メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((126.7375000 26.3583333, 126.7437500 26.3583333, 126.7437500 26.3625000, 126.7375000 26.3625000, 126.7375000 26.3583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral