Yes this is a VERY precise map within 4km of my home location, come on over, I'll put coffee on.
This type of map is of importance to the Communications Center of the tribe or the MAG. From my location if I were to try to contact someone in TJs location I would point a directional antenna 210° South South West. If I had a Dipole antenna which is bi-directional I would set it up that it would "run" along a line towards 300° nnw or 120° sse. And my Radio signal will radiate 210° and 030°
Depending on who you may want to contact it helps to know in what direction you should send your signals.