Color interpolation "exact" does not work

[qgib]

Author Name: Giovanni Manghi (@gioman)
Original Redmine Issue: 4820

Redmine category:rasters

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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).

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• clip_nulls (Giovanni Manghi)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• tracker_id was changed from 1 to 2
• subject was 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_id was changed from High to Normal
• fixed_version_id was changed from Version 1.7.4 to Version 2.0.0

[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: Giovanni Manghi (@gioman)

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this raster renderer never worked as expected, I guess.

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• priority_id was changed from Normal to High
• subject was changed from Color interpolation "exact" does not work (make it do not use equal intervals) to Color interpolation "exact" does not work
• fixed_version_id was changed from Future Release - Nice to have to Future Release - High Priority

[qgib]

Author Name: Médéric RIBREUX (Médéric RIBREUX)

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Hello, bug triage...

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

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• status_id was changed from Open to Feedback

[qgib]

Author Name: Giovanni Manghi (@gioman)

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

raster properties, symbology tab, pseudocolor mode

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• status_id was changed from Feedback to Open

[qgib]

Author Name: Médéric RIBREUX (Médéric RIBREUX)

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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 ?

[qgib]

Author Name: Giovanni Manghi (@gioman)

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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.

[qgib]

Author Name: Paolo Cavallini (@pcav)

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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.

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• priority_id was changed from High to Normal
• status_id was changed from Open to Feedback

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Unclear what should be done.

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

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• fixed_version_id removed Future Release - High Priority
• status_id was changed from Feedback to Open

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0