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I got the following Raster, in which I would like to erase the rocks that appear on it.

I applied Gauss filter and got rid of small rocks (as noise), but which tool should I used to erase bigger accumulation of rocks, some sort of flattening the area based in the surroundings.

Trying to Flattening isolated green areas

  • A DTM with the buildings removed is called a DEM, perhaps you can find one of those for your area of interest. Or look into standard methods used for converting a DTM into a DEM. – csk Aug 27 at 17:56

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