メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.658108738296 42.8456651124488, 141.658350643452 42.846046230006, 141.65883972405 42.8467429415644, 141.659130336271 42.8471697451797, 141.657125484333 42.8478793591997, 141.656847092933 42.8474604921468, 141.656124818414 42.8464289040402, 141.655819402268 42.8459639673164, 141.655578031431 42.8455985312765, 141.657015271122 42.8450341902291, 141.657574281848 42.8448476832097, 141.658108738296 42.8456651124488)) ^^http://www.opengis.net/ont/geosparql#wktLiteral