compute spherical distance

This function provides a convienant wrapper to distHaversine

et_dist_haversine(latitude1, longitude1, latitude2, longitude2)

Arguments

latitude1	numeric vector of latitudes [degrees]
longitude1	numeric vector of longitudes [degrees] corresponding with latitude1
latitude2	numeric vector of latitudes [degrees]
longitude2	numeric vector of longitudes [degrees] corresponding with latitude2

Value

numeric, distance in nautical miles