Re: [gdal-dev] 8-bit GeoTIFF and transparency over multiple bands

2008-09-23 Thread Frank Warmerdam
D wrote: I would need to know, if a three band (RGB) 8-bit GeoTIFF can have transparency enabled? I know that it is possible to enable transparency on a singleband TIFF. Can someone confirm this? Dejan, Multi-band TIFF files represent transparency using an alpha band. Best regards, -- ---

Re: [gdal-dev] 8-bit GeoTIFF and transparency over multiple bands

2008-09-23 Thread Vincent Schut
D wrote: I would need to know, if a three band (RGB) 8-bit GeoTIFF can have transparency enabled? No, there would be no way to know the transparency for a pixel if there are only red/green/blue values available. For that you'll need a 4-band (rgba) image. I know that it is possible to enabl

[gdal-dev] 8-bit GeoTIFF and transparency over multiple bands

2008-09-23 Thread D
I would need to know, if a three band (RGB) 8-bit GeoTIFF can have transparency enabled? I know that it is possible to enable transparency on a singleband TIFF. Can someone confirm this? Best regards, Dejan Gregor ___ gdal-dev mailing list gdal-dev@lis