Bug report #7166
raster resampling does not work when reprojection is on.
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Severe/Regression | ||
| Assignee: | - | ||
| Category: | Rasters | ||
| Affected QGIS version: | master | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | fixed |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 16219 |
Description
Happens even if the raster is not actually reprojected, is just enough to have OTFR on. Tested on QGIS master.
As a new feature not working as should be, I tag this as blocker.
History
#1
Updated by Giovanni Manghi almost 12 years ago
- Subject changed from resampling does not work for reprojected rasters to raster resampling does not work when reprojection is on.
#2
Updated by Radim Blazek over 11 years ago
- Status changed from Open to Feedback
Works for me. Both if reprojection is on and raster is not reprojected and if raster is reprojected.
Note that resampling is done before reprojection. If source and target CRS are very different, it may happen that resampling effect is lost because neighbour pixel in target are not neighbour in source. I would call this feature, at least for now (2.0).
#3
Updated by Giovanni Manghi over 11 years ago
- Resolution set to fixed
- Status changed from Feedback to Closed
#4
Updated by Radim Blazek over 11 years ago
There were some bugs in resampler. If oversampling was 1, it was not doing resampling and returning smaller block (by 1 row,col) than requested. That could result in completely distorted raster and zoomed in resampler was never used with reprojection because reprojector limits resolution exactly to raster resolution. It should be fixed in 36bf93c.