hello /math/, i built a wifi+gps device i carry aound town in

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hello /math/,

i built a wifi+gps device i carry aound town in a backpack to map wifi hotspots.

every five seconds, my software gives me current lat,long and a list of found hotspots, with their "power" rating (1 - 100, where a higher number means you're closer to the ap).

when i pass by and around a particular ap, i will have a set of (location, power) tuples which should let me calculate its "actua"l position (with some obvious error).

i expect the algorithm for this already exists, but i don't know the name of it.