メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5937500 33.2833333, 132.6000000 33.2833333, 132.6000000 33.2875000, 132.5937500 33.2875000, 132.5937500 33.2833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral