<meta http-equiv="content-type" content="text/html; charset=utf-8"><div></div><div>Hi,</div><div><br></div><div>Are you using the same interpolation methods? If you used nearest neighbour normally and changed to cubic, if could take much more time for the same thing. Check the file size and try with a smaller file. Could be a very simple thing....</div><div><br></div><div>Nicolas</div><div><br>Le 15 mai 2017 à 06:39, UserError [via <a href="http://OSGeo.org" target="_top" rel="nofollow" link="external">OSGeo.org</a>] <<a href="/user/SendEmail.jtp?type=node&node=5320560&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> a écrit :<br><br></div><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<font face="Arial">QGIS 2.18 on Linux Mint 18.1 64 bit<br>
<br>
I recently had to clean install my OS & QGIS etc. Whilst
it's mostly working, the raster georeferencer is unusably slow
most of the time.<br>
<br>
I thought initially it didn't like jpgs and pdfs were OK, but it
is the same regardless. On clicking transform, the progress
indication window opens & it will sit there for an
indeterminate period (I left it over 30 minutes once). There is a
lot of CPU activity across all four cores. The only way out I've
found is to kill QGIS.<br>
<br>
If I have the Target Resolution box empty, the result is an image
comprising large blocks/pixels and a wide black component. If I
select the target resolution, I can improve the image (but still
unusable) however, to get anything vaguely usable, the process
takes ages as mentioned above<br>
<br>
All my previous installations have been fine & I have never
had a problem with the georeferencer.<br>
<br>
Any ideas where to look please?<br>
Many thanks</font>
<div class="moz-signature">-- <br>
<font font-family="Helvetica" color="#4d583d" size="3"> Jonathan
Webb <br>
Freelance GIS Specialist <br>
07941 921905 <br>
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