メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.0875000 31.8166667, 131.0937500 31.8166667, 131.0937500 31.8208334, 131.0875000 31.8208334, 131.0875000 31.8166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral