Bug report #3049

GdalTools: merging images with different colormaps

Added by Giuseppe Sucameli about 10 years ago. Updated almost 4 years ago.

Status:Closed
Priority:Low
Assignee:-
Category:Processing/GDAL
Affected QGIS version:master Regression?:No
Operating System:All Easy fix?:No
Pull Request or Patch supplied:No Resolution:fixed/implemented
Crashes QGIS or corrupts data:No Copied to github as #:13109

Description

To mosaic colormapped images with different colormaps, you need to first convert the images to 24bit RGB format (with pct2rgb.py).

So, in the gdal tools merge tool would be nice to

add and advice

or

add a test to see if the problem occurs and then throw a warning

Note that a similar problem occurs also with gdalbuildvrt: the resulting colormap is the one of the first input raster. The result is a raster with a wrong colormap in at least 50% of its extensions.

History

#2 Updated by Giovanni Manghi almost 9 years ago

  • Target version changed from Version 1.7.0 to Version 1.7.4

#3 Updated by Paolo Cavallini over 8 years ago

  • Target version changed from Version 1.7.4 to Version 1.8.0
  • Affected QGIS version set to master
  • Crashes QGIS or corrupts data set to No

#4 Updated by Paolo Cavallini over 8 years ago

  • Target version changed from Version 1.8.0 to Version 2.0.0

#5 Updated by Paolo Cavallini almost 8 years ago

  • Assignee changed from Giuseppe Sucameli to anonymous -

#6 Updated by Jürgen Fischer over 6 years ago

  • Target version changed from Version 2.0.0 to Future Release - Lower Priority

#7 Updated by Jürgen Fischer over 6 years ago

  • Assignee deleted (anonymous -)

#8 Updated by Giovanni Manghi almost 4 years ago

  • Category changed from GDAL Tools to Processing/GDAL

#9 Updated by Alexander Bruy almost 4 years ago

  • Pull Request or Patch supplied set to No
  • Status changed from Open to Closed
  • Resolution set to fixed/implemented

Should be fixed with Processing frontend. User can create model or script to handle this case. Please reopen if necessary

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