Re: interpolate in rotated coordinate

[Ansley Manke <Ansley.B.Manke@xxxxxxxx>]

Hi Gnzeng,
We are looking into methods for regridding and interpolating
on rotated or curvilinear grids.  Ferret can make plots of
such variables (see references to curvlilinear coordinates in
the Users Guide) but does not now have the capability to do
analysis with this kind of data.  We plan to provide this in the
future, however.

In the meantime, if you have code in Fortran or C which makes
the calculations, it should be possible to implement that code
as a Ferret External Function.

Ansley Manke

gnzeng wrote:

> dear ferret_users
>
>         Has there anybody met the problem on interpolating in rotated coordinate?
>         I have a  regular gridded data file A.cdf ,which area is a  rectangle A1 and is composed of three variables lonA,latA,DepA .
>
>         At the same time , i have a data file named B.dat, which covers  a rotated rectangle B1 and consists of two variables lonB,latB,supposing the rotated angle is rotB=30 degree.
>
>         B1 was contained in A1, so i should interpolate the responding depB of the B1 grid, but as a freshman to Ferret, i still don't know how can i get it, could you do me a favor to help solve this problem ?
>
> thanks very much.
> yours sincerely
>
> gnzeng　　　　　　　　
> 2003-09-16
>
>
>
> gnzeng
> led_rs@scsio.ac.cn
> 2003-09-16

--
Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA