Cropping specific areas (not rectangle)

At the moment I have two volcanoes in this image but I only want the top one. Is there any other way to crop it other than using a subset? A rectangular subset would include a lot of pixels that are of no interest and would mess up my statistical analysis. I also want to finally create a 3D DEM.


You want to create a mask of just the pixels you want. You could do this with a polygon and band maths using the name of the polygon geometry or with the land/sea mask operator.
I would still use subset to clip the bounding rectangle.

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