Compass Bearing Visualizer
See initial bearing and reverse bearing on the path between two places.
By Aryan Khan, Founder & Editor · Updated October 2026
For example, Heathrow to JFK starts at approx. 287.9° — visibly northwest on the compass rose — even though New York feels like it should be 'straight across' the Atlantic.
How to use Compass Bearing Visualizer
Bearings confuse people as numbers; as a picture they explain themselves. Two steps:
The Compass Bearing Visualizer draws the direction between two places so you can see it, not only read it: the initial great-circle bearing one way, the reverse bearing for the return, and the distance, all on the map and compass rose. It is the visual companion to a bearing calculation.
- 1Set start and end.
- 2Read bearings and distance.
What people use Compass Bearing Visualizer for
1. Teaching bearings without tears
Show a class the rose turning as the destination moves, and the difference between initial and reverse bearings stops being a formula and becomes something they can point at.
2. Checking a compass course
Before walking a bearing from the Bearing Calculator, sight the same line here: if the drawn direction disagrees with your expectation, one of the two points is wrong — find out indoors.
3. Antenna and dish alignment
A visual check that the short path to a distant station really does leave over the neighbour's roof in that direction saves a return trip up the ladder.
4. Route briefings
A drawn bearing communicates in a briefing what three spoken numbers cannot: where the journey starts out pointing, and why it is not the direction of the destination on a flat wall map.
Worked examples
JFK → Heathrow starts at approx. 51.4° (northeast); Heathrow → JFK starts at 287.9° (west-northwest). On the visualizer the two roses are plainly not opposites — the single clearest picture of great-circle geometry in this whole section.
Heathrow → Paris CDG starts at approx. 140.9° (southeast) and the return at 323.2° (northwest). Even at 347 km the asymmetry is visible, just smaller — the effect never fully switches off.
Compass points and their bearings
The 16-point compass rose this visualizer uses, with the bearing at the centre of each point — the reference for reading any result the tool draws.
| Point | Bearing | Point | Bearing |
|---|---|---|---|
| N | 0° | S | 180° |
| NNE | 22.5° | SSW | 202.5° |
| NE | 45° | SW | 225° |
| ENE | 67.5° | WSW | 247.5° |
| E | 90° | W | 270° |
| ESE | 112.5° | WNW | 292.5° |
| SE | 135° | NW | 315° |
| SSE | 157.5° | NNW | 337.5° |
A bearing like 51.4° sits between NE (45°) and ENE (67.5°) — reported as a number by the calculator, and as a direction you can see here.
How to interpret the result
The most common errors come from using a correct result to answer the wrong geographic question. Keep these points in mind for Compass Bearing Visualizer:
- Use the midpoint tool instead of averaging coordinates when splitting journeys: latitude/longitude averages distort over long legs and fail across the date line, while the spherical midpoint follows the actual path the distance was measured along.
- Always confirm which distance you need before quoting one: straight-line for physical questions, road distance for driving, and network time for schedules. The three can differ by half again in mountainous or island geography, and quoting the wrong one is the most common distance mistake in reports.
Limits & appropriate use
The honest limits here are about category, not quality: great-circle math is near-exact, but it answers 'how far over the surface', not 'how far as driven, flown or walked'. Airline distances follow airways and winds; odometers follow detours; hikers follow switchbacks. Quoting a straight-line number into a fuel budget is the classic misuse, which is why the tools keep the ladder visible — crow-flies, road, time — and label each rung. A second limit is definitional: 'city to city' means mapped centre to mapped centre, and a suburb-to-airport question is a different measurement wearing the same sentence.
Within those bounds the numbers are durable: reproducible from coordinates alone, stable across tools that use the same radius convention, and accurate to a fraction of a percent of geodetic truth. The escalation path is short and rarely needed — ellipsoidal libraries (Karney's algorithms) for survey-grade millimetres, the routing engine for network truth, and the airline's schedule for invoice truth. Knowing which authority owns which number is the entire craft of distance literacy.
- Survey-grade millimetres → ellipsoidal geodesic libraries, not sphere math.
- Fuel and schedule planning → road routing plus your congestion buffer.
- Airline invoicing → carrier distance tables (airways ≠ great circles).
