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[strategies][distance][spherical][cross_track] remove duplicate word in comments section

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Menelaos Karavelas
2014-11-14 01:11:27 +02:00
parent fd956ff683
commit cf2bb9d9c7
1 changed files with 2 additions and 2 deletions
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4
include/boost/geometry/strategies/spherical/distance_cross_track.hpp
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@@ -55,8 +55,8 @@ namespace comparable
The distance d1 need when the projection of the point is is within the
segment must be the true distance. However, comparable::haversine<>
returns a comparable distance instead of the one needed.
To remedy this, we compute implicitly compute what is
needed. More precisely, we need to compute sin(true_d1):
To remedy this, we implicitly compute what is needed.
More precisely, we need to compute sin(true_d1):
sin(true_d1) = sin(2 * asin(sqrt(d1)))
= 2 * sin(asin(sqrt(d1)) * cos(asin(sqrt(d1)))