This function uses the haversine formula to calculate the great circle distance between two locations, identified by their latitudes and longitudes. It is borrowed from rnoaa (https://github.com/ropenscilabs/rnoaa/blob/master/R/meteo_distance.R) and included here as rnoaa is a large package that is rather unrelated to maxcovr. I have renamed it from meteo_spherical_distance to spherical_distance

spherical_distance(lat1, long1, lat2, long2)

## Arguments

lat1 Latitude of the first location. Longitude of the first location. Latitude of the second location. Longitude of the second location.

## Value

A numeric value giving the distance in meters between the pair of locations.

## Note

This function assumes an earth radius of 6,371 km.

## Examples


spherical_distance(lat1 = -27.4667,
long1 = 153.0217,
lat2 = -27.4710,
long2 = 153.0234)#> [1] 506.7013