[gradsusr] Eurocentric global map
Andrew Friedman
andfried at berkeley.edu
Tue Nov 19 12:53:41 EST 2013
Following up: Try moving the command ‘set lon -180 180’ to near the top of your script, right after opening the file.
On Nov 19, 2013, at 9:27 AM, Charles Seman - NOAA Federal <charles.seman at noaa.gov> wrote:
> Jim, Cara,
>
> I just tried plotting the variable *defined* for lon = (0,360) for lon =
> (180,540), and now the *right* half of the map is missing. It appears
> that *defined* variables are only valid on the domain for which they are
> defined, while *dataset* variables can be plotted for domains outside of
> the domain specified in the metadata (or data descriptor file).
> Apparently, GrADS knows how to "wrap" in the longitude direction for a
> dataset variable, but does not do this for a defined variable...
>
> Can you try defining the variable of interest for lon = (-180,180) or as
> Alan suggested lon = (-170,190), or whatever domain on which you wish to
> plot it? Another alternative would be to write out the variable defined
> on lon = (0,360) to a dataset, open that dataset, and work with that
> dataset variable...
>
> Hope this helps,
> Chuck
>
> On 11/19/2013 11:22 AM, James T. Potemra wrote:
>> Cara:
>>
>> Can you try 'set lon 180 540'? This should work if your longitude
>> values are continuous.
>>
>> Jim
>> On 11/19/13 5:44 AM, Cara Duckworth wrote:
>>> Hi Chuck,
>>>
>>> Thanks for your response. Yes, I just checked: lon = 0,360.
>>>
>>> Is there a way that I can change this so that I can plot the global map from lon -180 to 180 (with Europe in the middle)?
>>> When I plot it at lon=0,360, the map is fine but America is in the centre and I need Europe in the centre.
>>>
>>> Best,
>>> Cara
>>>
>>> On 19 Nov 2013, at 15:15, Charles Seman - NOAA Federal <charles.seman at noaa.gov> wrote:
>>>
>>>> Cara,
>>>>
>>>> Check to see if the variable you're trying to plot has been defined
>>>> locally in GrADS and what the longitude range is for it. I was able to
>>>> replicate the issue by defining a local GrADS variable for lon = (0,360)
>>>> and then when displaying it for lon = (-180,180) the left half was missing.
>>>>
>>>> Hope this helps,
>>>> Chuck
>>>>
>>>> On 11/19/2013 09:33 AM, Cara Duckworth wrote:
>>>>> Thanks Alan and Chris,
>>>>>
>>>>> I'm still having troubles plotting the map.
>>>>> When I use "set lon -180 180", one half of the plot is missing (see
>>>>> image attached)
>>>>>
>>>>> Without this instruction the map is fine (with all data displayed),
>>>>> though Europe is not in the centre.
>>>>> Any ideas as to what I have done wrong?
>>>>>
>>>>> Best,
>>>>> Cara
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 19 Nov 2013, at 13:25, Bill Reilly <bill_reilly at compuserve.com
>>>>> <mailto:bill_reilly at compuserve.com>> wrote:
>>>>>
>>>>>> Alan:
>>>>>>
>>>>>> I think you mean:
>>>>>>
>>>>>> set lon -180 180
>>>>>>
>>>>>> --
>>>>>>
>>>>>> Bill Reilly
>>>>>> www.passageweather.com <http://www.passageweather.com>
>>>>>>
>>>>>> On 11/19/2013 1:30 PM, Alan Robock wrote:
>>>>>>> Dear Cara
>>>>>>>
>>>>>>> set lat -180 180
>>>>>>>
>>>>>>> or if you don't want to split Alaska:
>>>>>>>
>>>>>>> set lat -170 190
>>>>>>> Alan Robock
>>>>>>>
>>>>>>> Alan Robock, Distinguished Professor
>>>>>>> Editor, Reviews of Geophysics
>>>>>>> Director, Meteorology Undergraduate Program
>>>>>>> Department of Environmental Sciences Phone: +1-848-932-5751
>>>>>>> Rutgers University Fax: +1-732-932-8644
>>>>>>> 14 College Farm Road E-mail:robock at envsci.rutgers.edu
>>>>>>> New Brunswick, NJ 08901-8551 USAhttp://envsci.rutgers.edu/~robock
>>>>>>> http://twitter.com/AlanRobock
>>>>>>> Watch my 18 min TEDx talk athttp://www.youtube.com/watch?v=qsrEk1oZ-54
>>>>>>>
>>>>>>> On 11/19/2013 6:54 AM, Cara Duckworth wrote:
>>>>>>>> Dear users,
>>>>>>>>
>>>>>>>> I need to plot a global map, which is centred on the Prime Meridian
>>>>>>>> (i.e. a Eurocentric map).
>>>>>>>> Currently, the Prime Meridian is at either edge of my plot. How do I
>>>>>>>> change this?
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> Cara
>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>> --
>>>>
>>>> Please note that Charles.Seman at noaa.gov should be considered my NOAA
>>>> email address, not cjs at gfdl.noaa.gov.
>>>>
>>>> ********************************************************************
>>>> Charles Seman Charles.Seman at noaa.gov
>>>> U.S. Department of Commerce / NOAA / OAR
>>>> Geophysical Fluid Dynamics Laboratory voice: (609) 452-6547
>>>> 201 Forrestal Road fax: (609) 987-5063
>>>> Princeton, NJ 08540-6649 http://www.gfdl.noaa.gov/~cjs/
>>>> ********************************************************************
>>>>
>>>> "The contents of this message are mine personally and do not reflect any
>>>> official or unofficial position of the United States Federal Government,
>>>> the United States Department of Commerce, or NOAA."
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>
> --
>
> Please note that Charles.Seman at noaa.gov should be considered my NOAA
> email address, not cjs at gfdl.noaa.gov.
>
> ********************************************************************
> Charles Seman Charles.Seman at noaa.gov
> U.S. Department of Commerce / NOAA / OAR
> Geophysical Fluid Dynamics Laboratory voice: (609) 452-6547
> 201 Forrestal Road fax: (609) 987-5063
> Princeton, NJ 08540-6649 http://www.gfdl.noaa.gov/~cjs/
> ********************************************************************
>
> "The contents of this message are mine personally and do not reflect any
> official or unofficial position of the United States Federal Government,
> the United States Department of Commerce, or NOAA."
> _______________________________________________
> gradsusr mailing list
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