メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((126.7437500 26.3666667, 126.7500000 26.3666667, 126.7500000 26.3708334, 126.7437500 26.3708334, 126.7437500 26.3666667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral