Spherical curves are paths traced on the surface of a sphere. From navigation
loxodromes to geodesic great circles, these curves appear in geography,
astronomy, and crystallography.
Loxodrome (Rhumb Line)
Constant bearing navigation curve
x = R·cos(φ)·cos(λ)
y = R·cos(φ)·sin(λ)
z = R·sin(φ)
