メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.012411499511 43.5697696418748, 145.011376859067 43.5705812467216, 145.010850364791 43.5702475135538, 145.011032748269 43.5700864693681, 145.011374978163 43.5697960074097, 145.011960373869 43.5692991851208, 145.012411499511 43.5697696418748)) ^^http://www.opengis.net/ont/geosparql#wktLiteral