メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7312500 34.2458334, 132.7375000 34.2458334, 132.7375000 34.2500000, 132.7312500 34.2500000, 132.7312500 34.2458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral