メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.357082083551 43.04904897358, 141.357729077091 43.0502808560282, 141.356327627061 43.0501161057245, 141.356475578153 43.0495489957993, 141.356542749145 43.0492948554899, 141.356603350521 43.0490638733686, 141.357082083551 43.04904897358)) ^^http://www.opengis.net/ont/geosparql#wktLiteral