[QGIS-Developer] Exporting large GeoTIFF files from print composer

[Neumann, Andreas]

Hi Richard, 

Yes - using Linux for that purpose would be my fallback. But it is a bit
more complicated, because my Win machine is in the corporate network,
while the Linux machine is my private machine, and not part of the
network - where I have access to Postgis, and everything. 

The question is, if that error message is just an assumption, that the
export would fail - not giving the user even a chance to try, or if it
would really be a problem. 

Let's see if Matthias can find out something. 

Thanks, 

Andreas 

On 2017-07-26 14:23, Richard Duivenvoorde wrote:

> On 26-07-17 09:35, Neumann, Andreas wrote: 
> 
>> Hi,
>> 
>> I would like to export a large format QGIS print composer to a GeoTIFF file.
>> 
>> Page format is 2.4 x 1.9 m and I would like to export at 300 dpi. It is
>> for sending to a copy shop to print out for a trade fair in our province.
>> 
>> I can successfully export at 270 dpi, but if I go beyond, QGIS tells me
>> that I may experience a "memory overflow".
>> 
>> My machine is 64bit (Win 7) and has 16GB of memory.
>> 
>> Is this an arbitrary artificial threshold value where QGIS refuses to
>> export? Would it potentially work, if the barrier wouldn't exist? Could
>> I somehow bypass this barrier?
>> 
>> Thanks if you have any idea.
> 
> Hi Andreas,
> 
> Just a shot in the dark, but years ago I was not able to create a A0 pdf
> at 300dpi on a Windows (XP?) machine (memory problems), while on a Linux
> machine it just worked. Hopefully Windows has changed this, but it is
> worth trying?
> 
> Regards,
> 
> Richard
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