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I'm modelling species distributions using Maxent. Maxent produced probability of occurrence/habitat suitability maps for my study species. These raster maps have values ranging from 0 to 1.

I want to transform these maps in a binary map of suitable and unsuitable areas, by using a threshold.

It would be something like this:

From 0 to threshold (not included) = 0 ; From threshold (included) to 1 = 1

I thought about using the QGIS tool r.reclass, but I'm failing to understand how to provide the (included) or (not included) information to the reclassify rules.

Can anyone help?

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Use raster calculator with raster@1 >= N, where raster@1 is the name of your raster layer and band, and N is the threshold value.

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