Wind barb flags and pennants for south hemisphere should face the opposite side

[saberraz]

What is the bug or the crash?

With the recent addition of wind barb as a styling option for mesh vectors, the barbs face the wrong direction for the south Hampshire:

See: https://en.wikipedia.org/wiki/Station_model#Plotted_winds

Note the ones exactly on the equator should follow the north hemisphere direction.

Steps to reproduce the issue

• Open QGIS
• Download this data set
• Unzip and load the data as mesh in QGIS
• Style the wind data using windbarb styling
• Zoom around the equator and you will see the barbs are all facing the same direction both in the north and south

Versions

3.37

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[saberraz]

See discussion also here: spatialsparks/Leaflet.windbarb#3