Key takeaways
- True north is the direction to the geographic North Pole — the Earth's axis of rotation.
- Maps are drawn to true north; a compass needle points to magnetic north (a different place).
- The angle between true and magnetic north is declination, which varies by location.
- To navigate accurately you must reconcile the two by accounting for declination.
What true north is
True north is the direction toward the geographic North Pole — the northern end of the axis the Earth rotates around. It’s a fixed, unchanging reference, and maps are oriented to it. When a map shows ‘north’, it means true north.
True north vs magnetic north
Your compass, however, doesn’t point to true north — it points to magnetic north, the location of the Earth’s magnetic pole, which is somewhere else entirely and drifts slowly over time. The angular difference between the two is declination, and it varies depending on where you stand.
A navigator plots a bearing on a map (true north) but must follow it on a compass (magnetic north). By setting their compass’s declination adjustment for the area, the two are reconciled — so the bearing they walk matches the line they drew.
Why it matters
Because map and compass use different norths, you must account for declination or your bearings will be off — and small errors grow over distance. Reconciling true and magnetic north (usually by setting declination on the compass) is fundamental to accurate navigation.
The bottom line
True north is the fixed direction to the geographic North Pole that maps are built around — not to be confused with magnetic north, where your compass needle points. The gap between them, declination, is what you must reconcile to navigate accurately. Get that right (usually by setting declination on your compass) and your map and compass finally speak the same language.
Frequently asked questions
What is true north?
True north is the direction toward the geographic North Pole — the northern end of the Earth's axis of rotation. It's a fixed reference, and maps are oriented to it. It's distinct from magnetic north, the direction a compass needle actually points.
What's the difference between true north and magnetic north?
True north points to the geographic North Pole (the Earth's rotational axis), while magnetic north points to the north magnetic pole, a separate location that slowly drifts over time. Because they're in different places, a compass (magnetic north) and a map (true north) disagree by an angle called declination, which varies depending on where you are.
Why does the difference between true and magnetic north matter?
Because maps use true north but compasses use magnetic north, you must account for the difference (declination) to navigate accurately — otherwise your bearings will be off, and the error compounds over distance. Adjusting your compass for declination, or correcting manually, keeps map and compass consistent.
Sources
- True vs magnetic north — NOAA
- Navigation — The Mountaineers