Geodesic.cpp File Reference

Implementation for GeographicLib::Geodesic class. More...

#include "GeographicLib/Geodesic.hpp"
#include "GeographicLib/Constants.hpp"
#include <algorithm>
#include <limits>

Go to the source code of this file.

Namespaces
namespace	GeographicLib

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Detailed Description

Implementation for GeographicLib::Geodesic class.

Copyright (c) Charles Karney (2008) <charles@karney.com> and licensed under the LGPL.

This is a reformulation of the geodesic problem. The notation is as follows:

• at a general point (no suffix or 1 or 2 as suffix)
  • phi = latitude
  • beta = latitude on auxilliary sphere
  • lambda = longitude on auxilliary sphere
  • chi = longitude
  • alpha = azimuth of great circle
  • sigma = arc length along greate circle
  • s = distance
  • tau = scaled distance (= sigma at multiples of pi/2)
• at previous northwards equator crossing
  • beta = phi = 0
  • lambda = chi = 0
  • alpha = alpha0
  • sigma = s = 0
• a 12 suffix means a difference, e.g., s12 = s2 - s1.
• s and c prefixes mean sin and cos

Definition in file Geodesic.cpp.