Ticket #2346 (closed defect: fixed)

Opened 5 years ago

Last modified 4 years ago

gdaladdo generates blocky artifacts in original image

Reported by: sprice Owned by: warmerdam
Priority: normal Milestone:
Component: default Version: unspecified
Severity: normal Keywords: gdaladdo
Cc:

Description

If you take the attached file and run the command "gdaladdo -r average N020W116_x2_trueMarble.tif 3 6 12 24 48 96" artifacts appear in the upper left of the dataset. The artifacts are about 16px high, and a total of 512px wide. I've seen the artifacts in black, reddish, solid, and blocky.

Change History

Changed 5 years ago by sprice

Attachment won't work (file too large), so here's a URL:

 http://ueod-globe.net/trueMarble/N020W116_x2_trueMarble.tif.gz

I should also mention that I'm running GDAL 1.5.1 on a Mac running 10.5.

Changed 5 years ago by sprice

This problem does not seem to occur when using mode sampling.

Changed 5 years ago by rouault

I can't see any artifact in the image you've provided (I use OpenEV). Maybe it is your viewer that doesn't support big images with overviews ?

Changed 4 years ago by sderle

upgrading to 1.6.0 fixed this for me (using the UbuntuGIS packages for Hardy)

Changed 4 years ago by rouault

  • status changed from new to closed
  • resolution set to fixed

Closing then. Reopen if reproduced with recent GDAL (1.6.1 e.g.)

Note: See TracTickets for help on using tickets.