[gradsusr] Wind Arrow

[Olivier TRECA]

Thank you for your answer but it’s not really what I want to do.

The arrow I want to make are like in the picture attached.

Do you have a method to do that ?


> Le 19 oct. 2014 à 20:25, Jeff Duda <jeffduda319 at gmail.com> a écrit :
> 
> Olivier,
> You'll probably want to use a combination of maskout() and set strmden <http://www.iges.org/grads/gadoc/gradcomdsetstrmden.html> to control the appearance of the arrowheads on a streamline plot.  The maskout() function will plot a set of streamlines in an area corresponding to whatever speed, direction, or other threshold you want (sounds like you want to use speed as a threshold), and all of the streamlines plotted will correspond to the current 'set strmden' settings.  Between each display command you will want to re-enter the 'set strmden' command with different settings and use different thresholds in the maskout() function.
> 
> Jeff Duda
> 
> On Sun, Oct 19, 2014 at 5:11 AM, Olivier TRECA <otreca at me.com <mailto:otreca at me.com>> wrote:
> Hello,
> 
> My name is Olivier and I’m from France. I use GrADS to make the maps which describe the weather and the migration of the birds.
> 
> Could see my map on this site : 
> 
> http://www.chasseurdemigrateurs.com/meteo/view/2014/10/19 <http://www.chasseurdemigrateurs.com/meteo/view/2014/10/19>
> 
> The wind is important but I don’t have found how to make cute arrows and so I use the streamlines. But I’m not happy.
> 
> What I want to make is small arrows when the wind is light and big one filled for example in red when the wind is stronger. 
> 
> I think it could be possible drawing a rectangle and a triangle at the right place and with the right size… but I’m not aware with this type of manipulation.
> 
> If somebody could help me !
> 
> Many thanks
> 
> Olivier TRECA
> otreca at me.com <mailto:otreca at me.com>
> 
> 
> <PastedGraphic-2.tiff>
> 
> 
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
> http://gradsusr.org/mailman/listinfo/gradsusr <http://gradsusr.org/mailman/listinfo/gradsusr>
> 
> 
> 
> 
> -- 
> Jeff Duda
> Graduate research assistant
> University of Oklahoma School of Meteorology
> Center for Analysis and Prediction of Storms
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20141020/fe3ff873/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Capture d?e?cran 2014-10-20 a? 06.18.13.png
Type: image/png
Size: 1119528 bytes
Desc: not available
Url : http://gradsusr.org/pipermail/gradsusr/attachments/20141020/fe3ff873/attachment-0001.png