AlongGreat {RFOC}

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 <[e-mail]>

Examples

london = c(51.53333, -0.08333333)

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