Hi Imran, If you can come up with a way to define your region with a variable that's 1 inside the region and 0 outside the region, then you can use a MASK to do analysis on data in that region. Here is an FAQ with some examples of this. http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/analysis/avg_integ_irreg.html Ansley IMRAN NADEEM wrote: Hi all, |