メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.373087218058 43.085201674874, 141.373780105881 43.0852878574902, 141.37350041472 43.0864423386288, 141.372813470761 43.0863489578434, 141.372402596824 43.0862885622622, 141.372327536415 43.0862835561897, 141.371808755721 43.0862069297504, 141.371984404511 43.0855125874539, 141.372091256664 43.0850725852092, 141.373087218058 43.085201674874)) ^^http://www.opengis.net/ont/geosparql#wktLiteral