There are some posts about maps here:
- Memorizing Maps
- How to memorize location-based information (like maps)?
- French tutorial on memorising maps
- Remember routes
and more:
If you post specific examples, people here could probably offer additional tips.
Whether it’s possible depends on various things. If you need to do it and there isn’t a way to extend the deadline, it’s probably best to just dive in, study as hard as possible, and get as far as you can.