メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.756069403926 42.9047280833941, 140.756776799623 42.904680984572, 140.757530652804 42.904631532938, 140.75759826319 42.9054382004147, 140.757665603416 42.906256186529, 140.757667092467 42.9062658412154, 140.757647450289 42.9062670622549, 140.757079984616 42.9062993239494, 140.756415465118 42.9063332000135, 140.755415812117 42.9063702190712, 140.755328425713 42.9055239074519, 140.755308427271 42.9047634353968, 140.756069403926 42.9047280833941)) ^^http://www.opengis.net/ont/geosparql#wktLiteral