I am looking to utilise gdal_calc to batch binarise a few hundred rasters. I am having dificulty though in relation to the correct formula to achieve this. I am trying to make all the values between -20 and -15 in a raster = 1 and everything else = 0, making 0 NoData.
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2Possible duplicate of How to conditionnally assign a new value to pixels of a raster image?– pLumoCommented Dec 12, 2017 at 16:07
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1 Answer
You can use gdal_calc.py with conditional statements.
This should do the trick:
gdal_calc.py -A input.tif --outfile=result.tif --calc="(A>=-20)*(A<=-15)" --NoDataValue=0
or
gdal_calc.py -A input.tif --outfile=result.tif --calc="logical_and(A>=-20,A<=-15)" --NoDataValue=0
This returns values 0 and 1. Add "255*" if you want values 0 and 255.
