メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.0562500 33.9166667, 136.0625000 33.9166667, 136.0625000 33.9208334, 136.0562500 33.9208334, 136.0562500 33.9166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral