Wow, a python question I actually know the answer too! :)
From python you can use "band.SetNoDataValue( float(null_value) )". For
this in context see this tiny utility:
http://maphew.googlecode.com/svn/trunk/gis/gdal_extras/bin/gdalsetnull.py
And the doc on this function:
http://www.gdal.org/classGDALRasterBand.html#c6f081d253dee55c372e54cfdd8f05a6
cheers,
matt wilkie
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Geographic Information,
Information Management and Technology,
Yukon Department of Environment
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--------------------------------------------
Roger André wrote:
Hi,
I'm getting raster data written by different people who can't seem to
use the same nodata values. I'm reading the data files via the Python
API to GDAL, and doing various calculations on the data values, then
writing new rasters with the results of my calculations. Is there a
"nodata" value that I can assign to a pixel that the gdal utilities will
recognize as such later on? All my other values are 32-bit floating
point values, so I'm not sure what value to assign.
Thanks.
Roger
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