メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.243163364791 34.8194594009526, 137.242671476469 34.8195498733839, 137.242616489874 34.8191554954648, 137.242602602226 34.8188850494249, 137.242670586686 34.8184680534953, 137.243107953447 34.8185579191503, 137.243163364791 34.8194594009526)) ^^http://www.opengis.net/ont/geosparql#wktLiteral