Bug report #18274

Print Composer in 3.0.0 export to TIF forgets to define RowsPerStrip in TIF

Added by JW van Aalst over 2 years ago. Updated almost 2 years ago.

Status:Closed
Priority:High
Assignee:-
Category:Map Composer/Printing
Affected QGIS version:3.0.0 Regression?:Yes
Operating System:Windows 10 64-bit Easy fix?:No
Pull Request or Patch supplied:No Resolution:up/downstream
Crashes QGIS or corrupts data:No Copied to github as #:26165

Description

In QGIS 3.0.0, When atlas-exporting to TIF in the print composer, the resulting TIF files have no RowsPerStrip defined. So GDAL notices.
QGIS doesn't crash, but the resulting TIF data is not readable in other programs (unless first corrected using GDAL).
Tested on Windows 10 with QGIS 3.0.0 64-bit.

History

#1 Updated by Giovanni Manghi over 2 years ago

  • Category changed from Rasters to Map Composer/Printing
  • Status changed from Open to Feedback

How about 2.18? the result is different?

#2 Updated by JW van Aalst over 2 years ago

In QGIS 2.18.16, TIF files export fine (although uncompressed; the compression is certainly an improvement in 3.0.0).

#3 Updated by Giovanni Manghi over 2 years ago

  • Regression? changed from No to Yes
  • Priority changed from Normal to High
  • Status changed from Feedback to Open

#4 Updated by Nyall Dawson over 2 years ago

  • Resolution set to up/downstream
  • Status changed from Open to Feedback

This is an upstream issue in Qt. Our choices here are:

1. removing the the compression
2. leaving the missing RowsPerStrip definition out

I'm leaning to 1

#5 Updated by JW van Aalst over 2 years ago

1: Agreed. In either case I'm going to have to use GDAL to further process the TIFs anyway (including compressing them). If the RowsPerStrip remains undefined, Photoshop won't open the (larger) TIFs.

#6 Updated by Even Rouault about 2 years ago

I've proposed a patch to QT to set the RowsPerStrip tag: https://bugreports.qt.io/browse/QTBUG-68609

#7 Updated by Even Rouault about 2 years ago

A variation of my patch has been committed for QT 5.11.1

#8 Updated by Giovanni Manghi almost 2 years ago

  • Status changed from Feedback to Closed

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