メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.0875000 24.3250000, 124.0937500 24.3250000, 124.0937500 24.3291667, 124.0875000 24.3291667, 124.0875000 24.3250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral