メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.409145596865 43.732598419703, 142.409181593073 43.7330240042493, 142.407248371203 43.7331331419356, 142.40580787605 43.7332142683994, 142.405785041017 43.7327774663781, 142.405145230161 43.7328095813162, 142.40510440494 43.7328150158721, 142.40507760759 43.7325000492557, 142.405073498593 43.7323438897241, 142.405721425598 43.7323072629942, 142.407143188228 43.7322239835628, 142.40907002572 43.7321188478477, 142.409145596865 43.732598419703)) ^^http://www.opengis.net/ont/geosparql#wktLiteral