[Geowanking] liveblog: iphone location platform withgoogle/skyhook

[Kevin Mayall]

In line with your reply, what I'm getting at is, does anyone know the
approximate density of towers in central London/central Oxford?


-----Original Message-----
From: geowanking-bounces at lists.burri.to
[mailto:geowanking-bounces at lists.burri.to] On Behalf Of Andrew Larcombe
Sent: Thursday, January 17, 2008 5:05 AM
To: geowanking at lists.burri.to
Subject: Re: [Geowanking] liveblog: iphone location platform
withgoogle/skyhook


On 17 Jan 2008, at 01:28, Kevin Mayall wrote:

> Are there any metrics out there as to the relationship between density
> of towers and location accuracy?  How dense is "high density"?

Only anecdotally, but when I tried this in central London last  
September(?) on my n73 it was reporting ~500m accuracy. About 15  
miles outside of the centre in a reasonably built up suburban area I  
get ~1700m accuracy, whilst in central Oxford its about ~1000m. None  
of which are particularly useful for any real world applications as  
far as I can see.

Not had a problem with it locking up on an n73, either using cell- 
tower or bt gps for positioning. Wonder if the n95 issue is something  
to do with the built in a-gps?

Cheers,

A

-- 
Andrew Larcombe
Freelance Geospatial, Database & Web Programming

web: http://www.andrewlarcombe.co.uk
email: andrew at andrewlarcombe.co.uk
icq: 306690163




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