brian wrote:
by any chance do these tiffs have 4 bands? rgba?
In my case (not the original reporter), no. Happens with any number of
bands, well, at least with 3 and 7. Datatypes byte, float32 and int16,
if I recall correctly.
Vincent.
brian
On Thu, 2008-10-16 at 16:03 -0500, Ozy Sjahputera wrote:
I am trying to create image overviews for a GTiff file using
GDALDataset::BuildOverviews. I keep getting various errors such as:
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "Compression" while
writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "ImageWidth" while
writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag
"PlanarConfiguration" while writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "BitsPerSample"
while writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "SamplesPerPixel"
while writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "Compression" while
writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag
"PhotometricInterpretation" while writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "SampleFormat" while
writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "TileWidth" while
writing
ERROR 1: TIFFSetField:VISUAL.tif: Cannot modify tag "TileLength" while
writing
ERROR 1: TIFFBuildOverviews:Can not write tiles to a stripped image
Here is my code:
int OverviewList[5] = { 2, 4, 8, 16, 32 };
CPLErr overview_err = outDS->BuildOverviews( "AVERAGE_MAGPHASE", 5,
OverviewList, 0, NULL, NULL, NULL );
I have used BuildOverviews before on HFA images and they are fine. Any idea?
Thanks
Ozy
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