alt Hacker NewsReprojection is accurate locally but inaccurate at scale.
Geodesics are the most accurate (Vincenty etc) but are computationally heavy.
Haversine is a nice middle ground.
Reprojection is accurate locally but inaccurate at scale.
Geodesics are the most accurate (Vincenty etc) but are computationally heavy.
Haversine is a nice middle ground.
But is it actually inaccurate at scale?
I get that drawing a projection is inaccurate at scale, but if I do all my calculation as meters north/south and east/west of 0,0 on the equator, won’t all my distance calculations be correct?
Like 5.000.000 east and 0 m north is 5.000km from the origin. I cannot see how that could ever become inaccurate as I move further away.
Where is the inaccuracy introduced? When I reproject back to coordinates on a globe?