Radius used to convert S2's angular measures into meters.
S2 is defined on a unit sphere, so lengths and areas only become metric once
a radius is chosen. This is the authalic mean radius the S2 reference
implementation uses, which keeps areas comparable with other S2 tooling.
Radius used to convert S2's angular measures into meters.
S2 is defined on a unit sphere, so lengths and areas only become metric once a radius is chosen. This is the authalic mean radius the S2 reference implementation uses, which keeps areas comparable with other S2 tooling.