Snyder equal-area projection

Snyder equal-area projection is used in the ISEA (Icosahedral Snyder Equal Area) discrete global grids. The first projection studies was conducted by John P. Snyder in the 1990s.

It is a modified Lambert azimuthal equal-area projection, most adequate to the polyhedral globe (truncated icosahedron with 20 hexagons and 12 pentagons).

For non-exact approximations (to equal-area) it can be replaced by Gnomonic projection, as in H3 Uber[1][2].

References

• https://proj.org/operations/projections/isea.html
• https://www.researchgate.net/publication/246557072_ISEA_discrete_global_grids
• Snyder, J. P. (1992), “An Equal-Area Map Projection for Polyhedral Globes”, Cartographica, 29(1), 10-21. urn:doi:10.3138/27H7-8K88-4882-1752.