Read XieArkin's precipitation data by ddf file

[Don Hooper]

DDFs that reference NetCDFs aren't opened with sdfopen; they are opened
via the xdfopen command.

-Hoop
> From owner-gradsusr at LIST.CINECA.IT  Wed Jan 12 09:26:54 2005
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> Date: Wed, 12 Jan 2005 16:26:07 +0100
> Reply-To: GRADSUSR at LIST.CINECA.IT
> Sender: GRADSUSR at LIST.CINECA.IT
> From: Ji-Yun SEO <joy0826 at PUSAN.AC.KR>
> Subject: Read XieArkin's precipitation data by ddf file
> To: GRADSUSR at LIST.CINECA.IT
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> Hi ^^ HAPPY NEW YEAR!!
>
> I've been trying to draw a XieArkin's precipitation data netcdf file.
> when i downloaded it there is a referencing page to read these data using
> a Grads .ddf file
> Unfortunately, i coulnd't read it properly although i followed the
> direction.
> this's my prec.ddf file
>
> DSET ^XieArkin-1979-2002.nc
> *UNDEF 1E36
> UNDEF -999.f
> XDEF lon 144 Linear 0.0 2.5
> YDEF lat 73 Linear -90. 2.5
> TDEF time 288 Linear Jan1979 1mo
> VARS 1
> PRC2 => prc2 1 99 Precipitation
> ENDVARS
>
> i did gradsnc ; sdfopen prec.ddf
> but this error message comes out
>
> scanning self-describing file:  prec.ddf
> prec.ddf does not exist or is not a netCDF file.
>
> Couldn't ingest SDF metadata.
> If this was an HDF-SDS file, try gradshdf.
>
> please help me
> i would be grateful if i get any advice from you guys!!!
>