Bug report #5858
Georeferencer ignores "Use 0 for transparency when needed" switch
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | C++ plugins/Georeferencer | ||
| Affected QGIS version: | 1.8.0 | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | no timely feedback |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 15323 |
Description
When I tick the "Use 0 for transparency when needed" and click "Start georeferencing" against an image that is rotated, I end up with a GeoTiff that has 3 bands, and black triangles in each corner. However, if I click "Generate GDAL script" and manually run the generated commands, a 4 band GeoTiff is created, with Band 4 as an alpha layer and the 4 corner triangles marked as transparent.
It seems that Georeferencer is not applying the -dstalpha flag when running gdalwarp (this is the only difference in the generated script when the "Use 0 for transparency when needed" is toggled).
History
#1
Updated by Paolo Cavallini over 12 years ago
- Target version set to Version 2.0.0
#2
Updated by Jürgen Fischer over 10 years ago
- Target version changed from Version 2.0.0 to Future Release - Lower Priority
#3
Updated by Jürgen Fischer over 10 years ago
- Category changed from C++ Plugins to C++ plugins/Georeferencer
#4
Updated by Giovanni Manghi over 7 years ago
- Regression? set to No
- Easy fix? set to No
#5
Updated by Giovanni Manghi almost 7 years ago
- Status changed from Open to Feedback
Please test with a recent QGIS release (2.18 or 3), if the issue/request is still valid change the affected version accordingly, if is fixed/implemented then close the ticket. Thanks!
#6
Updated by Jürgen Fischer almost 6 years ago
- Resolution set to no timely feedback
- Status changed from Feedback to Closed