[gmoore]

maybe the 'three words' model? Seems like it would be specific enough to locate a bench

[Liquid_Fire]

That's essentially equivalent to coordinates since you still need to translate it to some human-understandable form, so it doesn't solve the problem.

[cjs_ac]

WhatThreeWords is a proprietary algorithm and has problems with homophones.

[voidUpdate]

I thought W3W was specifically designed to mitigate homophone problems, it seems pointless otherwise...

[1970-01-01]

Yeah, that would absolutely work, but it's not free and donations may or may not cover their costs: https://accounts.what3words.com/select-plan