Why would there even be a map to locate Luke if he’s gone into hiding>? Plus don’t Force sensitive folk ‘sense’ each other and talk to each other remotely as seen in the OT.
Depends Obi-Wan, Luke, Leia and Vader all get Force hunches but the entire Jedi council don’t see Palpatine coming and Palpatine doesn’t quite read the situation between Luke and Vader fully. I guess the map is just a prediction based on known sightings and the final bit of the jigsaw leads to his final destination. I doubt if it was drawn up by Luke like a business card.