Re: wmstnm improvements

Yes, it will. If you have an immediate need for this capability,
please email me offline. If you can wait a few weeks, then that's great.

--Mary

On Jan 6, 2010, at 9:56 AM, Bolli Palmason wrote:

> Thank you Mr. Clare!
>
> Will this be included in the upcoming version (5.2.0)?
>
> Regards,
> Bolli
>
> On Mon, Jan 04, 2010 at 09:02:40PM -0700, Fred Clare wrote:
>> Bolli,
>>
>> I have added an option "VVC", settable by wmsetp, that will effect
>> plotting the raw SYNOP codes in station model plots. Do
>>
>> wmsetp("VVC",1)
>>
>> if you want to do this.
>>
>> Fred Clare
>>
>>
>>
>> On Dec 15, 2009, at 1:33 PM, Bolli Palmason wrote:
>>
>>>
>>> Thank you Mr. Clare for your response.
>>>
>>> In the WMO Guide on the Global Data-processing System:
>>>
>>> http://www.wmo.ch/pages/prog/www/DPS/Manual/WMO485.pdf
>>>
>>> In Volume I, Part II, Appendix II-4: GRAPHICAL REPRESENTATION OF
>>> DATA,
>>> ANALYSES AND FORECASTS (pages 49-63) is a detailed description of
>>> the
>>> surface plotting model (the SYNOP symbol) and there it reads on
>>> page 50:
>>>
>>> VV - Horizontal visibility at surface, the code figures are plotted.
>>>
>>> I can also point you to this German guide:
>>>
>>> http://www.4robert.de/synop/synop.html
>>>
>>> Norwegian weather page pointing to this guide:
>>>
>>> http://www.mir-co.net/wetter/wetterkartensymbole.htm
>>>
>>> We are also using other plotting packages and all of them plot the
>>> visibility as it is in the SYNOP code. I would think that since you
>>> are
>>> including the option of using the metric system (UNT 1) for your
>>> customers outside of the US, it would be better to follow the
>>> standard.
>>>
>>> Regarding the rain/snow dot size: it is not a showstopper, I'm
>>> plotting
>>> postscript and then converting to png for the web. I had to increase
>>> the
>>> size of the images to 1600x1200 points for the symbols to be easily
>>> distinguishable. You will maybe keep this in mind if later on
>>> symbols
>>> will be redigitized.
>>>
>>> Best regards,
>>> Bolli
>>>
>>>
>>> On Tue, Dec 15, 2009 at 01:09:01AM -0700, Fred Clare wrote:
>>>>
>>>> On Dec 13, 2009, at 6:26 AM, Bolli Palmason wrote:
>>>>
>>>>> Dear NCL users,
>>>>>
>>>>> thanks to NCAR for a very nice graphics package!
>>>>
>>>> Thanks for the comment.
>>>>>
>>>>> I'm using the wmstnm function to plot SYNOP data and there are two
>>>>> things that could improve (I'm using UNT 1 - metric):
>>>>>
>>>>> 1. The visibility should be the numbers from the SYNOP code, not
>>>>> translated to km. 70 in SYNOP code should be plotted as 70, not 20
>>>>> (km).
>>>>
>>>> In implementing wmstmn I encoded the data as per the SYNOP Data
>>>> Format
>>>> (FM-12) as described at:
>>>>
>>>> http://weather.unisys.com/wxp/Appendices/Formats/SYNOP.html
>>>>
>>>> which indicates visibility is encoded in km. What source for SYNOP
>>>> codes are you using? Since wmstnm has been in our package for over
>>>> fifteen years with the visibilities coded in km and yours is the
>>>> first
>>>> suggestion to code as per another scale, I am hesitant to change
>>>> the
>>>> code at this time. I could define a user-settable parameter that
>>>> would control how visibility is encoded. In the meantime, you
>>>> could
>>>> define a function that converts km to the SYNOP codes you want to
>>>> use--
>>>> this would not be precise, but it would be close.
>>>>>
>>>>> 2. The dots/stars for rain/snow should be bigger or different
>>>>> size, it
>>>>> is hard to see the difference.
>>>>
>>>> I can see that at small sizes there could be difficulty in
>>>> distinguishing these symbols. These symbols were digitized from
>>>> scaled
>>>> up symbols that appear in NOAA's publication "Explanation of the
>>>> Weather Map." Are the dots/stars for rain/snow the only ones you
>>>> find
>>>> that are causing confusion? Again, I am hesitant to redigitize
>>>> those
>>>> as to make them inconsistent with the sizes of dots and stars used
>>>> elsewhere, and redigitizing all of the dots and stars would be a
>>>> bit
>>>> of bother. Also, the spacings would have to be readjusted. What
>>>> sizes do you normally plot these symbols at and what is your output
>>>> device? Plotting the symbols to a Postscript file and printing
>>>> seems
>>>> to resolve the symbols fairly well for me. All of these characters
>>>> are drawn as lines and filled areas and not as raster images scaled
>>>> for device-specific resolutions; that could definitely cause
>>>> confusion
>>>> on lower-resolution output devices.
>>>>>
>>>>> Hope NCAR considers these changes, must be bothering others
>>>>> also :)
>>>>
>>>> You are the first to bring these issues up, but I can see your
>>>> point
>>>> and will file this for future reference.
>>>>
>>>> Thanks for your input.
>>>>
>>>> Fred Clare
>>>>
>>>>
>>>>
>>>>>
>>>>> Best regards,
>>>>> Bolli
>>>>> _______________________________________________
>>>>> ncl-talk mailing list
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>>>>
>>>
>>> --
>>> Bolli Palmason
>>> IT Department
>>> Icelandic Meteorological Office
>>> Tel. +354 5226103
>>> _______________________________________________
>>> ncl-talk mailing list
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>
> --
> Bolli Palmason
> IT Department
> Icelandic Meteorological Office
> Tel. +354 5226103
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

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Received on Wed Jan 6 16:48:59 2010