R: Great circle

greatCircle {geosphere} | R Documentation

## Great circle

### Description

Get points on a great circle as defined by the shortest distance between two specified points

### Usage

    greatCircle(p1, p2, n=360, sp=FALSE)

### 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
`n` | The requested number of points on the Great Circle
`sp` | Logical. Return a SpatialLines object?

### Value

A matrix of points, or a list of such matrices (e.g., if multiple bearings are supplied)

### Author(s)

Robert Hijmans, based on a formula provided by Ed Williams

### References

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

### Examples

    greatCircle(c(5,52), c(-120,37), n=36)

[Package geosphere version 1.5-5 Index]