Just add Deflate or LZW compression to your tif (both are loseless, JPG is not). The output files will be 10%-50% the size of the original in most cases.
See the following post for a comparison of settings. http://linfiniti.com/2011/05/gdal-efficiency-of-various-compression-algorithms/ Enjoy, Alex On 05/02/2015 07:36 AM, Nicolas Cadieux wrote: > Hi, > > I will be making huge... (No HUGE) DEMs file in QGIS. I usually use .tif > or.tiff (not really sure what the real difference is) but they are large > files. > > What would be the best Qgis raster format permitting both smaller disk > storage, lossless compression and ease of analysis using the various Qgis > plugins? Formats need to accept floats. I only use one band. > > Thanks for the help. > > Nicolas Cadieux M.Sc. > Les Entreprises Archéotec inc. > 8548, rue Saint-Denis Montréal H2P 2H2 > Téléphone: 514.381.5112 Fax: 514.381.4995 > www.archeotec.ca > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user