メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6812500 34.6375000, 133.6875000 34.6375000, 133.6875000 34.6416667, 133.6812500 34.6416667, 133.6812500 34.6375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral