メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2437500 24.7125000, 125.2500000 24.7125000, 125.2500000 24.7166667, 125.2437500 24.7166667, 125.2437500 24.7125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral