Adrian Cochrane is a user on floss.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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Hey, have anyone here heard about Discrete Global Grids?
They're a really cool alternative to coordinate systems that better models geographic information whilst making computations much cheaper (true distance computation, union, intersection, simplification, etc)!
They work by splitting the earth into hexagons (or other polygons), splitting those up into further hexagons, and giving them all a consistent numbering scheme.
P.S. My father does GIS standards.
So to represent an area with this, you simply build an array of digit strings. With however many digits of accuracy you have, because a point in geo information is never actually a point. There's only ever really areas.