Trasparent pixels list turns NULLs into "0"

[qgib]

Author Name: Giovanni Manghi (@gioman)
Original Redmine Issue: 5730
Affected QGIS version: master
Redmine category:rasters

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Take a rasters with NULLS (example http://www.faunalia.pt/downloads/declives_pttm06.tar.gz )

with the greyscale colormap is all OK.

Give it a different colormap and the NULLs will be given a colour (not handy).

Then enter the raster properties and in the trasparent pixel list use the "add values from display" tool to pick the NULLs and turn them trasparent -> the NULLs will turn to "0" and so the "0" pixels will become transparent instead of the NULLs ones.

This was observed on both master and 1.7.4

[qgib]

Author Name: stefano campus (@skampus)

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in my experience, the only solution is to reclassify no data values to -99999.
in this case all works fine and transparency is mantained.

[qgib]

Author Name: Paolo Cavallini (@pcav)

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• fixed_version_id was configured as Version 2.0.0

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Solved in master.

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• resolution was changed from to fixed
• status_id was changed from Open to Closed