メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.400938525034 43.0023689246188, 144.401355615936 43.0027885445829, 144.399941438151 43.0035321144522, 144.399603204966 43.003065645367, 144.398964555257 43.0022878435682, 144.399528674629 43.0020010008474, 144.400292004845 43.0016734210186, 144.400938525034 43.0023689246188)) ^^http://www.opengis.net/ont/geosparql#wktLiteral