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geosphere (version 1.5-20)

midPoint: Mid-point

Description

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

Usage

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

Value

matrix with coordinate pairs

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

Author

Elias Pipping and Robert Hijmans

Examples

Run this code
midPoint(c(0,0),c(90,90))  
midPoint(c(0,0),c(90,90), f=0)  

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