メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.836750796427 43.0798584287087, 142.837226506595 43.079965347999, 142.83732910151 43.0799883812145, 142.836907260294 43.0810267938021, 142.836307594064 43.0808914640367, 142.835611967567 43.0807344694362, 142.835934772463 43.079978663236, 142.836056245811 43.0797023455666, 142.836750796427 43.0798584287087)) ^^http://www.opengis.net/ont/geosparql#wktLiteral