メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.984168068967 43.5501331236574, 144.984131171507 43.5501637517702, 144.983890567765 43.5503546947818, 144.983098220744 43.5497959540743, 144.984192247216 43.5488815768697, 144.984645116052 43.5491811216471, 144.985009427927 43.5494336328429, 144.984168068967 43.5501331236574)) ^^http://www.opengis.net/ont/geosparql#wktLiteral