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Using a Starting LAT-LON, return points along an azimuth
AlongGreat(LON1, LAT1, km1, ang, EARTHRAD= 6371)
LIST:
Latitude, destination point
Longitude, destination point
distance in degrees
distance in km
Longitude, point
Latitude, point
Kilometers in direction ang
Direction from North
optional earth radius, default = 6371
Jonathan M. Lees <jonathan.lees@unc.edu>
Returns LAT-LON points along a great circle, so many kilometers away in a specified direction
london = c(51.53333, -0.08333333) AlongGreat(london[2], london[1], 450, 56)
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