Feature request #9043
"No data" in multi-band data
| Status: | Open | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | Rasters | ||
| Pull Request or Patch supplied: | No | Resolution: | |
| Easy fix?: | No | Copied to github as #: | 17697 |
Description
I'm going to put this as a "feature request" though it might be considered a bug.
I have three band raster data. On the "transparency" page I've set "0" to be "no data". The problem is, if even one of the three bands has a "0", QGIS renders the entire pixel as being "no data". As such I get entire fields filled with "no data" speckles because a single band (red) is often 0.
I'd suggest allowing the user to set "no data" on a per-band basis or requiring that all symbolised pixels be no data before rendering as no-data.
History
#1
Updated by Martin Dobias about 11 years ago
Isn't it sufficient to setup custom transparency pixel list in the Transparency tab? It is possible to choose which colors (R,G,B) should be transparent.
#2
Updated by Jonathan Moules about 11 years ago
I didn't know about that. But seeing it now, what's the point of having the "no data value" option at all?
#3
Updated by Etienne Tourigny about 11 years ago
Individual raster bands have a nodata value, so it's a simple way to mask them.
#4
Updated by Paolo Cavallini almost 11 years ago
- Category set to Rasters
#5
Updated by Giovanni Manghi about 8 years ago
- Easy fix? set to No