[Qgis-user] qgis and Large Format Print

[Marco Hugentobler]

Hi all

It needs a bit more examination in which cases the problems occure. It 
is reasonable to me that there is a crash if 'print as raster' is 
checked and for the export to image file. In these cases, the whole 
composer content is rendered into one big image first.
It is not clear to me why it crashes (or if it doesn't?) if printing to 
pdf (without print as raster). Because QGIS tiles the rasters internally 
and draws the images one by one using QPrinter. So in theory, this 
should already work without using too much memory.

Regards,
Marco

On 16.11.2012 10:03, Bernhard Ströbl wrote:
> I did not thoroughly check now but as far as I remember
> - with big rasters: yes (only vectors: no)
> - WMS: yes (have to try again with new tile-option in 1.8)
> - all printers and pdf/png export
> - QGIS fails
>
> We normlly print in pdf (freePDF or PDFCreator)
> formats: anything larger than A1
>
> Bernhard
>
>
> Am 16.11.2012 09:26, schrieb Andreas Neumann:
>> The important thing would be to find out in what situation the printing
>> fails?
>>
>> * Is it related to big rasters?
>> * Are WMS used?
>> * Is it failing on all printer or only certain printers?
>> * Is the printer failing (some printers rund out of memory if you send
>> big files) or is QGIS failing?
>>
>> There are so many unknowns that it is kind of hard to find out where
>> exactly the printing fails.
>>
>> I do not print large formats too often, but I don't remember having
>> problems often. We print with an old HP Designjet.
>>
>> Andreas
>>
>> On Fri, 16 Nov 2012 08:55:50 +0100, Bernhard Ströbl wrote:
>>> Am 16.11.2012 08:32, schrieb Luca Manganelli:
>>>> Il 15/11/2012, qgis-user-bounces at lists.osgeo.org ha scritto:
>>>>
>>>>> Unfortunately, in many Public Administrations here in Italy, the
>>>>> upgrade
>>>>> cycle for hardware is not so fast, so for several years we expect to
>>>>> have still 32 bits (or 64 bit installed with 32 bit win).
>>>>> In any case, I guess a 64 bit win build is not yet available, right?
>>>>> So, in short, it would be good to have an idea wheter it is 
>>>>> possible to
>>>>> find a solution also for 32's.
>>>>> Marco, any idea?
>>>>> Thanks.
>>>>
>>>> I can confirm this situation. Many corporate machines are still
>>>> running 32
>>>> bit operating system (Windows XP) because they must guarantee
>>>> compatibility
>>>> with certain old software.
>>>>
>>>> It's not a good excuse to say "go to 64 bit!" because for years
>>>> ArcMap was
>>>> able to print very large and complex (A0 format and beyond) maps on
>>>> PC with
>>>> only 2GB of RAM.
>>>>
>>>
>>> The print problems on Win32 are a major drawback here as large format
>>> plans are needed.
>>> Just to illustrate what Luca wrote: We are a city administration
>>> running around 1200 PCs with some 500+ applications on WinXP. Hardware
>>> is less a problem (almost all machines will be 64 bit next year) than
>>> to ensure compatibility of _all_ applications with Win64. This needs
>>> intense testing and negotiations with software companies and thus -
>>> time.
>>>
>>> Bernhard
>>>
>>>
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>


-- 
Dr. Marco Hugentobler
Sourcepole -  Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee