メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.5312500 34.4958334, 133.5375000 34.4958334, 133.5375000 34.5000000, 133.5312500 34.5000000, 133.5312500 34.4958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral