メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2750000 24.8708334, 125.2812500 24.8708334, 125.2812500 24.8750000, 125.2750000 24.8750000, 125.2750000 24.8708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral