メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.811911205272 34.0540905751264, 131.811465837271 34.054272699782, 131.810790050335 34.0530184630895, 131.811115924826 34.0528575450003, 131.811252630806 34.0530820818513, 131.811871762657 34.0540155133288, 131.811911205272 34.0540905751264)) ^^http://www.opengis.net/ont/geosparql#wktLiteral