Wifi positioning backends

[Stephen Wing]

Andrew Turner wrote:
> Regarding some distance estimate, I would think 100m be the top-most
> error, b/c most AP's don't typically have a range much beyond that.

But does itprecisely locate their APs in the first place - if the
location of the AP is only accurate to 500m in the first place, then
this may be a bigger limiter than the range of the AP itself.

Steve