Hi Nicolas,

Thanks for the feedback, you correct in that reducing the size does not change 
anything! I will try out the other Raster calculators in the processing toolbox 
to see if they work while I wait on an install of the latest QGIS version.

Thanks,
Finbar

From: Nicolas Cadieux [mailto:[email protected]]
Sent: 16 January 2019 16:35
To: GILLEN Finbar <[email protected]>
Cc: Alessandro Pasotti <[email protected]>; [email protected]
Subject: Re: [Qgis-user] Raster Calculator Crashing

Hi,

Comprising the file will probably not change anything.  Either the matrix hight 
and width is too big for the memory or your are running into a new problem.  
The calculator was modified.  It can now handle very big rasters at a decent 
speed.  (Bravo team!) you could use the saga calculator or the gdla_calc.  Both 
your files will need to have the same extent,  CRS and pixel posting for those 
algorithms to work. There is a algorithm in the raster menu that will help you 
match the files.  Beware of the effects this will have on the data.

Nicolas

Le 16 janv. 2019 à 11:25, GILLEN Finbar 
<[email protected]<mailto:[email protected]>> a écrit :
Hi Alessandro,

Testing the latest master version involves going through IT security to get an 
install which can take weeks to get resolved… but I am trying a workaround by 
using Translate (Convert Format) tool to compress the file and see if it will 
pass through the calculator.

But in the meantime I will look into getting the latest version of QGIS.

Thanks again,
Finbar

From: Alessandro Pasotti [mailto:[email protected]]
Sent: 16 January 2019 14:45
To: GILLEN Finbar <[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [Qgis-user] Raster Calculator Crashing


On Wed, Jan 16, 2019 at 3:41 PM GILLEN Finbar 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

I am using the Raster Calculator in QGIS 3.2.1 and it keeps crashing. The 
Raster file is 5,000,000kb in size… does anyone know any way around this?

I this was an issue before but it was resolved - 
https://issues.qgis.org/issues/18417



Gillen,

a lot of changes have been done on the raster calc lately, can you test latest 
master version?

--
Alessandro Pasotti
w3:   www.itopen.it<http://www.itopen.it>
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