destPointRhumb: Destination along a rhumb line

In geosphere: Spherical Trigonometry

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://www.edwilliams.org/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)

Example output

Loading required package: sp
       lon       lat
 0.4491714 0.7779639

geosphere documentation built on May 2, 2019, 5:16 p.m.