grads xdfopen netcdf file with template option

[Youhua Tang]

Thank you for your information, Diane. I tried your method. However, my
netcdf file is a non-COARDS-compliant file. Do you know how to convert
coordinate name using "open"? For example, the x-coordinate in my netcdf
file is "COL", and I can use "xdef COL 97 linear 1. 1." with "xdfopen",
but how I can make it work using "open".


Youhua

On Wed, 5 Jan 2005, Diane Stokes wrote:

> Dear Youhua,
>
> The new "dtype netcdf" in 1.9b3 has done the trick for me for netcdf
> files with multiple time steps.  See:
>
> http://grads.iges.org/grads/gadoc/descriptorfile.html#DTYPE
>
> You'd then use "open" rather than "xdfopen".
>
>      Good Luck.
>        Diane
>
>
> Youhua Tang wrote:
>
> > Hello, All:
> >
> > I found that current version of grads do not well handle
> > the netcdf file with template option. When I use xdfopen to open
> > the ddf file as below
> >
> > dset ^SOUT.%m2-%d2-00.nc
> > title 3D gaseous species
> > undef  -99999.0
> > options template
> > xdef COL 97 linear 1. 1.
> > ydef ROW 62 linear 1. 1.
> > zdef LAY 21 levels 7.25 25.40 54.5117 109.328 219.887 406.969 675.054
> > 990.77 135
> > 8.73 1828.5 2368.88 2942.16 3553.04 4207.36 4912.52 5678.06 6516.63
> > 7527.75 8868
> > .97 10717.2 13153.4
> > * in GMT
> > tdef TSTEP 377 linear 00Z01JUL2004 3hr
> > vars 1
> > SO2=>so2 21 99 SO2 (ppbv)
> > endvars
> >
> > The grads-1.8s111 has "Segmentation fault" (my linux machine uses
> > RedHat 7.3). The grads-1.9beta3 is "slightly" better as it can finish
> > 'xdfopen', but "Segmentation fault" appeared again when I perform further
> > operation, like 'd ave(so2,t=1,t=300)'. I found that only
> > grads-1.7beta9 can handle all the issues, but this old version lacks of
> > some useful math functions. Does anybody know how to
> > solve this problem?
> >
> > Thanks a lot
> >
> >
> > Youhua Tang
> >
>
> --
> Diane Stokes
> Environmental Modeling Center
> National Weather Service/NOAA
>

----------------------------------------------------
Youhua Tang
Center for Global & Regional Environmental Research
University of Iowa
402 IATL
Iowa City, IA 52242

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