Hi Pierre, thank you. And when I have map like this, without any Scale factor, located in the same country, can I suppose that it's always nearby 1? http://legacy.lib.utexas.edu/maps/ams/italy_50k/txu-pclmaps-oclc-6540719-palermo-249-2.jpg Best regards -- Sent from: http://osgeo-org.1560.x6.nabble.com/PROJ-4-f3840930.html