Re: [ferret_users] Filling in the blanks with interpolation

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Kek,
To locate the tools for filling that are included with Ferret, look up 
"filler, missing values" in the Users Guide index. The filling 
transformations let you specify the size of the averaging window, so you 
fill in only those points nearest to valid data.

Ansley

hengkek@nus.edu.sg wrote:

> Greetings
>
> I have a netcdf file of SSH over a geographic region.  When I plot it, 
> I see some "holes" (missing_values) which I want to fill in with 
> values interpolated from surrounding points.  Can I do this in 
> Ferret?  If yes, I'd be grateful for pointers.
>
> The following ascii picture illustrates the domain.
> "m" are the missing_value points that I want to fill in with 
> interpolated/extrapolated values.
> "o" are missing_value points I'll leave alone.
> "-" are points with data values.
> (I have another netcdf file with the "m" points with legitimate data; 
> this netcdf file is identical in dimensions to the 1st file.  I'm 
> guessing the answer has to do with making use of this 2nd file to 
> produce masks...)
>
> oooooooooom-----------m----
> ooooooom-----------mmm-----
> oooooommm----------------oo
> oooo-----------m-------oooo
> ooooooooooo----------oooooo
> ooooooooooo------------oooo
> oooooooooom-------mm-----oo
> oooooooooom----------------
>
>
> Thanks for any assistance.
>
> -Kek
> Physical Oceanography
> Singapore