メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.1937500 33.8458334, 133.2000000 33.8458334, 133.2000000 33.8500000, 133.1937500 33.8500000, 133.1937500 33.8458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral