メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.975974590562 34.8640047826602, 136.974897455103 34.8642286642337, 136.974352171197 34.8633763017153, 136.975349118055 34.8631106747392, 136.975974590562 34.8640047826602)) ^^http://www.opengis.net/ont/geosparql#wktLiteral