メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9312500 32.9833333, 132.9375000 32.9833333, 132.9375000 32.9875000, 132.9312500 32.9875000, 132.9312500 32.9833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral