What is northern most point that will be reached when following a great circle? Computed with Clairaut's formula. The southern most point is the
antipode of the northern-most point. This does not seem to be very precise; and you could use optimization instead to find this point (see examples)
longitude/latitude of point(s). Can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialPoints* object
A matrix with coordinates (longitude/latitude)
Ed Williams, Chris Veness, Robert Hijmans
1 2 3 4 5
lon lat [1,] -49.82544 65.76869 $maximum  -49.82544 $objective  65.76869
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