メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.464360283034 43.037059036367, 144.462249002363 43.0374691936825, 144.461220229707 43.0352160551402, 144.461997548241 43.0350567079748, 144.463352076086 43.0347825917236, 144.463723967659 43.0356224111018, 144.464360283034 43.037059036367)) ^^http://www.opengis.net/ont/geosparql#wktLiteral