[Qgis-user] Raster file format

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 vario

Re: [Qgis-user] Raster file format

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, Ale

Re: [Qgis-user] Raster file format

Thanks! 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 On May 2, 2015 14:43, Alex Mandel wrote: > > Just add Deflate or LZW compression to your tif (both are loseless, JPG > is not). The ou

Re: [Qgis-user] Raster file format

Tiff is a very robust format if used correctly. Read through gdal's Creation Properties [0] and add as you see fit at "Save Raster layer as.." dialog -> "Create Options" sector N [0] http://www.gdal.org/frmt_gtiff.html On Sun, May 3, 2015 at 2:19 AM, Nicolas Cadieux wrote: > Thanks! > > Nicol

Re: [Qgis-user] Raster file format

Thanks! 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 On May 4, 2015 07:55, "ves nikos [via OSGeo.org]" wrote: Tiff is a very robust f