メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.264829367117 44.0200055340897, 144.263250920331 44.019842670766, 144.263364783331 44.019262904644, 144.264945063642 44.0194285766644, 144.264829367117 44.0200055340897)) ^^http://www.opengis.net/ont/geosparql#wktLiteral