Leaflet and Math - Rotation of point in a Map

Okay guys.
The problem has been solved !
Here is the solution: Calculate distance and bearing between two Latitude/Longitude points using haversine formula in JavaScript

Thank you all for the clues you gave… and I was able to put my program online !

I insert the link of my program written in XoJo: LINK
I don’t think I’m doing the wrong thing (I mean insert the link of my program to show you what I have / I’m combining with XoJo), but if so feel free to have the link deleted by an administrator, okay ?

XoJo allowed me to write this program despite my free time almost gone to zero! With Visual Studio who knows how long it would take ?

Now I keep updating it, improving it, speeding it up, adding new features, … :grinning:

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