Re: [netcdfgroup] ncdump, then ncgen

• To: "HAVENER, KEVIN F GS-12 USAF ACC 14 WS/WXED" <kevin.havener@xxxxxxxxx>
• Subject: Re: [netcdfgroup] ncdump, then ncgen
• From: Dave Allured - NOAA Affiliate <dave.allured@xxxxxxxx>
• Date: Mon, 23 Jan 2017 12:27:31 -0700

Ncdump followed by ncgen generally works fine for me.  Try using plain
ncgen, rather than ncgen3.  Also try explicitly specifying the ncgen option
to select netcdf-3 file format.  I recall that the default output format
changed occasionally with different versions of ncgen, so that might be
your problem.

Also remember to use -p9,17 with ncdump, if you want to preserve full
precision from the original numeric values.  Also use the -s option with
ncdump, to get the correct special metadata for all advanced netcdf formats
(64-bit, netcdf-4, and netcdf4-classic).

--Dave


On Mon, Jan 23, 2017 at 6:56 AM, HAVENER, KEVIN F GS-12 USAF ACC 14 WS/WXED
<kevin.havener@xxxxxxxxx> wrote:

> If I understand correctly, I should be able to ncdump a netcdf to text
> (CDL) then ncgen it back to a valid netcdf file.  I tried this on a
> seemingly valid netcdf3 file and ncgen3'd it, but the new file was not in
> any way like the old one.  In fact, it didn't even seem to be a valid
> netcdf3 any longer--the file magic was incorrect.  Did I completely
> misunderstand the capabilities of the two programs?  Or did I just not
> understand how to do the process correctly?
>
> Kevin Havener, DAFC, 14WS/WXED
>

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