メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.1937500 34.1833333, 132.2000000 34.1833333, 132.2000000 34.1875000, 132.1937500 34.1875000, 132.1937500 34.1833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral