Paint your nails with white nail polish, and cut the map into pieces that fit your nails. Then, paint the map pieces with rubbing alcohol and press them on your nails with a Q-tip. Leave it on for a minute or so, then gently peel them off. Paint with a clear top coat to protect the design, but make sure to use quick strokes so the map prints won't smear.
Here's another method for you to try: soak your nails in rubbing alcohol, then place the map pieces on your nails and remove them after a few seconds.
Source: Instagram User annienellerr