Sorry a question for me important. I've to populate field "id" wit more 500 number, from 0 to 500. I don't remeber the function in ' Calculate'. Thanks. Federico Lazzaroni -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20150107/186a9da2/attachment.html>