R: Destination along a rhumb line

destPointRhumb {geosphere} | R Documentation

## Destination along a rhumb line

### Description

Calculate the destination point when travelling along a 'rhumb line' (loxodrome), given a start point, direction, and distance.

### Usage

    destPointRhumb(p, b, d, r = 6378137)

### Arguments

`p` | 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
`b` | bearing (direction) in degrees
`d` | distance; in the same unit as `r` (default is meters)
`r` | radius of the earth; default = 6378137 m

### Value

Coordinates (longitude/latitude) of a point

### Author(s)

Chris Veness; ported to R by Robert Hijmans

### References

http://williams.best.vwh.net/avform.htm#Rhumb

http://www.movable-type.co.uk/scripts/latlong.html

http://en.wikipedia.org/wiki/Rhumb_line

### See Also

`destPoint`

### Examples

    destPointRhumb(c(0,0), 30, 100000, r = 6378137)

[Package geosphere version 1.5-5 Index]