[Qgis-user] gdal mean value from tiff

[Dietrich Heintz]

Dear all,
I would like to use the mean value of a raster data set for further 
calculation within gdal --calc.
Is it possible to do this within one step?
If not can I write the mean value for each tiff-file in another file 
with the same name to use it in the second step for calculation?
What would be the format for this file, where I write my mean value? Is 
it a txt file?

I normally use OSgeo and call batch files to process line by line.

Perhaps someone has a link to an example.

Thank you in advance!
Dieter
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