[gradsusr] "Cannot contour grid - all undefined values" with some grib2-files in OpenGrADS

[Wesley Ebisuzaki - NOAA Federal]

Tom,

   Once you include the grib and ctl files, it is possible to figure
out the problem.

You are using a rotated lat-lon grid which I hadn't  seen
until last month.  G2ctl needed a minor update to get it working,
so get the October 20th version from

    ftp://ftp.cpc.ncep.noaa.gov/wd51we/g2ctl/g2ctl

perl g2ctl -0 EDP_MAX_LUIR_201311130000_f001_l0260.gb2 >test.ctl
gribmap -0 -i test.ctl

Wesley

On Tue, Nov 11, 2014 at 8:49 AM, <tom.kalkov at web.de> wrote:

> Hi,
>
> I want to visualize the Grib2-File
> EDP_MAX_LUIR_201311130000_f001_l0260.gb2 (see attachment)
> and get the error "Cannot contour grid - all undefined values".
>
> I am using Windows 7 with the following software:
> - OpenGrADS 2.0.2 win32
> - Strawberry Perl 5.20.1.1 32bit
>
> My ctl-file is created with the following command:
> perl g2ctl -0 EDP_MAX_LUIR_201311130000_f001_l0260.gb2 >
> EDP_MAX_LUIR_201311130000_f001_l0260.gb2.ctl
>
> Here, the first strange thing happened: g2ctl generated an ctl-file with
> the variable-name "var019225hy0_0". As OpenGrADS can't handle this variable
> name, I renamed the variable to "test". As a result, I got the ctl-file
> EDP_MAX_LUIR_201311130000_f001_l0260.gb2.ctl (see attachment)
>
> Now I used the following command to get the index-file:
> gribmap -v -0 -i EDP_MAX_LUIR_201311130000_f001_l0260.gb2.ctl
> The index-file is also attached.
>
> With the command
> grads -l -c "open EDP_MAX_LUIR_201311130000_f001_l0260.gb2.ctl"
> and
> display test
> I was able to open the file in OpenGrADS. I can see an empty map, but
> nothing more.
>
> I can visualize the Grib2-File from
>
> http://www.nomad5.ncep.noaa.gov:9090/pub/data/nccf/com/gfs/prod/gdas.20141017/gdas1.t06z.engicegrb.grib2
> with the above commands, but not my own Grib2-File. My problem is also,
> that I don't know what is in the Grib2-File. It is a file from our customer
> and it's my task to visualize it. Unfortunately even our customer can't
> give me a visualisation of the file.
>
> Hope you can help me.
>
> Kind regards
>
> Tom Kalkov
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>
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