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How to select a continuous area with raster

Question asked by gamos2014 on Mar 22, 2017
Latest reply on Mar 22, 2017 by Dan_Patterson

Hi all,  


I have created a slope raster from a DEM and am trying to select only contiguous areas of slope less than 10 degrees. I have used the raster calculator to select that subset of slopes, but I only want to include areas that are contiguous (i.e.   no gaps between pixels, as seen in the one linear raster area below, which is a road). I would also like to rule out areas of the slope raster that  have significant pockets of slope that's steeper than 10 degrees (as seen in the blobs on both sides of the road).

Is there a focal or zonal function that can do this?