Dear,
First of all, thanks for the great product and support.
We purchased the highcharts base license and are currently investigating if we would like to get the highmaps extension aswell.
Context
I found out the following "flight routes" chart:
Which is very close to one of our use case for a custom map.
I would like a slight modification however, and did not find much documentation on the "chart.path" property.
More broadly, I do not find much documentation on how to draw your custom svg elements on these maps.
Example I used
https://www.highcharts.com/demo/maps/flight-routes
My example
https://codepen.io/lsokal/pen/VwmzLVB
Request Modifications
I would like to add ARROWHEADS to these lines to show the direction of the fluxes.
Also, the curvature on the lines is probably not needed for our use case but I did not really research how to modify your the custom functrion from the flight-routes example.