Hi Bill,
I have written an NCL script to do exactly what you describe. I don't
know that I'd go so far as to call it a "best practice", but the technique
I found fairly speedy and not too ugly code-wise is to loop by hand
over the cells of the target grid using rcm2points() to do the
interpolation for each point separately. (The other approaches I looked
at either took forever or gave me results I had a hard time being sure
were structured correctly.) Here's the essence:
do j = 0,ny-1
do i = 0,nx-1
ipol = rcm2points(lat2d,lon2d,data,outlat(j,i),outlon(j,i),1)
outdata(:,j,i) = (/ipol/)
end do
end do
Cheers,
--Seth
---- Seth McGinnis Associate Scientist NARCCAP Data Manager ISSE / NCAR ---- >Message: 2 >Date: Wed, 8 Jul 2009 14:11:18 -0600 >From: "Capehart, William J" <William.Capehart_at_sdsmt.edu> >Subject: recommended practices for moving from one > curvilinear grid to another curvilinear grid >To: "ncl-talk_at_ucar.edu" <ncl-talk_at_ucar.edu> >Message-ID: <C67A5986.D657%wcapehar_at_sdsmt.edu> >Content-Type: text/plain; charset="iso-8859-1" > > >Hi All > >there are a number of functions in NCL to resample or interpolate between >one regular grid to another or from a curvilinear (e.g., RCM/WRF/NARR) into >rectilinear grids or vice versa but not much guidance on the "Regridding >Functions" page in the NCL documentation on how to go from one curvilinear >grid to another curvilinear gird. There a few multi-step approaches I can >see doing but I'd rather be able to do it in one "relatively painless" step >to avoid mangling the data more than needed. Are there any recommendations >on how to do that? > >Thanks Much >================================================================ >Bill Capehart <William.Capehart_at_sdsmt.edu> Associate Professor >Institute of Atmospheric Sciences Land Surface Processes >213 Mineral Industries Building Hydrometeorology >South Dakota School of Mines and Technology Ph: +1-605-394-1994 >501 East Saint Joseph Street Fax: +1-605-394-6061 >Rapid City, SD 57701-3995 Mobile: +1-605-484-5692 >=================== http://capehart.sdsmt.edu ================== > _______________________________________________ ncl-talk mailing list List instructions, subscriber options, unsubscribe: http://mailman.ucar.edu/mailman/listinfo/ncl-talkReceived on Wed Jul 08 2009 - 15:16:17 MDT
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