メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.908897751735 43.4846987333392, 141.908078227808 43.484827417188, 141.907694582192 43.4835802639786, 141.90851671443 43.4834477901458, 141.908897751735 43.4846987333392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral