Re: [ferret_users] Interpolating Irregularly Spaced Data to Curvilinear Grid

[Stephen Guimond <sguimond@xxxxxxx>]

Ansley,

Thank you for your reply.  What I did was interpolated to each cylindrical grid point using CURV_TO_RECT by looping over each point.  This takes much too long so I compared to the default method (curv_to_rect then rect_to_curv).  The differences were pretty small...For a temperature of ~300 K, differences of ~0.5 K, much less than 1%.

Regards,
Steve

----- Original Message -----
From: Ansley Manke <Ansley.B.Manke@xxxxxxxx>
Date: Monday, November 24, 2008 12:26 pm
Subject: Re: [ferret_users] Interpolating Irregularly Spaced Data to Curvilinear Grid
To: guimond@xxxxxxxxxxxxx
Cc: oar.pmel.ferret_users@xxxxxxxx

> Hi Stephen,
> No, there is no other path to get what you want. We're looking into 
> more 
> regridding options, and may have new methods in future releases, 
> but for 
> now, you need to regrid to a regular grid, and then use the 
> RECT_TO_CURV 
> functions. If your initial grid is a rectilinear irregular grid, 
> you can 
> just use a standard Ferret regridding operaion to go to a 
> regularly-spaced rectilienar grid and then call the RECT_TO_CURV 
> function.
> Ansley
> 
> Stephen Guimond wrote:
> > Ferreters,
> >
> > I have irregularly spaced data that I want to put on a 
> cylindrical grid.  I know I can do this calling CURV_TO_RECT and 
> then RECT_TO_CURV functions, but is there a way I can skip going 
> through the RECT interpolation and go straight to CURV?  I'm not 
> sure how much error is introduced with the extra interpolation to 
> RECT and would like to limit to just one interpolation.
> >
> > Any ideas?
> >
> > Steve  
> >
> > =======================================================
> > Stephen R. Guimond
> > Graduate Research Assistant
> > Florida State University
> > Center for Ocean-Atmospheric Prediction Studies (COAPS)
> > =======================================================
> >   
> 
> 
> 

=======================================================
Stephen R. Guimond
Graduate Research Assistant
Florida State University
Center for Ocean-Atmospheric Prediction Studies (COAPS)
=======================================================