Hello all, First of all, I am a newcomer, so maybe the answer to my question is trivial, but I just couldn´t figure it out so far. I am trying to calculate the experimental semi variogram... there is a built-in code in ENVI (under "Spatial Statistics" > "Compute Global Spatial Statistics"). Is it somehow possible to incorporate the underlying code in IDL, like it can be done with the envi doit routines? Thanks, Fabian