Re: station wind vector over a map again

This is great Fred!

Fred Clare wrote:
>
> On Dec 18, 2007, at 5:35 AM, Dorita Rostkier-Edelstein wrote:
>
>> Hi
>>
>> I want to use wmlabs to create an arrow and use it as a wind vector on
>> a map at station locations.
>
> Using the arrows from wmlabs for this is not a good idea for several
> reasons:
>
> 1.) The coordinate specification for the arrows is for the arrow head
> and not the base of the tail as desired.
> 2.) The entire arrows are scaled by the specified size whereas it is
> preferable to be able to scale the tail and arrow head
> independently.
> 3.) You will have to make the appropriate direction adjustments for
> plotting over maps.
>
> I have just implemented a limited vector capability at the low level for
> normal vector plotting and for plotting over maps. I
> hope to get this into NCL by the end of the week. This offers control
> over arrow head size, line thickness, color, and angle between arrow head
> and tail. Also you can plot an informational label. See the attached
> plots
> for examples. This functionality is only a temporary solution until such
> can be implemented in the NCL vector plotting functions (see:
>
> http://www.ncl.ucar.edu/Applications/vector.shtml
>
> for examples). The full set of vector resources described at:
>
> http://www.ncl.ucar.edu/Applications/vector.shtml
>
> will be available at that time.
>
> Fred Clare
>
>
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>
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>
>
>
>
>
>>
>> I used gsn_add_text to add the stations names for instance.
>> What gsn_add* function will allow me to put the wmlabs I created at
>> the same place?
>>
>> Thanks.
>>
>> Dorita
>>
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