bearingRhumb {geosphere} | R Documentation |
Rhumbline direction
Description
Bearing (direction of travel; true course) along a rhumb line (loxodrome) between two points.
Usage
bearingRhumb(p1, p2)
Arguments
p1 |
longitude/latitude of point(s). 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 |
Value
A direction (bearing) in degrees
Note
Unlike most great circles, a rhumb line is a line of constant bearing (direction), i.e. tracks of constant true course. The meridians and the equator are both rhumb lines and great circles. Rhumb lines approaching a pole become a tightly wound spiral.
Author(s)
Chris Veness and Robert Hijmans, based on formulae by Ed Williams
References
https://www.edwilliams.org/avform147.htm#Rhumb
https://en.wikipedia.org/wiki/Rhumb_line
See Also
Examples
bearingRhumb(c(10,10),c(20,20))
[Package geosphere version 1.5-18 Index]