Re: Drawing wind barbs on a map

Hi,

Jimmy is correct. The "wmbarb" and "wmbarbmap" routines draw the wind
barbs
right when they are called, and they are not attached to the map.
Hence, if
you have gsnMaximize set, the map will get resized, but the wind
barbs won't.

This is an unfortunate limitation of these routines. We do have it in
our "to do"
list to add the capability to generate wind barbs that you can attach
to a map.

If you are able to get your wind barb data into 2D arrays, then you
can use the
vector plotting routines with "vcGlyphStyle" set to "WindBarb".

See: http://www.ncl.ucar.edu/Applications/barb.shtml

--Mary

On Mar 3, 2010, at 6:26 PM, Correia, James wrote:

> Hi-
> Updated:
> I think the issue is that wmbarbmap needs to be associated with the
> gsn_csm_contour_map call. However, when I change that I have to
> turn off
> gsnMaximize to get it to fit the map, but it still doesn't like to be
> paneled. So I guess I need to use the vpXF and vpYF and associated
> resources.
>
> jimmyc
>
>
> On 3/3/10 3:39 PM, "Correia, James" <james.correia@pnl.gov> wrote:
>
>> Hi-
>> I am trying to draw wind barbs on a map.
>>
>> I am making a panel plot of station data, like so:
>> res@gsnDraw = False
>> res@gsnFrame = False
>> plot(0) = gsn_csm_contour_map(wks,var(:,0),res)
>> ...
>>
>> The calling the overlay and barb routine:
>> wmsetp("col",1)
>> wmsetp("wbs",.05)
>> res1@gsnDraw = False
>> res1@gsnFrame = False
>>
>> plt = gsn_csm_contour(wks,frq(0,:),res1)
>> wmbarbmap(wks,nlat,nlon,mu,mv)
>> overlay(plot(0),plt)
>> ...
>>
>> Then call gsn_panel.
>>
>> According to the examples on weather symbols this *should* work.
>> But, alas, no
>> wind barbs on my map, and no errors to report. I thought maybe I
>> had the order
>> of nlat and nlon incorrect but I tried it both ways and still
>> nothing.
>>
>> So do I need to somehow draw it first or should it be already
>> overlaid on plt?
>> Thanks for any insight...
>> jimmyc
>
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Received on Thu Mar 4 09:02:11 2010