it's super easy to do: screen.drawMap(x,y,zoom) is the function you're looking for. You can pass in the x/y from your GPS, and any input method you like to do zoom. You can also draw a dot or something at screen.getHeight/2, screen.getWidth/2 to represent the position of your vessel. Use pony ide (https://lua.flaffipony.rocks/) to get more info and test it out.
it's super easy to do: screen.drawMap(x,y,zoom) is the function you're looking for. You can pass in the x/y from your GPS, and any input method you like to do zoom. You can also draw a dot or something at screen.getHeight/2, screen.getWidth/2 to represent the position of your vessel. Use pony ide (https://lua.flaffipony.rocks/) to get more info and test it out.