Re: interpolate data from observation stations to regular grid box

> I would like to interpolate some data from observation stations to regular
> grid box(2x2) and then plot it as contour lines. I found a function called
> "cssgrid" to do interpolation. But for those grid boxes which have no data
> nearby, I rather have missing value other than doing interpolation (It gave
> me very unreasonable data). Is there any way to put distance restriction for
> interpolation? Or NCL provides other functions which can do this?
>
> Attached is a plot with polymarkers on observation stations.

Try "triple2grid"

http://www.ncl.ucar.edu/Document/Functions/Built-in/triple2grid.shtml

example:

    opt = True
    opt_at_domain = 2.0
   ;opt_at_strict = True
    grid = triple2grid(xlon,ylat,zVal, lon,lat, opt)

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Received on Thu Dec 29 2005 - 18:09:03 MST