[ncl-talk] vector polymarkers

[David Brown]

Hi Nisha,
Although I can't run your script since I don't have your data, I
suspect the problem is that you need to set
res at gsnFrame = False

before your call to gsn_csm_contour_map_polar.

Otherwise a frame call gets executed before you draw the vectors, and
the plot is blank by the time you draw the vectors with wmvectmap.
 -dave


On Thu, Jun 29, 2017 at 9:24 AM, Manisha Ganeshan
<manisha.ganeshan86 at gmail.com> wrote:
> Hi Dave,
>
> Thank you for your email. This is very useful!
> I'm unable to overlay the wind vectors on the map though. It seems like this
> function is independent from the map function, unlike gsn_add_polymarkers.
> I'm attaching my script. Wondering if there's an easy fix that I'm not
> seeing.
>
> Thanks,
> Nisha
>
> On Wed, Jun 28, 2017 at 7:37 PM, David Brown <dbrown at ucar.edu> wrote:
>>
>> You can use wmvectmap
>> (http://www.ncl.ucar.edu/Document/Functions/Built-in/wmvectmap.shtml).
>> There are aslo associated routines for setting parameters and drawing
>> wind barbs. You will need to look at the documentation -- the
>> interface for these routines are a bit different from the normal style
>> for NCL graphics.
>>  -dave
>>
>> On Wed, Jun 28, 2017 at 4:07 PM, Manisha Ganeshan
>> <manisha.ganeshan86 at gmail.com> wrote:
>> > Hello,
>> >
>> > Is there a way to plot wind vectors as polymarkers on a map? I have a
>> > one-dimensional array of u, v, lat, and lon (not gridded). I want to
>> > plot
>> > the wind speed and wind direction, ideally using arrow vector
>> > representation
>> > for each point. Any ideas how I could do this?
>> >
>> > Thanks,
>> > Nisha
>> >
>> > --
>> > Dr. Manisha Ganeshan
>> > Universities Space Research Association
>> > Maryland, U.S.A.
>> >
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>
>
>
>
> --
> Dr. Manisha Ganeshan
> Universities Space Research Association
> Maryland, U.S.A.