R: Mid-point

midPoint {geosphere} | R Documentation

## Mid-point

### Description

Find the point half-way between two points along an ellipsoid

### Usage

    midPoint(p1, p2, a=6378137, f = 1/298.257223563)

### 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
`a` | major (equatorial) radius of the ellipsoid
`f` | ellipsoid flattening. The default value is for WGS84

### Value

matrix with coordinate pairs

### Author(s)

Elias Pipping and Robert Hijmans

### Examples

    midPoint(c(0,0),c(90,90))
    midPoint(c(0,0),c(90,90), f=0)

[Package geosphere version 1.5-5 Index]