Anyone ever heard of anything like this?

[asdfasdflkjty911]

This would be sick for the official map, and maybe instead of a second map you could
Go to one edge, like if the map is 5000x5000 then on the east edge at 5000 it could continue on I'm that direction for say 3000-5000 more blocks and it could be just for ships, a giant ocean right there and future nations can set up small ports and pirate ports can be created. That way you can still mine on the mainland
And when your ready with a crew you can venture off and there can e islands with treasures and dungeons at sea, ext.