Best way to make a World-Map?

Hey guys!

Till yet i never figured out what the best way is to make a worldmap?
Do i need to render a 2D-Image of the Map itself and then translate coordinates to mark where i am actually? Or is there another way?

The main functionality should be the ability to place markers on this map and see my own position aswell the ones from the teammates.

theres a thing on the marketplace that does all that, its called “quest map and navigation system”. maybe itll give you some inspiration.