Tracer

You touch a creature or an object and mark it for the duration of the spell. While it is marked, you know roughly the direction and the distance that separates the target from you. The target is unaware it is being traced. 

When you cast this spell using a spell slot of 2nd Level, the duration of the spell becomes 8 hours and for the duration, you know the exact direction and distance that separates the target from you. When you cast this spell using a spell slot of 3rd level, for half the duration, you know the exact location of the target, this can be used in the first or second half of the spell's duration.