メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.341512135637 43.0569280023398, 141.341376670732 43.057495892126, 141.341231815601 43.0580629337295, 141.33982332205 43.0578854013619, 141.33995619245 43.0573513917318, 141.340116503715 43.0567321496724, 141.341512135637 43.0569280023398)) ^^http://www.opengis.net/ont/geosparql#wktLiteral