メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.1375000 24.3833333, 124.1437500 24.3833333, 124.1437500 24.3875000, 124.1375000 24.3875000, 124.1375000 24.3833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral