I would like to use raster calculator in QGIS to convert all values <= -500 to NA values. How can I do that?


Well, there is a trick for using if/else in calculator. It can be used for your question. Type following code into raster calculation expression:

("gurbeyli@1"<=-500)*-9999 + ("gurbeyli@1">-500)*"gurbeyli@1"

And of course "gurbeyli@1" is my raster band name, you should use yours. In this example, -9999 was used as NA value: enter image description here

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