translate all subdatasets.
Thanks for your opinions.
De: Even Rouault
Enviat el: dimecres, 21 de maig de 2025 21:04
Per a: Abel Pau ; gdal-dev
Tema: Re: [gdal-dev] NODATA values in diferents bands in a DataSet
Le 21/05/2025 à 20:53, Abel Pau a écrit :
Okay,
Le 21/05/2025 à 20:53, Abel Pau a écrit :
Okay, thanks!
So the interpretation we are aiming for is option *a)*:
Each band is treated independently, and each one has its own NODATA
value. The NODATA value of one band is unrelated to that of the others.
That said, the question is whether this beh
x27;m looking forward to hearing your thoughts on what the best approach would be
in a case like this.
Abel.
De: Even Rouault
Enviat el: dimecres, 21 de maig de 2025 16:55
Per a: Abel Pau ; gdal-dev
Tema: Re: [gdal-dev] NODATA values in diferents bands in a Da
Abel,
there is a subtelty:
a) If bands may have invalid pixels at different locations on different
bands, and that those bands have a different nodata value, then using
GDALRasterBand::SetNoDataValue() is the way to go.
b) If a given pixel is invalid only if its value on all bands matches
Hi,
On writing side nodata=none seems to work.
gdalwarp -of VRT -dstnodata "0 none 0" p4433h.tif nodata.vrt
gdalinfo nodata.vrt
...
Band 1 Block=512x128 Type=Byte, ColorInterp=Red
NoData Value=0
Overviews: 6000x6000, 3000x3000, 1500x1500, 750x750, 375x375, 188x188
Band 2 Block=512x128 Type=B
