メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406629647662 44.1730322936163, 142.406101639771 44.1729452062278, 142.405596495559 44.1728618817638, 142.405251060194 44.1728013839203, 142.405195553708 44.172791668269, 142.405471437592 44.1717269859666, 142.405639204542 44.1710794967781, 142.405861291306 44.1702223714261, 142.40742539166 44.1705097836304, 142.406629647662 44.1730322936163)) ^^http://www.opengis.net/ont/geosparql#wktLiteral