References
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A. C. Gardner and W. G. Creelman, Navigation. Pergamon Press,
1965.
- 
Paul S. Heckbert and Michael Garland, Survey of Polygonal Surface
Simplification Algorithms. Technical report (draft), School of
Computer Science, Carnegie Mellon University, 1997.
- 
Zhilin Li, An examination of algorithms for the detection of critical
points on digital cartographic lines. The Cartographic Journal, 32,
121-125, 1995.
- 
William Macfarlane, Home Trade Navigation Guide. Brown, Son and
Ferguson, 1963.
- 
D. A. Moore, Basic Principles of Navigation. Kandy Publications,
1964.
 GPSMan User Manual
  GPSMan User Manual
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