Calculates the shortest distance between two points on the Earth's surface using the Haversine formula, also known as the great-circle distance or "as the crow flies".

haversine(lat_from, lon_from, lat_to, lon_to, r = 6378137)

Arguments

lat_from

Latitude of the starting point.

lon_from

Longitude of the starting point.

lat_to

Latitude of the destination point.

lon_to

Longitude of the destination point.

r

Radius of the Earth in meters (default = 6378137).

Value

Vector of distances in the same unit as r (default in meters).

Details

The Haversine ('half-versed-sine') formula was published by R.W. Sinnott in 1984, although it has been known for much longer.

References

Sinnott, R.W, 1984. Virtues of the Haversine. Sky and Telescope 68(2): 159.

Author

Martin Haringa

Examples

haversine(53.24007, 6.520386, 53.24054, 6.520386)
#> [1] 52.32016