How does a compass determine the directions?

The term "compass direction" means a direction shown by a magnetic compass, one whose needle will be drawn to a north-south alignment. When at a location and facing a certain direction, the "compass direction" is the one at the top (front) of the moving compass rose. If a location is in that direction, it is the indicated compass direction from the current point.

On a map, the direction from one point to another is indicated by the up-down and left-right line between the points, and the compass directions are indicated by a compass rose on the map.