The Rules state that you get notified by veins within 1 tile visibility, which implies veins on the whole map aren't revealed to all players, we need to keep track ourselves where they are.
However, if you post publicly all actions of all players, then it becomes obvious from "Harvest XY" actions that tile XY contains a vein, which somewhat defeats the purpose of the secret info system in the rules.
So I think it would be enough to post current locations of players, but not their actions.