Print composer - allow tiled raster image exports for large resolution exports

[qgib]

Author Name: baditaflorin - (baditaflorin -) Original Redmine Issue: 10822

Redmine category:map_composer/printing

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Please try a lower resolution papersize

I need to print 40000x35000 pixels images, i have 8 GB of RAM, and the image will need only 1.54 GB of Ram

How can i circumvent this warnign/error ?

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• error_print_composer.jpg (baditaflorin -)
• 64bits.jpg (baditaflorin -)

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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You'll need to use a 64 bit build of QGIS to export an image that large.

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• status_id was changed from Open to Closed
• resolution was changed from to fixed/implemented

[qgib]

Author Name: baditaflorin - (baditaflorin -)

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That is the thing, that i have a 64 bits version

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• 7603 was configured as 64bits.jpg
• status_id was changed from Closed to Reopened

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• 64bits.jpg (baditaflorin -)

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• category_id was configured as Map Composer/Printing

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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Actually looks like there's a hard limit of 32767 for either the width or height. Neither dimension can exceed this size regardless of the RAM available. We'd need to implement some form of "tiled" image exports to get around this.

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• tracker_id was changed from 1 to 2
• resolution was changed from fixed/implemented to
• subject was changed from Print composer - Trying to create image 35000x23622@300dpi may result in a memory overflow. to Print composer - allow tiled raster image exports for large resolution exports

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Nyall Dawson wrote:

Actually looks like there's a hard limit of 32767 for either the width or height. Neither dimension can exceed this size regardless of the RAM available. We'd need to implement some form of "tiled" image exports to get around this.

it this limited implemented for all platforms? I remember that while Windows had always problems in exporting large maps objects/layouts Linux had always performed well.

[qgib]

Author Name: Arthur Bogard (Arthur Bogard)

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Giovanni Manghi wrote:

it this limited implemented for all platforms? I remember that while Windows had always problems in exporting large maps objects/layouts Linux had always performed well.

I have Ubuntu 15.04 with QGIS 2.4 and also receive this error when attempting to export a file of dimensions: 213390 x 106696

My workaround is to export 32 separate tiles and then combine the tiles using GDAL. Would be much easier if I could just export this from QGIS directly.

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0

[kannes]

This should not be an issue anymore in modern QGIS 3, right?

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[kannes]

16G RAM for exporting a layout as TIF at ~80000x60000 pixels which ends up a broken file with just 32768x32768 rendered:

The UI tried to limit me to 3000 DPI but I could still increase the pixel dimensions to those ~80000x60000.

I'd say this is still an issue :(