I suspect this is the problem;

https://github.com/geotools/geotools/blob/872b44c28bb55f1e301bb607d53d431826ab7e78/modules/library/render/src/main/java/org/geotools/renderer/style/windbarbs/WindBarb.java#L229
 
<https://github.com/geotools/geotools/blob/872b44c28bb55f1e301bb607d53d431826ab7e78/modules/library/render/src/main/java/org/geotools/renderer/style/windbarbs/WindBarb.java#L229>

If that was 47 I think you will get a filled pennant

That is assuming this diagram is officially correct;
https://tephi.readthedocs.io/en/latest/barbs.html

Russ

> On 11 Mar 2021, at 09:04, Daniele Romagnoli 
> <daniele.romagn...@geo-solutions.it> wrote:
> 
> Right,
> and the piece of code doing the build of the pennant is right there:
> https://github.com/geotools/geotools/blob/main/modules/library/render/src/main/java/org/geotools/renderer/style/windbarbs/WindBarb.java#L358
>  
> <https://github.com/geotools/geotools/blob/main/modules/library/render/src/main/java/org/geotools/renderer/style/windbarbs/WindBarb.java#L358>
> 
> Regards,
> Daniele
> 
> 
> On Thu, Mar 11, 2021 at 2:37 AM <br...@frogmouth.net 
> <mailto:br...@frogmouth.net>> wrote:
> The windbarb rendering code is in geotools.
> 
> https://github.com/geotools/geotools/tree/main/modules/library/render/src/main/java/org/geotools/renderer/style/windbarbs
>  
> <https://github.com/geotools/geotools/tree/main/modules/library/render/src/main/java/org/geotools/renderer/style/windbarbs>
> 
> You may be able to add a custom symbol using normal GeoServer styling, but 
> the code approach is likely easier and better.
> 
> Brad.
> 
> On 11 Mar 2021 4:20 am, Niklas Elelid <geoserverl...@neware.se 
> <mailto:geoserverl...@neware.se>> wrote:
> Following the instructions in the GeoServer docs I have added the style 
> windbarbs to my layer.
> 
> 
> 
> https://geoserver.geo-solutions.it/educational/en/multidim/accessing_multidim/rtx/wind_barbs.html
>  
> <https://geoserver.geo-solutions.it/educational/en/multidim/accessing_multidim/rtx/wind_barbs.html>
> 
> The flag in a windbarb symbolizing 50kts wind should be filled. I have been 
> trying to find how the well known windbarb is built (and possibly can be 
> changed) in GeoServer but have had no luck. Anyone has any good suggestions?
> 
> 
> 
> Thanks!
> 
> 
> 
> Niklas
> 
> 
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