R: Get Points Along Great Circle

AlongGreat {RFOC} | R Documentation

## Get Points Along Great Circle

### Description

Using a Starting LAT-LON, return points along an azimuth

### Usage

    AlongGreat(LON1, LAT1, km1, ang,  EARTHRAD= 6371)

### Arguments

`LON1` | Longitude, point
`LAT1` | Latitude, point
`km1` | Kilometers in direction ang
`ang` | Direction from North
`EARTHRAD` | optional earth radius, default = 6371

### Details

Returns LAT-LON points along a great circle, so many kilometers away in a specified direction

### Value

LIST:

`lat` | Latitude, destination point
`lon` | Longitude, destination point
`distdeg` | distance in degrees
`distkm` | distance in km

### Author(s)

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

### Examples

    london = c(51.53333, -0.08333333)

    AlongGreat(london[2], london[1], 450, 56)

[Package RFOC version 3.4-3 Index]