[ncl-talk] horizontal interpolation

[Adam Phillips]

Hi Basit,
I would suggest setting cnFillMode = "RasterFill" to see exactly where data
is present. The default setting for cnFillMode ("AreaFill") will not
necessarily show a grid box with data if there is missing data present
anywhere around the grid box. This is the case here.

If you are set on interpolating, you can try to use the poisson_grid_fill
function:
http://www.ncl.ucar.edu/Document/Functions/Built-in/poisson_grid_fill.shtml

Note that this function will fill in _all_ areas with data. It would then
be up to you to mask the land out after using poisson_grid_fill.

Hope that helps.. If you have any further questions please respond to
ncl-talk.
Adam


On Mon, Feb 16, 2015 at 3:36 AM, BasitAli Khan <BasitAli.Khan at kaust.edu.sa>
wrote:

>   Hi there,
>
>  I want to plot  SST from ECMWF-Era-Interim 0.75 x 0.75 degree data. The
> SST field in this dataset is land masked that is all the land points are
> 'missing values' . However, due to coarse resolution, there are white
> spaces along the shorelines (please see the attached figure). I want to
> interpolate  SST up to shorelines so that no white spaces are shown in the
> plot. I wonder how can i do this.
> Any help would be greatly appreciated.
>
>  Regards,
>   Basit
>
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-- 
Adam Phillips
Associate Scientist,  Climate and Global Dynamics Division, NCAR
www.cgd.ucar.edu/staff/asphilli/   303-497-1726

<http://www.cgd.ucar.edu/staff/asphilli>
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