メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.1875000 24.3458334, 124.1937500 24.3458334, 124.1937500 24.3500000, 124.1875000 24.3500000, 124.1875000 24.3458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral