try ERDAS ViewFinder http://gi.leica-geosystems.com/LGISub2x288x0.aspx . not open source but a free download - heard about through http://freegeographytools.com/ cheers* -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.maptools.org/pipermail/fwtools/attachments/20081003/1f9a909d/attachment.html