Craig, This should work.
Are you using an older GDAL version ? Are you using external libtiff ? If so, try again with newer GDAL and internal libtiff (although I wouldn't older GDAL to fail on a simple case like yours that doesn't involve TIFF compression) Le Thursday 18 June 2009 21:50:25 Dillabough, Craig, vous avez écrit : > 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 > > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev