[gradsusr] ctl file for curvillinear data

[Jennifer Adams]

That message from the archive still holds true. However, there is some stand-alone code from the ESMF group that may be useful for providing the interpolation points for converting a curvilinear (or other) grid to a rectilinear lat/lon grid that GrADS can handle. It takes two netcdf files as args, and outputs a third that could be used to create a GrADS PDEF file. I plan to take a look and see if it could be useful, but haven't had a chance yet. Just another option to try...
--Jennifer



----- Original Message -----
From: "James T. Potemra" <jimp at hawaii.edu>
To: "GrADS Users Forum" <gradsusr at gradsusr.org>
Sent: Wednesday, May 18, 2011 6:01:51 PM
Subject: Re: [gradsusr] ctl file for curvillinear data

Just a follow-up; from the GrADS archive:
http://gradsusr.org/pipermail/gradsusr/2011-March/012841.html

On 5/18/11 11:46 AM, Roberto Mera wrote:
> Users,
>
> I've been working with data from the regCPDN project:
> http://climateprediction.net/weatherathome/western_us
> This data is in curvillinear coordinates and when I run cdo griddes I get:
>
> gridtype  = curvilinear
> gridsize  = 12870
> xname     = global_longitude0
> xlongname = longitude
> xunits    = degrees_east
> yname     = global_latitude0
> ylongname = latitude
> yunits    = degrees_north
> xsize     = 110
> ysize     = 117
>
> The grid is specific numbers for each lat,lon (i,j). It's a 24km grid at
> 0.22 deg in its native coordinate system. Using XDEF in either levels or
> linear distorts the image. How can I approach this with the PDEF function?
>
> I'm running grads version v2.0.a9.oga.1 little-endian readline printim
> grib2 netcdf hdf4-sds hdf5 opendap-grids,stn athena geotiff shapefile
>
> Thanks,
>
> Robert
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