メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.3125000 24.6166667, 124.3187500 24.6166667, 124.3187500 24.6208334, 124.3125000 24.6208334, 124.3125000 24.6166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral