R: Distance Along Great Circle Arc

GreatDist {RSEIS} | R Documentation

## Distance Along Great Circle Arc

### Description

Distance Along Great Circle Arc in degrees, kilometers

### Usage

    GreatDist(LON1, LAT1, LON2, LAT2, EARTHRAD= 6371)

### Arguments

`LON1` | Longitude, point1
`LAT1` | Latitude, point1
`LON2` | Longitude, point2
`LAT2` | Latitude, point2
`EARTHRAD` | optional earth radius, default = 6371

### Value

LIST:

`drad` | distance in radians
`ddeg` | distance in degrees
`dkm` | distance in kilometers

### Author(s)

Jonathan M. Lees <jonathan.lees@unc.edu>

### Examples

    ###  get distance between London, England and Santiago, Chile
    london  <-  c(51.53333, -0.08333333)
    santiago  <-  c(-33.46667, -70.75)

    GreatDist(london[2], london[1], santiago[2], santiago[1])

[Package RSEIS version 3.7-4 Index]