@Fenr1r
I understood, it was indirect answer .
@ze-stuart
https://forum.suunto.com/post/187990
Then you can search in the Web, all vectorized map are having only graphical data, precomputed before map generation by the map builders, based on any external data they want / can access (for free or not).
For elevation usable data, you may also read for example how some people are trying to create them in a reedable format and as much precise as they can.
https://sonny.4lima.de/
It is also a huge work to create them, and then, look at the amount of GB for the whole world.
For my country, I use them with android app, and it is taking 6GB.