メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.4625000 33.4583333, 132.4687500 33.4583333, 132.4687500 33.4625000, 132.4625000 33.4625000, 132.4625000 33.4583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral