Manual Reference Pages - GIS::DISTANCE::FORMULA::GREATCIRCLE (3)
GIS::Distance::Formula::GreatCircle - Great circle distance calculations. (BROKEN)
A true Great Circle Distance calculation. This was created
because the GIS::Distance::MathTrig calculation uses
Math::Trigs great_circle_distance() which doesnt actually
appear to use the actual Great Circle Distance formula.
Normally this module is not used directly. Instead GIS::Distance
is used which in turn interfaces with the various formula classes.
As documented in more detail at the BUGS section of GIS::Distance,
the distances returned by this module seem to be invalid. Dont use
this module unless you want to help fix it.
c = 2 * asin( sqrt(
( sin(( lat1 - lat2 )/2) )**2 +
cos( lat1 ) * cos( lat2 ) *
( sin(( lon1 - lon2 )/2) )**2
This method is called by GIS::Distances distance() method.
Aran Clary Deltac <firstname.lastname@example.org>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
|perl v5.20.3 ||GIS::DISTANCE::FORMULA::GREATCIRCLE (3) ||2015-06-11 |
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