Re: Interpolating between two curvilinear grids.

Yes ... "the weights file only depends on the properties of the two
grids". The "projection" and "variable" are not used.

Once the weight file is generated the regridding can be very quick.

On 09/26/2012 09:42 AM, Manisha Ganeshan wrote:
> Dear Dennis,
>
> Thank you very much for pointing me to this new development. I think its
> a very useful and well-written function. I just want to reconfirm that
> the weights file only depends on the properties of the two grids
> (dimensions, lat/lon and projection) and not on the data/variable to be
> plotted? Since I am using pre-defined NCEP grids to regrid daily
> meteorological data, it would save me a lot of time if I use the same
> weights file for regridding say, daily precipitation from multiple
> source files.
>
> Thanks,
> Nisha
>
> On Tue, Sep 25, 2012 at 3:27 PM, Dennis Shea <shea@ucar.edu
> <mailto:shea@ucar.edu>> wrote:
>
> There has been a lot of ncl-talk traffic about the ESMF regrid
> functionality that is in 6.1.0-beta. See
>
> See: http://www.ncl.ucar.edu/__Applications/
> <http://www.ncl.ucar.edu/Applications/>
>
> Under 'Data Analysis', click 'ESMF Regridding'
>
> There are numerous examples of regridding one curvilinear
> grid to another.
>
> The basic steps of NCL/ESMF regridding involve:
>
> Reading or generating the "source" grid.
> Reading or generating the "destination" grid.
> Creating special NetCDF files that describe these two grids.
> *Generating a NetCDF file that contains the weights.
> Applying the weights to data on the source grid,
> to interpolate the data to the destination grid.
> Copying over any metadata to the newly regridded data.
>
> *This is the most important step. Once you have a weights file, you
> can skip steps #1-4 if you are interpolating data on the same grids.
>
>
>
>
> On 09/25/2012 01:09 PM, Manisha Ganeshan wrote:
>
> Hi,
>
> I have data on a polar stereographic projection, and I wish to
> remap it
> with maximum accuracy onto a lambert conformal projection. Both
> grids
> are roughly of the same resolution (5km and 4.7km). Can someone
> suggest
> the best way to do this without introducing too many spatial errors?
>
> Thanks,
> Nisha
>
>
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Received on Wed Sep 26 11:42:02 2012