Allow set DPI in "save as image"

[qgib]

Author Name: Aren Cambre (Aren Cambre)
Original Redmine Issue: 3979

Redmine category:unknown

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Please provide a simple, high resolution image export. Our only choices appear to be the File > Save as Image, which has no options, or the Print Composer, which takes several steps and is really designed for creating a hardcopy print.

It would be nice to just have a way to do something like File > Save as Image, but be able to choose a bounding rectangle for the export and specify certain export properties, like resolution or DPI, image format, etc.

[qgib]

Author Name: Aren Cambre (Aren Cambre)

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This is the only way I know to do it now: http://underdark.wordpress.com/2010/11/30/creating-high-resolution-images-using-qgis/

This way seems to produce mediocre quality images.

[qgib]

Author Name: Paolo Cavallini (@pcav)

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• category_id was configured as 33
• pull_request_patch_supplied was configured as 0

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Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was configured as Version 1.7.4

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Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was changed from Version 1.7.4 to Version 2.0.0

[qgib]

Author Name: Aren Cambre (Aren Cambre)

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I'm going to be bold and say that this is more than normal priority. It's really important that a graphical information system be capable of producing good quality graphics.

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• priority_id was changed from Normal to High

[qgib]

Author Name: Paolo Cavallini (@pcav)

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From https://issues.qgis.org/wiki/quantum-gis/Bugreports#Steps :

High - a bug which has a major effect on the usability of a package.

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• priority_id was changed from High to Normal

[qgib]

Author Name: Pirmin Kalberer (Pirmin Kalberer)

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• fixed_version_id was changed from Version 2.0.0 to Future Release - Nice to have

[qgib]

Author Name: Aren Cambre (Aren Cambre)

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It's currently 8 not-so-intuitive steps using the Print Composer: http://arencambre.com/blog/2013/06/02/getting-high-quality-graphics-out-of-qgis/

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• category_id was changed from 33 to Map Composer/Printing

[qgib]

Author Name: Antonio Locandro (Antonio Locandro)

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I would have to agree with Aren on this, I had a client complain how the image resolution was just sub optimal. I spend some time investigating the issue until I came to this issue which references a blog post "output size cannot be specified directly. It simply saves the currently visible map. Most of the time this resolution will not be satisfactory."

I believe with latest improvements in Print Composer is a shame this is still an issue and that I can't set the DPI as in other COTS.

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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If you're working from a print composer you can set the DPI, and export in high resolution. This request is for a way to specify image size when exporting the map canvas from the main window.

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• category_id removed Map Composer/Printing

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• subject was changed from Easy high resolution image export to Allow set DPI in "save as image"

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Antonio Locandro wrote:

is a shame

qgis development is user driven, if someone will really need this option I guess that could be easily implemented.

[qgib]

Author Name: Médéric RIBREUX (Médéric RIBREUX)

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Hello, bug triage...

still present in QGIS 2.13. Some hints:

• there is QgisApp::saveMapAsImage method which opens the QFileDialog...
• ...and then launch QgsMapCanvas::SaveAsImage

If a QPixmap is passed as an argument to QgsMapCanvas::SaveAsImage, the saved file gets the resolution of the QPixmap. So perhaps we need to modify QGisApp::saveMapAsImage to ask for a width/height or DPI, compute a QPixmap and use it for QgsMapCanvas::SaveAsImage ? Or is there something else that we can try ?

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0

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Author Name: Jürgen Fischer (@jef-n)

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• category_id was configured as Unknown

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Author Name: Salvatore Larosa (@slarosa)

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• status_id was changed from Open to Closed
• description was changed from Please provide a simple, high resolution image export. Our only choices appear to be the File > Save as Image, which has no options, or the Print Composer, which takes several steps and is really designed for creating a hardcopy print.

It would be nice to just have a way to do something like File > Save as Image, but be able to choose a bounding rectangle for the export and specify certain export properties, like resolution or DPI, image format, etc. to Please provide a simple, high resolution image export. Our only choices appear to be the File > Save as Image, which has no options, or the Print Composer, which takes several steps and is really designed for creating a hardcopy print.

It would be nice to just have a way to do something like File > Save as Image, but be able to choose a bounding rectangle for the export and specify certain export properties, like resolution or DPI, image format, etc.

• resolution was changed from to fixed/implemented