antonv wrote:
> Hi Jeff,
>
> Here is the whole script:
> http://old.nabble.com/file/p27826457/_test_shiftgrid.py _test_shiftgrid.py
> And here are the grib data files:
> http://socalscubainfo.com/downloads/GRIB2_files.zip
>
> Also, if there is not too much to ask, is there a sample anywhere that shows
> how to use shiftgrid for a mercator projection? If you look at the script, I
> was initially trying to make the images using the mercator projection (there
> is a commented basemap function there) but it would display just the data
> starting from the origin. I was wondering how would I be able to display
> let's say the whole globe but shift the grid 180 so that great britain would
> be in the center of the map rather than being cut at the edge.
>
> Thanks,
> Anton
>
Anton: You weren't updating the lons and lats to be consistent with the
shifted grid. I changed the lines
#z, lons[i] = shiftgrid(180.0, z, lons[i], start=False,
cyclic=360.0)
#zq, lons_a[i] = shiftgrid(180.0, zq, lons_a[i], start=False,
cyclic=360.0)
in your script to
lons1 = lons[0,:]
z, lonsnew = shiftgrid(180.0, z, lons1, start=False)
zq, lonsnew = shiftgrid(180.0, zq, lons1, start=False)
lons, lonsnew = shiftgrid(180.0, lons, lons1, start=False)
lats, lonsnew = shiftgrid(180.0, lats, lons1, start=False)
and it works fine.
-Jeff
>
>
>
> Jeff Whitaker wrote:
>
>> antonv wrote:
>>
>>> Hi Jeff,
>>>
>>> Thanks for the quick reply! I've updated to the latest shiftgrid and now
>>> I
>>> get the chart :D
>>> I still have a small issue as there is a half degree sliver missing from
>>> the
>>> mapping at the greenwich meridian. Any idea how to solve that issue?
>>>
>>> Here is an image showing that (above england):
>>> http://old.nabble.com/file/p27824785/Global-HTSGW_DIRPW-0.png
>>>
>>> Thanks,
>>> Anton
>>>
>>>
>> Anton: Looks like the values at the Greenwich meridian got messed up
>> somehow. Can you post your script somewhere so I can try it out?
>>
>> -Jeff
>>
>>> Jeff Whitaker wrote:
>>>
>>>
>>>> antonv wrote:
>>>>
>>>>
>>>>> Hi all,
>>>>>
>>>>> I am getting a 'cyclic point not included' error using shiftgrid on a
>>>>> grib
>>>>> file from NOAA. I've checked and it seems that the file has the lons
>>>>> from
>>>>> 0
>>>>> to 359.5 every .5 degree but I get that error whenever I try to run
>>>>> this.
>>>>>
>>>>> What I need to achieve is to shift the grid from 0 / 360 to -180 / 180
>>>>> so
>>>>> that I can create a map over Great Britain. I am using a Cassini
>>>>> projection.
>>>>>
>>>>>
>>>>>
>>>> Anton: You can add the wraparound, or cyclic point using the addcyclic
>>>> function. Or, you can update to the latest svn version of basemap which
>>>> does not have this restriction.
>>>>
>>>>
>>>> -Jeff
>>>>
>>>>
>>>> --
>>>> Jeffrey S. Whitaker Phone : (303)497-6313
>>>> Meteorologist FAX : (303)497-6449
>>>> NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov
>>>> 325 Broadway Office : Skaggs Research Cntr 1D-113
>>>> Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Download Intel® Parallel Studio Eval
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>>>
>>>
>> --
>> Jeffrey S. Whitaker Phone : (303)497-6313
>> Meteorologist FAX : (303)497-6449
>> NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov
>> 325 Broadway Office : Skaggs Research Cntr 1D-113
>> Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
>>
>>
>> ------------------------------------------------------------------------------
>> Download Intel® Parallel Studio Eval
>> Try the new software tools for yourself. Speed compiling, find bugs
>> proactively, and fine-tune applications for parallel performance.
>> See why Intel Parallel Studio got high marks during beta.
>> http://p.sf.net/sfu/intel-sw-dev
>> _______________________________________________
>> Matplotlib-users mailing list
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>>
>>
>
>
--
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov
325 Broadway Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
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