Great-Circle Distance (Haversine)
Shortest-path distance and initial bearing between two lat/lon positions on the spherical earth.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Latitudes | ° | |
| Longitudes | ° | |
| Earth mean radius (nm) | nm | |
| Distance | nm |
Source: Bowditch - American Practical Navigator Ch.4; Admiralty Manual of Navigation (BR45)
In short
Shortest-path distance and initial bearing between two lat/lon positions on the spherical earth.