[gradsusr] Problem posting nps grib2 data in grads

[Wesley Ebisuzaki]

Ron,

g2ctl can only handle grib files with one grid.  So you will have to
separate the grids into their own files.

 wgrib2  reg_00_024.grib2 -grid -one_line | grep  "493 x 399" | wgrib2 -i
reg_00_024.grib2 -grib grid1
 wgrib2  reg_00_024.grib2 -grid -one_line | grep  -v "493 x 399" | wgrib2
-i reg_00_024.grib2 -grib grid2

However, once you made your ctl files, you can modify the "dset" to point
to the original file.
gribmap is smart enough to handle grib files with different grids.

           Wesley



On Fri, Jun 8, 2012 at 4:14 PM, Goodson,Ron [Edm] <Ron.Goodson at ec.gc.ca>wrote:

> **
> Hi
>
> I already mentioned to Lewis (we work for the same organization) that his
> problem is that his grib-file contains 2 different grids (depending upon
> variable).
>
> I answer him to the entire list, though, in case somebody knows how to
> handle this situation (other than breaking the file into two files .. each
> with their own grid).
>
> tks
>
> ron
>
>  ------------------------------
> *From:* gradsusr-bounces at gradsusr.org [mailto:
> gradsusr-bounces at gradsusr.org] *On Behalf Of *Poulin,Lewis [CMC]
> *Sent:* June 8, 2012 9:40 AM
> *To:* gradsusr at gradsusr.org
> *Subject:* [gradsusr] Problem posting nps grib2 data in grads
>
>  Hello
>
> I am having difficulty in posting in GrADS my grib2 data on a north polar
> stereographic grid
>
> I placed all relevent files and information in the directory at:
> *http://collaboration.cmc.ec.gc.ca/cmc/CMOI/grads/regional/*<http://collaboration.cmc.ec.gc.ca/cmc/CMOI/grads/regional/>
>
> From this site you can see my grib2 file: called reg_00_024.grib2
>
> I am using grads-2.0.a5
>
> I made the following ctl and idx files (available that above site)
>   reg_00_024.grib2.ctl
>   reg_00_024.grib2.idx
>
> When I run the following simple script:
>
> *start sample script
>
> 'open reg_00_024.grib2.ctl'
>
> 'clear'
> 'set lon 230 310'
> 'set lat 30 70'
> 'set mpvals 235 305 35 65'
> 'set mproj nps'
>
> 'set lev 850'
> 'd HGTprs'
>
> 'set lev 500'
> 'd TMPprs'
>
> *end sample script
>
>
> I get the following messages:
>
> Notice: Implied interpolation for file reg_00_024.grib2.ctl
>  Interpolation will be performed on any data displayed from this file
> Cannot contour grid - all undefined values
> Cannot contour grid - all undefined values
>
>
> I cannot get my data to display.
>
> Thanks in advance for your suggestions and assistance.
>
> Lewis
>
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> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
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