Re: [udig-users] Combining Wind Direction and Wind Speed Data into Wind

["Paul Ramsey" <pramsey@xxxxxxxxxxxxxxxxx>]

Why not? Do I misunderstand? Mapserver can do it.. it just takes a lot
of rules, and the ability to do rotated symbols.  So you feed
windspeed into a set of 5-6 rules that choose a symbols with the right
number of barbs, then rotate that symbol based on the wind direction,
voila.

What's uDig / SLD missing? The rotation-based-on-attribute part?

P.

On Tue, Aug 12, 2008 at 4:27 PM, Jody Garnett <jgarnett@xxxxxxxxxxxxxxx> wrote:
> Thanks for the excellent summary of options; while the "style layer
> descriptor" specification we use for rendering vector data is very complete
> - wind barbs are a very hard problem :-) As are cold fronts and a host of
> other interesting weather related symbology.
>
> Since you asked on the user list I will have to say no - uDig cannot render
> wind barbs. We would love to see the functionality developed - and would be
> pleased to start you out in a good direction.
>
> Jody
>
> Jesse Eichar wrote:
>>
>> Hi,
>>
>> There are two ways to do this.  Implementing a MapGraphic is probably the
>> easiest.  Create a MapGraphic extension that draws the wind speed/barb.
>>
>> The other way is complicated but I'll quickly throw it out just to be
>> complete.  You make a IService for the wind data/ wind direction (maybe one
>> for each).  Then implement a Renderer for drawing them.  Sounds simple but
>> really it will be around 10 classes.
>>
>> Jesse
>>
>> On 11-Aug-08, at 10:46 PM, John Schattel wrote:
>>
>>> I am retrieving wind data from a Web Feature Service.  I'd like to
>>> combine the wind speed data and wind direction data into a wind barb as
>>> shown below:
>>>
>>> http://ww2010.atmos.uiuc.edu/(Gh)/guides/maps/sfcobs/wnd.rxml
>>>
>>> Can I do this with Udig?  If so, how would I go about merging the two
>>> data sets into the one graphic.
>>>
>>> In advance, thanks for any help you can provide.
>>>
>>> John
>>>
>>> --
>>> John.Schattel@xxxxxxxx
>>> (301) 713-0056 x111
>>>
>>> The contents of this message are mine personally and do not necessarily
>>> reflect any position of NOAA.
>>>
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