Talk:Haversine formula: Difference between revisions
which radius should be used
(→Different results: 6372.8 ≈ avg. Great-circle radius, while 6371.0 represents surface area radius) |
Walterpachl (talk | contribs) (which radius should be used) |
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:Right, “6371.0” is the authalic radius based on/extracted from surface area, while “6372.8” is an approximation of the radius of the average circumference (i.e., the average “great-elliptic” or “great-circle radius”), where the boundaries are the meridian (≈ 6367.45 km) and the equator (≈ 6378.14 km).
:See ''[http://math.wikia.com/wiki/Ellipsoidal_quadratic_mean_radius Ellipsoidal quadratic mean radius]''. [[User:Kaimbridge|<span style="border:1px solid green;color:#e55b3c; padding:2px;background:#fde0bc">~<font face="courier new bold" class="title" title="Kaimbridge M. GoldChild">Kaimbridge</font>~</span>]] 17:44, 19 August 2012 (UTC)
::Thank you for the excellent explanation. I'd still want that explanation in the task description
::and would advise programmers to use one specific value in order to get comparable results
::Maybe 2887.26 km as this is the majority. --[[User:Walterpachl|Walterpachl]] 18:11, 19 August 2012 (UTC)
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