Mapa coroplètic d'esclavisme a USA 1860 http://www.bigmapblog.com/2012/choropleth-map-of-u-s-slavery-1860/ Raf -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osgeo.org/pipermail/barcelona/attachments/20120620/5c28d411/attachment.html>