メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.370374986854 43.8273683033086, 142.369512844305 43.8279695662206, 142.368156478939 43.8270501648646, 142.368594128041 43.8270004219817, 142.368447228584 43.8265005512478, 142.368940520664 43.8263116564493, 142.370822530449 43.8249734282924, 142.371046064459 43.8251135393948, 142.372429387223 43.8259013364, 142.370374986854 43.8273683033086)) ^^http://www.opengis.net/ont/geosparql#wktLiteral