メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.396764494988 43.7851171653753, 142.396946358175 43.7852424946091, 142.397264615863 43.7854543400268, 142.397630314772 43.7856706065867, 142.398306768449 43.7860928520987, 142.398031207309 43.7863405646727, 142.396844184432 43.7873233055204, 142.39635235022 43.7870010612725, 142.395804816159 43.7866773914106, 142.395310627806 43.786340096679, 142.394237826597 43.7856617553883, 142.395304238985 43.7852983839188, 142.396419421632 43.784897863479, 142.396764494988 43.7851171653753)) ^^http://www.opengis.net/ont/geosparql#wktLiteral