Map can be bought in Ori and The Will Of The Wisps if you can find Lupo. Check out this Ori And The Will Of The Wisps map location guide to find him in each area. This will make finding all the secrets and upgrades much easier.
Ori And The Will Of The Wisps Map Location Guide
You will need Double Jump and Stick to get to him. It doesn’t reveal the secrets of the area, but it does show you where you still can go. 50 orbs is also pretty cheap in the long run.
With the dash you need to jump off the vine near there and climb up the wall with stick.