The land card you return from your graveyard, if any, isn’t a target of the ability. You choose that card as the ability is resolving, after you surveil 1. It can be a land card you just put into your graveyard or one that was already there.
Whenever this creature deals combat damage to a player or battle, surveil 1, then you may return a land card from your graveyard to the battlefield tapped. (To surveil 1, look at the top card of your library. You may put that card into your graveyard.)
