Hello
I have a problem with the geotiff (GTiff) driver.
I create a 4-bands raster image in a c++ program. The fourth band was
considered as an alpha band in the geotiff image (actually, it is near
infrared : NIR)
$ gdalinfo new_geotiff.tif
Driver: GTiff/GeoTIFF
Files: new__geotiff.tif
Size is 10
Selon Nicolas Mayer :
Retry by setting the PHOTOMETRIC creation option to MINISBLACK. Otherwise, by
default, without specifying it, GDAL assumes that the PHOTOMETRIC is RGB and
that the 4th band is an alpha band.
You should get :
Band 1 Block=100x20 Type=Byte, ColorInterp=Gray
Band 2 Block=100x20
Even, thank you very much for answering me so quicly
With the PHOTOMETRIC creation option to MINISBLACK, I get now :
Band 1 Block=100x20 Type=Byte, ColorInterp=Gray
Band 2 Block=100x20 Type=Byte, ColorInterp=Undefined
Band 3 Block=100x20 Type=Byte, ColorInterp=Undefined
Band 4 Block=100x20 Type=By
Selon Nicolas Mayer :
> Even, thank you very much for answering me so quicly
>
> With the PHOTOMETRIC creation option to MINISBLACK, I get now :
> Band 1 Block=100x20 Type=Byte, ColorInterp=Gray
> Band 2 Block=100x20 Type=Byte, ColorInterp=Undefined
> Band 3 Block=100x20 Type=Byte, ColorInterp=Und
Even, Thank you very much !
With the two creation options : PHOTOMETRIC=RGB and ALPHA=NO, I obtain the
same behaviour I whish.
Can you explain me where you found this answer ? (to help me to become more
autonomous with GDAL)
Thank you again
Nicky
2011/4/18 Even Rouault
> Selon Nicolas Maye
Selon Nicolas Mayer :
> Even, Thank you very much !
>
> With the two creation options : PHOTOMETRIC=RGB and ALPHA=NO, I obtain the
> same behaviour I whish.
>
> Can you explain me where you found this answer ? (to help me to become more
> autonomous with GDAL)
>
Well, for an advanced question lik
OK. Thank you very much.
Nicky
2011/4/18 Even Rouault
> Selon Nicolas Mayer :
>
> > Even, Thank you very much !
> >
> > With the two creation options : PHOTOMETRIC=RGB and ALPHA=NO, I obtain
> the
> > same behaviour I whish.
> >
> > Can you explain me where you found this answer ? (to help me t