Data & methodology
The shared bearing workspace computes initial and back bearings for two selected points, relative to true north, using spherical coordinates.
For source details, licences and model limitations, see Data Sources and Methodology.
Key terms worth knowing
- Initial bearing
- Compass angle from true north at departure along a great circle.
- Geodesic
- The ellipsoid-true shortest path; haversine approximates it within ~0.3%.
Editorial guidance: MapBench explains the method and limitations so the tool can be used as a transparent reference, not as a black-box answer. For legal boundaries, safety-critical routing, surveying, engineering, regulated decisions or official statistics, verify the result with the responsible authority or a qualified professional.
Category: Distance & Bearing. Results are intended for everyday analysis and planning unless a page explicitly states otherwise.
Method, assumptions & limits
- This tool’s method
- The shared bearing workspace computes initial and back bearings for two selected points, relative to true north, using spherical coordinates.
- Before relying on the answer
- Keep the endpoints and measurement mode fixed when comparing results. A surface separation, a compass bearing and a road distance are different outputs.
- What the result cannot establish
- A rounded coordinate or a city-centre search changes the endpoints. Do not interpret displayed decimal places as survey accuracy.
Coverage: Worldwide. Search, basemap and external data requests may use third-party services; browser-based does not mean every operation is offline. Read the source and licence notes, calculation methodology and privacy policy. If a result looks inconsistent, report a correction with the inputs and mode used.
Frequently asked questions
Clear answers about the calculation, accuracy and appropriate use.
Magnetic needle?
Results are true bearing — apply declination for magnetic compasses.
How accurate is this distance?
The geometric calculation is suitable for planning and comparison, but the answer is only as accurate as the coordinates you provide. Road, terrain and legal distances can differ.
Can I use coordinates instead of place names?
Yes. Where the tool accepts locations, you can paste latitude and longitude directly for a more explicit input.
Why can this differ from Google Maps or a road route?
Straight-line and geodesic tools measure geometry on Earth, while road-routing tools follow an actual transport network. They answer different questions.
Is this the same as the Bearing Calculator?
It computes the same spherical bearings; the difference is presentation. The calculator leads with numbers, this tool leads with the drawn line and compass rose. Many people check a number here before trusting it.
Does the rose show magnetic north?
No — bearings are true (from geographic north). A handheld compass reads magnetic north; apply your local declination before using a drawn bearing outdoors.
Why is the line between the points curved?
Because the shortest surface path is a great circle, which a flat map projection bends. The bearing shown is the direction at the start of that curved path.
Can I read the bearing at the destination instead?
The reverse bearing is exactly that perspective: the direction you would set off on from the destination to come back. Both are drawn so you can compare them.
What bearing is due west on the rose?
270°. Points run clockwise from north: 0° N, 90° E, 180° S, 270° W, with the sixteen named points spaced 22.5° apart.
Does it work for two points in the same town?
Yes. At short range the curve flattens and the bearing behaves like the flat-map direction — the visual check is still the fastest way to catch a swapped point.
Can I use coordinates instead of searching?
Yes — set either point by coordinates or by clicking the map when a named search is ambiguous.
Related tools and resources
For the numbers-first version, use the Bearing Calculator; for the dedicated starting-azimuth tool, the Initial Great Circle Bearing Calculator; and to fly a heading between airports, the Flight Bearing Calculator.
More free tools
Sources, methodology & editorial trust
- ✓ Browser-first processing where supported
- ✓ External sources are documented
- ✓ No account required for public tools
- ✓ Review data sources
Calculations are documented with their assumptions, limitations and source context rather than presented as unexplained answers.
Reviewed and maintained by Aryan Khan, Founder & Editor of MapBench.
Part of our bearing & midpoint hub
Compass Bearing Visualizer sits in the bearing & midpoint cluster, alongside 17 other tools that answer neighbouring questions with different methods or datasets.
You may also need
When this answer is only part of the job, these clusters cover the next step.
Read the guide behind this tool
How to Choose a Fair Meeting Point Between Two or More Places — A practical guide to geographic midpoints, travel-time fairness and choosing a meeting location that works in the real world rather than only on a straight-line map.