RFOC (version 1.0-4)

AlongGreat: 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

Value

• LIST:
• lat
  Latitude, destination point
• lon
  Longitude, destination point
• distdeg
  distance in degrees
• distkm
  distance in km

Details

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

Examples

london = c(51.53333, -0.08333333)

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