メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350052579858 43.7682361905791, 142.35037695944 43.7687903127222, 142.348841703865 43.7692525369592, 142.348525897297 43.7686722079021, 142.348597220833 43.768650609475, 142.348269466684 43.7680454155015, 142.348968423895 43.7678473592341, 142.348982338772 43.7678706940191, 142.349746103881 43.7676623625532, 142.350080318886 43.768228149572, 142.350052579858 43.7682361905791)) ^^http://www.opengis.net/ont/geosparql#wktLiteral