メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.601569734013 43.3025984999544, 144.600840947315 43.3027814231944, 144.600121192618 43.3029640156436, 144.599959660992 43.3026105157167, 144.599514477323 43.3015729744924, 144.600932478553 43.3012452246113, 144.601569734013 43.3025984999544)) ^^http://www.opengis.net/ont/geosparql#wktLiteral