I have been attempting to perform a Watershed analysis and can't quite get past the Fill tool. I am working with a clipped DEM of 20cm resolution, see attached image with random selected points of elevation. There are two rather large ponds on the site and so I attempted to use a Z limit of 1079 as the ponds are all under 1079m while everything else is above. (not 100% sure if I am using this option correctly).
However as can be seen no the AfterFill image almost the entire site obtains values of 1083.0378.
Why is this occurring this way?