メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.304545388924 43.0155968128957, 144.306538428683 43.0158320885235, 144.306855814176 43.0158770955457, 144.306423572744 43.0173918286045, 144.304105339713 43.0170917051252, 144.302856706851 43.0169355995932, 144.302139289991 43.0153150324289, 144.303122456338 43.0154320212986, 144.304545388924 43.0155968128957)) ^^http://www.opengis.net/ont/geosparql#wktLiteral