<p dir="ltr">Thanks!</p>
<p dir="ltr">Nicolas Cadieux M.Sc.<br>
Les Entreprises Archéotec inc. <br>
8548, rue Saint-Denis Montréal H2P 2H2<br>
Téléphone: 514.381.5112 Fax: 514.381.4995<br>
www.archeotec.ca</p>
<div class="gmail_quote">On May 4, 2015 07:55, "ves nikos [via OSGeo.org]" <<a href="/user/SendEmail.jtp?type=node&node=5204092&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote:<br type='attribution'><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Tiff is a very robust format if used correctly. Read through gdal's
<br />Creation Properties [0] and add as you see fit at "Save Raster layer
<br />as.." dialog -> "Create Options" sector
<br /><br />N
<br /><br /><br />[0] <a href="http://www.gdal.org/frmt_gtiff.html" target="_top" rel="nofollow" link="external">http://www.gdal.org/frmt_gtiff.html</a><br /><br />On Sun, May 3, 2015 at 2:19 AM, Nicolas Cadieux
<br /><<a href="/user/SendEmail.jtp?type=node&node=5203980&i=0">[hidden email]</a>> wrote:
<div><div class='shrinkable-quote'><br />> Thanks!
<br />>
<br />> Nicolas Cadieux M.Sc.
<br />> Les Entreprises Archéotec inc.
<br />> 8548, rue Saint-Denis Montréal H2P 2H2
<br />> Téléphone: 514.381.5112 Fax: 514.381.4995
<br />> www.archeotec.ca
<br />>
<br />> On May 2, 2015 14:43, Alex Mandel <<a href="/user/SendEmail.jtp?type=node&node=5203980&i=1">[hidden email]</a>> wrote:
<br />>>
<br />>> Just add Deflate or LZW compression to your tif (both are loseless, JPG
<br />>> is not). The output files will be 10%-50% the size of the original in
<br />>> most cases.
<br />>>
<br />>> See the following post for a comparison of settings.
<br />>> <a href="http://linfiniti.com/2011/05/gdal-efficiency-of-various-compression-algorithms/" target="_top" rel="nofollow" link="external">http://linfiniti.com/2011/05/gdal-efficiency-of-various-compression-algorithms/</a><br />>>
<br />>> Enjoy,
<br />>> Alex
<br />>>
<br />>> On 05/02/2015 07:36 AM, Nicolas Cadieux wrote:
<br />>> > Hi,
<br />>> >
<br />>> > 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.
<br />>> >
<br />>> > 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.
<br />>> >
<br />>> > Thanks for the help.
<br />>> >
<br />>> > Nicolas Cadieux M.Sc.
<br />>> > Les Entreprises Archéotec inc.
<br />>> > 8548, rue Saint-Denis Montréal H2P 2H2
<br />>> > Téléphone: 514.381.5112 Fax: 514.381.4995
<br />>> > www.archeotec.ca
<br />>> > _______________________________________________
<br />>> > Qgis-user mailing list
<br />>> > <a href="/user/SendEmail.jtp?type=node&node=5203980&i=2">[hidden email]</a>
<br />>> > <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user" target="_top" rel="nofollow" link="external">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br />>> >
<br />>>
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