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How to make PyQgis to return 4 raster subdivisions calculated by inequations?

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I've been making in Raster Calculator, one by one, for every Return Period (2, 5, 10, 50, etc.) different sub-rasters of 4 sections of water depth, it's very tedious and I know there is a faster way to do this in Python. Let's say those intervals are:

depth <0.2 m

0.2 m <= depth <0.3 m

0.3 m <= depth <0.5 m

0.5 m => depth

For every RP.

I would like a script that gives me those four intervals as raster outputs in one particular PR, but so far, I can't get QgsRasterCalculator to work with those inequations. Any direction and/or guidance into this? im very new to python in Qgis and all the information available seems outdated or very cryptic.

Cheers.


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