Get the initial bearing (direction to travel in) to go from point1 to point2 following the shortest path (a great circle). Note that bearings change continuously while traveling along a great circle. A route with constant bearing is a rhumb line (see bearingRhumb).
Usage
bearing(p1, p2)
Arguments
p1
longitude/latitude of point(s), in degrees; can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a spatialPoints* object
p2
as above. Should have same length as p1, or a single point (or vice versa when p1 is a single point