[gdal-dev] GeoTIFF NoData

2018-02-05 Thread Julierme Pinheiro
Hi all, Sorry if my question has been discussed here before. I followed 1 Answer/Option 2 of this post to convert an image (GeoTIFF) external pixels RGB(255,255,255) to NoData. So, I used

Re: [gdal-dev] Geotiff nodata handling

2014-06-23 Thread Jukka Rahkonen
Even Rouault even.rouault at mines-paris.org writes: This is a rather tricky area indeed. A few facts : - The concept of nodata value in GDAL is something per band, which leave multi-band processing of nodata values subject to interpretation. - The TIFFTAG_GDAL_NODATA extension tag in

[gdal-dev] Geotiff nodata handling

2014-06-18 Thread Andrea Aime
Hi, I'm trying to wrap my head around how gdal handles nodata values. In an image with this gdalinfo exceprt: Band 1 Block=512x512 Type=Byte, ColorInterp=Red NoData Value=0 Band 2 Block=512x512 Type=Byte, ColorInterp=Green NoData Value=0 Band 3 Block=512x512 Type=Byte, ColorInterp=Blue

Re: [gdal-dev] Geotiff nodata handling

2014-06-18 Thread Even Rouault
Le mercredi 18 juin 2014 18:35:49, Andrea Aime a écrit : Hi, I'm trying to wrap my head around how gdal handles nodata values. In an image with this gdalinfo exceprt: Band 1 Block=512x512 Type=Byte, ColorInterp=Red NoData Value=0 Band 2 Block=512x512 Type=Byte, ColorInterp=Green