I have a lot of (75) .asc files which I want to do the same simple raster calculation on each of (in QGIS). My calculation works when I use the raster calculator on one layer/file, but I am struggling with how to get it to run as a batch process across all 75.
When I open the raster calculator from the processing toolbox and click 'run as batch process', I assume I need to be entering my formula in the 'expression string builder'. Is that right?
If so, I don't see how to enter simple expressions (e.g. log10 of the value). If I should be doing the calculation on the 'raster_value', (a) what should I enter for its 'point' argument? (b) how do I avoid having to type the layer name manually for each of the 75 files and (c) how do I get it to set a the output name automatically (i.e. not have to manually type a different one 75 times)?
I've tried reading the manual/searching here without success.
Or would it be better to do this outside of QGIS?
Thanks very much!
[EDIT - added screenshots to show what I'm talking about. First is batch process window of raster calculator; second is what I assume to be the way to add an expression; third is the window where I assume you enter the expression, but as per the question above, this is where I'm stuck. Thanks!]