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Agree with your main issue. https://en.wikipedia.org/wiki/Open_Location_Code https://en.wikipedia.org/wiki/Open_Location_Code solves this quite nicely, and also
by foxylad 8y ago
Agree with your main issue. https://en.wikipedia.org/wiki/Open_Location_Code https://en.wikipedia.org/wiki/Open_Location_Code solves this quite nicely, and also the OP's issue of W3W being non-free.