s2 Geometry is a library for geometry on the sphere, useful for geohashing purposes. Some documentation can be found in the presentation below.
- License: Apache 2.0 (see LICENSE)
- Presentation: https://docs.google.com/presentation/d/1Hl4KapfAENAOf4gv-pSngKwvS_jwNVHRPZTTDzXXn6Q/view?pli=1