how to reveal the map (without cheats)?

[Kebabiman the Kebab-Giver]

do i have to explore every single ti province?
or there is an idea/mission for it?

[linutika]

Just wait. Discovery spread usually reveals it fully by late 1700s

[Laladen]

You can ask other countries to share maps. You have to have positive relations on the higher side and I think it costs 10 Prestige. You can see how many provinces will be revealed before you accept.

This may possibly be a DLC feature, I can't remember.

[Kebabiman the Kebab-Giver]

Originally posted by James de la Katona (poel):

Just wait. Discovery spread usually reveals it fully by late 1700s

its late 19th century though

[Kebabiman the Kebab-Giver]

Originally posted by Fedaykin:

You can ask other countries to share maps. You have to have positive relations on the higher side and I think it costs 10 Prestige. You can see how many provinces will be revealed before you accept.

This may possibly be a DLC feature, I can't remember.

thats a dlc feature

[Arsonium]

It seems to be bugged for american nations (at least for Incas), I've completed a full game and haven't got a single discovery. Only provinces I see in 1821 in Europe, Asia and Africa are coastal (that I have explored myself) and capitals. I also see a couple provinces in the eastern Siberia, but that is probably due to me having colonies there.
I am having discoveries as usual while playing Old World nations.

[northernwater]

You can also steal maps by building spy networks. This is a stepwise approach, and you need a unit, land or naval, adjacent to the region.

[Kebabiman the Kebab-Giver]

playing as the ottomans

dlcs i have: art of war, common sense and right of man

year is 1874 and i only have the extended timeline mod

[Yxklyx]

You don't get that much auto-discovery in some cases. In my Aztecs game I only got coastal areas. The interior was all fog even past 1800.