Overviews have strange artifact

[crschmidt]

When processing .sid imagery, I have followed the following steps:

• gdal_translate to pull out a section of the image via -srcwin
• gdalwarp to transform the image to EPSG:4326
• gdaladdo on the tiff file to add 6 layers of overlays

The resulting overlays have a strange discoloration in the lower right corner.

The tasks were performed with FWTools 1.3.9, and the images were read via MapServer with GDAL 1.4.0.

I will put data online for retrieval shortly.

[crschmidt]

A file which is affected by this is available on the TelaScience HyperCube machine as:

/mnt/agami/san_diego_dg/san_diego_2006_r1c1.tiff

[crschmidt]

I have continued to experience this problem with every image i've created using FWTools 1.3.9, including images where .sid is not at all involved.

It can be seen at:

​http://hypercube.telascience.org/openaerialmap/?lon=-78.15405&lat=35.49586&zoom=14&layers=B

[crschmidt]

This behavior does not exist with the GDAL 1.4.0 gdaladdo -- only when using FWTools gdaladdo with GDAL 1.4.0 read. (I can't confirm that FWTools images are read correctly by FWTools MapServer, unfortunately.)

[crschmidt]

This behavior is fixed in GDAL SVN trunk, confirmed by westside.