メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6937500 32.9166667, 132.7000000 32.9166667, 132.7000000 32.9208334, 132.6937500 32.9208334, 132.6937500 32.9166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral