メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0875000 35.0625000, 134.0937500 35.0625000, 134.0937500 35.0666667, 134.0875000 35.0666667, 134.0875000 35.0625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral