[GRASS-user] GRASS export GeoTiff adventure... continued :-)
Nikos Alexandris
nikos.alexandris at felis.uni-freiburg.de
Sun Aug 3 12:48:33 EDT 2008
On Sun, 2008-08-03 at 18:12 +0200, Markus Metz wrote:
> > So nodata=255 does not mean "loss of information"?
> > The red, green, blue channels are 8-bit (2 high 8 = 256, values
> counting
> > from 0 up to 255).
> >
> It means that NULL cells in the GRASS raster are replaced with 255 or
> the specified nodata value.
And what happens to the 255 pixels if the NULL cells become 255 after
export?
OK, let me figure this out:
I have an RGB photo with values from 0 to 255.
Import in GRASS splits in red, green, blue with values from 0 to 255
Why should I want to eliminate those 255 values after exporting? This is
what I mean loss of information.
Where am I wrong?
More information about the grass-user
mailing list