GoogleMaps Framework Reference
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GMSGeometryHeading
extern CLLocationDirection GMSGeometryHeading(CLLocationCoordinate2D from,
CLLocationCoordinate2D to)
Returns the initial heading (degrees clockwise of North) at from of the shortest path to to.
The returned value is in the range [0, 360).
Returns 0 if the two coordinates are the same.
Both coordinates must be valid.
To get the final heading at to one may use (GMSGeometryHeading(to, from) + 180) modulo 360.
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Last updated 2025-08-27 UTC.
[null,null,["Last updated 2025-08-27 UTC."],[],["`GMSGeometryHeading` calculates the initial heading in degrees clockwise from North, representing the shortest path from one coordinate (`from`) to another (`to`). The output is within the range of 0 to 360, with 0 returned if coordinates are identical. Both input coordinates must be valid. The final heading at the destination coordinate (`to`) can be derived by adding 180 to `GMSGeometryHeading(to, from)` and taking the modulo 360.\n"],null,[]]
