メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.98428987093 43.5513031920997, 144.983425334892 43.5507434757782, 144.983890567765 43.5503546947818, 144.984131171507 43.5501637517702, 144.984168068967 43.5501331236574, 144.985008515536 43.5506861690908, 144.984970868195 43.5507173428753, 144.98428987093 43.5513031920997)) ^^http://www.opengis.net/ont/geosparql#wktLiteral