[gdal-dev] python: setting nodata affects all bands

[Matt Wilkie]

> Conceptually each band has a distinct no data value.  However, in
> practice, some drivers assume a common nodata value for all bands.  Was
> this possibly a geotiff file you were operating on?  This could be
> construed as a bug or at least a deficiency of the format driver you
> were using.

Yes it was a geotiff; 3 band RGB. I'll create a bug ticket.

I've also run into trouble trying to clear the nodata value. The doc[0], 
if I'm reading the right one, says 'To clear the nodata value, just set 
it with an "out of range" value.', but what is an out of range value?

[0] 
http://www.gdal.org/classGDALRasterBand.html#c6f081d253dee55c372e54cfdd8f05a6


-- 
matt wilkie
--------------------------------------------
Geographic Information,
Information Management and Technology,
Yukon Department of Environment
10 Burns Road * Whitehorse, Yukon * Y1A 4Y9
867-667-8133 Tel * 867-393-7003 Fax
http://environmentyukon.gov.yk.ca/geomatics/
--------------------------------------------