Returns the distance (measured along the surface of the sphere) to the
given LonLat, implemented using the Haversine formula. This is
equivalent to
S1Angle(ToPoint(), o.ToPoint())
except that this function is slightly faster, and is also somewhat less
accurate for distances approaching 180 degrees (see s1angle.h for
details). Both LngLats must be normalized.
Returns the distance (measured along the surface of the sphere) to the given LonLat, implemented using the Haversine formula. This is equivalent to
S1Angle(ToPoint(), o.ToPoint())
except that this function is slightly faster, and is also somewhat less accurate for distances approaching 180 degrees (see s1angle.h for details). Both LngLats must be normalized.