Re: iPhone Maps location feature

On 22/01/2008, Wes Groleau wrote in message <eTalj.5364$Yl.2507@trnddc01>:

Tom Harrington wrote:
Wes Groleau <groleau+news@xxxxxxxxxxxxx> wrote:
But was the correct location within the edge of the large circle?

No, not by several miles.

Ah, then they most certainly have an incorrect algorithm.

Or incorrect data.

The algorithm is very complicated. The strength of a base station signal
is affected by the geological and architectural features between in the
area surrounding the base station and handset. You can't just find the
signal strengths of the closest base stations and apply the inverse square
rule. This is the first widescale application of such an algorithm. I
won't be at all surprised if Google has to keep tuning its software for a
few years before it starts to be dependable.

Simon.
--
http://www.hearsay.demon.co.uk
.

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