In this tableau, four forest cards have been drawn, from left to right.
Card 1 fulfilled one of the three requirements of the map card.
Card 2 was no help because there is no east on the map.
Card 3 did not satisfy the map, but its wild icon made future draws more flexible (because the wild can fill either south or west).
Card 4 completes the tableau if you choose to assign the wild as a west map icon.