I've got 150 monoband raster files (with 0 and 1 values ) and I want to "fuse" or stack them as I would do it with the raster calculator : A+B+C.....

I can manage to create a VRT file containing 150 bands but how would I transform it to a monoband TIFF with values going from 0 to 150 ?

  • One option is to use gdal_calc python script gdal.org/programs/gdal_calc.html but it is written to use input bands A-Z so that it can't take 150 inputs. I guess it is possible to edit the script to accept more inputs.
    – user30184
    Apr 27, 2020 at 10:25
  • Yep ,indeed . a solution for me might be to use it for each .tif creation (rather than waiting having my 150 tiles calculated). But is it possible to flatten each band of a .vrt into one by summing all ?
    – FabKzo
    Apr 27, 2020 at 12:17

1 Answer 1


In QGIS, my suggestion is to use SAGA Rasters sum tool (which is in the Processing Toolbox > SAGA > Raster Calculus.

Processing 150 raster files would require intensive computing;

  • Put your raster files in a folder / directory.
  • Restart QGIS first (or at least avoid displaying your raster layers on QGIS canvas).
  • Start Rasters sum tool.
  • Click on the ... button of Grids selection, then click on Add Directory... and select the folder.

enter image description here

I have not done this with 150 files... you may have to separate them into several folders and repeat the process.

  • Thanks, Indeed I use QGIS ; tested but this takes a very very (too) long time. I wonder if there a way to make it with imagemagick ...
    – FabKzo
    Apr 27, 2020 at 9:44

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