[do-me]

Very nice idea!

I think this could be really useful for visually impaired people. Just imagine, that instead of colors and letters you'd have unique shapes or to keep it simple something like a raster with holes. Every bus stop could have one of those raster plates while the people would have a sort of "key", designed to fit in "their bus".

I came up with a very similar approach to explain HyperLogLog a while ago and see some parallels.

Have a look at the (yet very ugly) illustrations I made a while ago: https://geo.rocks/post/hyperloglog-simply-explained/

I guess the key/lock principle is very similar to both, bloom filter and HyperLogLog and could yield other benefits as well, like counting distinct buses passing a stop and map them for city. In this way, one could easily create a heat map of the cities best- and worst-served areas.

[bitsinthesky]

That's a very cool idea. Thanks for the blog, it's well written. I love how you've applied the idea of a hashmap to a 2d foam board. I'm on the verge of having a breakthrough of improving my visualization but so far it hasn't arrived. If you think of anything feel free to let me know.