メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.986244801125 43.5444005565244, 144.986796531386 43.5447575300307, 144.986048577488 43.5453274519046, 144.985493040603 43.5449590683645, 144.985337239513 43.5448317257607, 144.986038159908 43.5442691592646, 144.986244801125 43.5444005565244)) ^^http://www.opengis.net/ont/geosparql#wktLiteral