[gdal-dev] gdaladdo

[Dillabough, Craig]

Hi,
I am trying to tile and create overviews for a TIFF image dataset I
have, but I keep getting strange errors when attempting to add
overviews. 

1st I created a copy of the original image (same format and all, but
wanted to keep the original around in case I had problems).

>gdal_translate -ot Float32 -of GTiff Av.MaxNDVI.2000.2009.Week.19.tif
trans/week19.tif
>cd trans

Then I tiled the image (I guess I could have done this in one step by
adding -co "TILED=YES" to the previous step):

>gdal_translate -ot Float32 -of GTiff -co "TILED=YES" week19.tif
week19_tiled.tif

Then I tried to add the overviews:

> gdaladdo -r average -ro week19_tiled.tif 2 4 8 16

I get the following (I've added some whitespace for clarity):
0...10...20...30...40...50...60...70...
Warning 1: TIFFReadDirectory:week19_tiled.tif.ovr: Wrong
"StripByteCounts" field, 
ignoring and calculating from imagelength
Warning 1: TIFFReadDirectory:week19_tiled.tif.ovr: Wrong
"StripByteCounts" field, 
ignoring and calculating from imagelength
ERROR 1: week19_tiled.tif.ovr:DumpModeDecode: Not enough data for
scanline 0
ERROR 1: TIFFReadEncodedTile() failed.

ERROR 1: IReadBlock failed at X offset 0, Y offset 3
ERROR 1: GetBlockRef failed at X block offset 0, Y block offset 3

I get effectively the same error when I run this without the -ro option.

Any idea's what is going wrong.

Regards,
Craig Dillabaugh