メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.9937500 34.2458334, 134.0000000 34.2458334, 134.0000000 34.2500000, 133.9937500 34.2500000, 133.9937500 34.2458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral