メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.266472056808 43.1100405019927, 141.265779572889 43.1094286774535, 141.266209132258 43.1091642743975, 141.266486422235 43.1091777666189, 141.266472565171 43.1094141618009, 141.266472056808 43.1100405019927)) ^^http://www.opengis.net/ont/geosparql#wktLiteral