1GIS::Distance::Polar(3pUms)er Contributed Perl DocumentatGiIoSn::Distance::Polar(3pm)
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NAME

6       GIS::Distance::Polar - Polar coordinate flat-earth distance
7       calculations.
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DESCRIPTION

10       Supposedly this is a formula to better calculate distances at the
11       poles.
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13       While implemented, this formula has not been tested much.  If you use
14       it PLEASE share your results with the author.  I've tested the results
15       of this formula versus GIS::Distance::Vincenty and it appears that this
16       formula is broken (or the implementation is) as you can see in
17       "t/polar.t".
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19       A faster (XS) version of this formula is available as
20       GIS::Distance::Fast::Polar.
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22       Normally this module is not used directly.  Instead GIS::Distance is
23       used which in turn interfaces with the various formula classes.
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FORMULA

26           a = pi/2 - lat1
27           b = pi/2 - lat2
28           c = sqrt( a^2 + b^2 - 2 * a * b * cos(lon2 - lon1) )
29           d = R * c
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SUPPORT

32       See "SUPPORT" in GIS::Distance.
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AUTHORS

35       See "AUTHORS" in GIS::Distance.
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38       See "COPYRIGHT AND LICENSE" in GIS::Distance.
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42perl v5.30.1                      2020-01-30         GIS::Distance::Polar(3pm)
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