Obs! There is discontinuity in the Contour made by Ferret , due to the smoothing, please see the attached graph. How I can treat this discontinuity in the contour? I did the following smoothing: h_on_p[z=850,i=@sbx:5,j=@sbx:5] tmp_on_p[z=850,i=@sbx:5,j=@sbx:5] Thanks Ashraf ''~`` ( o o ) +------------------.oooO--(_)--Oooo.------------------+ | | | Ashraf Saber Zakey | | Department of Chemistry | | Atmospheric Science group | | Universty of Gothenburg | | SE 412 96 Gothenbrg | | Sweden | | e-mail: zakey@chem.gu.se | | ashraf_saber123@yahoo.com | | | | .oooO | | ( ) Oooo. | +---------------------\ (----( )--------------------+ \_) ) / (_/ ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs