メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.2875000 24.5125000, 124.2937500 24.5125000, 124.2937500 24.5166667, 124.2875000 24.5166667, 124.2875000 24.5125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral