Opened 15 years ago
Last modified 14 years ago
#1722 assigned bug
Pyramids are not build if tifw contains rotations
| Reported by: | gislab | Owned by: | ersts |
|---|---|---|---|
| Priority: | minor: annoyance | Milestone: | Version 1.7.0 |
| Component: | Rasters | Version: | Trunk |
| Keywords: | pyramids | Cc: | warmerdam |
| Must Fix for Release: | No | Platform: | All |
| Platform Version: | Awaiting user input: | no |
Description
If tfw file contains rotations terms, pyramids are not build with the message: "Not supported on this type of raster".
Example attached, see lines 2 and 3, not equal to 0. Replicated in 1.0.2 and 1.2-trunk
Attachments (1)
Change History (8)
by , 15 years ago
comment:1 by , 15 years ago
| Component: | Build/Install → Rasters |
|---|---|
| Keywords: | pyramids added |
| Priority: | critical: causes crash or data corruption → minor: annoyance or enhancement |
comment:2 by , 15 years ago
| Milestone: | → Version 1.2.0 |
|---|
comment:3 by , 15 years ago
| Cc: | added |
|---|---|
| Owner: | changed from to |
| Status: | new → assigned |
follow-up: 6 comment:5 by , 15 years ago
Overviews can actually be built on vrt warped images *however* that doesn't work in the QGIS case where the warped VRT is actually just temporary - not saved to disk.
We could also build overviews on the underlying image *however* at this time the GDAL warp api underlying warped VRTs does not take advantage of overviews.
comment:6 by , 15 years ago
| Platform: | Windows → All |
|---|
Replying to warmerdam:
We could also build overviews on the underlying image *however* at this time the GDAL warp api underlying warped VRTs does not take advantage of overviews.
Thanks Frank, that was the nugget I was looking for. So for now I guess we will just keep the ticket open and watch the following ticket
comment:7 by , 14 years ago
| Milestone: | Version 1.5.0 → Version 1.6.0 |
|---|
This is because the image is warped when it is loaded and considered a 'warped virtual dataset'. The image being drawn is not the original base image, though we do still have a pointer to that base image.
It seems like pyramids could be build for the based image, and then reloaded and rewarped again, but I need to check with the GDAL folks to see if pyramids are supported at all with virtual datasets.