メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.419126659419 43.0814180970849, 141.418543101268 43.0810212844863, 141.418478859571 43.07966276597, 141.419318490386 43.0802081433479, 141.419315859306 43.0802181814114, 141.419421141982 43.0802728164918, 141.419418408485 43.08028334623, 141.419126659419 43.0814180970849)) ^^http://www.opengis.net/ont/geosparql#wktLiteral