メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((126.7875000 26.3708334, 126.7937500 26.3708334, 126.7937500 26.3750000, 126.7875000 26.3750000, 126.7875000 26.3708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral