Hi,
I have been using gdal raster Calculator because it is much faster (but less flexible) then QGIS internal calculator. I know that R has a raster package but I have seen reports of this being slow also. Look for R Raster package.
Of course, hopefully there may be a answer found here. If so,
Dear GDAL Developers:
I am doing raster calculation by reading the bands as numpy array, doing
numpy calculation, and writing back the numpy array. But seems pretty
slower, what is the faster way to do it?
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