Feature request #4820

Color interpolation "exact" does not work

Added by Giovanni Manghi over 8 years ago. Updated about 3 years ago.

Status:Open
Priority:Normal
Assignee:-
Category:Rasters
Pull Request or Patch supplied:No Resolution:
Easy fix?:No Copied to github as #:14666

Description

New description: when using "exact" then classification mode "equal intervals" or "continuous" should not be used, otherwise the raster will render transparent as the classes have values that do not exist in the raster (or just a few classes correspond to exact raster values).

clip_nulls (59.8 KB) Giovanni Manghi, 2012-01-16 06:25 AM

History

#1 Updated by Giovanni Manghi about 8 years ago

  • Tracker changed from Bug report to Feature request
  • Subject changed from Color interpolation "exact" does not work (the raster is rendered transparent) to Color interpolation "exact" does not work (make it do not use equal intervals)
  • Priority changed from High to Normal
  • Target version changed from Version 1.7.4 to Version 2.0.0

#2 Updated by Pirmin Kalberer over 7 years ago

  • Target version changed from Version 2.0.0 to Future Release - Nice to have

#3 Updated by Giovanni Manghi almost 6 years ago

  • Priority changed from Normal to High
  • Subject changed from Color interpolation "exact" does not work (make it do not use equal intervals) to Color interpolation "exact" does not work
  • Target version changed from Future Release - Nice to have to Future Release - High Priority

this raster renderer never worked as expected, I guess.

#4 Updated by Médéric RIBREUX over 4 years ago

  • Status changed from Open to Feedback

Hello, bug triage...

where can we find this option in the actual raster properties ? I can't find it anywhere...

#5 Updated by Giovanni Manghi over 4 years ago

  • Status changed from Feedback to Open

where can we find this option in the actual raster properties ? I can't find it anywhere...

raster properties, symbology tab, pseudocolor mode

#6 Updated by Médéric RIBREUX over 4 years ago

Hello,

ok, I've found it... but what should be done ? Should we disable totally the "Generate new color map" groupbox (can only fill the palette manually or with an external file) or add a new mode for specific classification (and what needs to be done on this classification or have you an idea of how to do this) in this groupbox ?

#7 Updated by Giovanni Manghi over 4 years ago

Médéric RIBREUX wrote:

Hello,

ok, I've found it... but what should be done ? Should we disable totally the "Generate new color map" groupbox (can only fill the palette manually or with an external file) or add a new mode for specific classification (and what needs to be done on this classification or have you an idea of how to do this) in this groupbox ?

the symbology for rasters in qgis is pretty weak and I found several other issues not yet reported (I think so). I will write to the de list asap and then from there we can think about what keeping open and what closing.

#8 Updated by Paolo Cavallini about 4 years ago

  • Priority changed from High to Normal
  • Status changed from Open to Feedback

The option is useful for categorical rasters; it's rather the values of the classes that should be calculated better, I guess.
I agree that users may get confused, however.
Unclear what should be done.

#9 Updated by Giovanni Manghi about 4 years ago

  • Target version deleted (Future Release - High Priority)
  • Status changed from Feedback to Open

Unclear what should be done.

sometimes it is useful to have a look to what other software does.

#10 Updated by Giovanni Manghi about 3 years ago

  • Easy fix? set to No

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