[Loadstone] Built-in GPS

Cearbhall O Meadhra cearbhall.omeadhra at idd.ie
Mon Jun 25 16:54:44 BST 2007


Thanks, Monty,

At least I now know how to reply to those who ask me about it! 

All the best,
 
 
Cearbhall 
 
"Good design enables - Bad design disables"
 
Tel: 01-2864623 Mob: 087 9922227 Em: cearbhall.omeadhra at projectidd.ie
 
-----Original Message-----
From: loadstone-bounces at loadstone-gps.com
[mailto:loadstone-bounces at loadstone-gps.com] On Behalf Of
monty at loadstone-gps.com
Sent: 25 June 2007 16:43
To: loadstone at loadstone-gps.com
Subject: Re: [Loadstone] Built-in GPS

Hello Cearbhall,

I can't personally comment on the quality of the GPS receivers built in to
some of Nokia's handsets (such as the N95) as I haven't had the pleasure of
getting my hands on one but I have read that the GPS receiver on-board the
N95 is not using the SIRF Star III chipset.  In fact, I have heard rumour
that it uses SIRF Star II.

At the moment Loadstone does not support these on-board GPS receivers though
we hope to include support in the near future.

Best regards,
   Monty


On Mon, 25 Jun 2007, Cearbhall O Meadhra wrote:

> Dear all,
>
> I have been asked about the GPS receivers in the latest Nokia phones.
> Sighted users say that they are good and work well. Has anyone any 
> experience of these phones with Talks and loadstone or any other 
> guidance application?
>
>
> All the best,
>
>
> Cearbhall
>
> "Good design enables - Bad design disables"
>
> Tel: 01-2864623 Mob: 087 9922227 Em: cearbhall.omeadhra at projectidd.ie
>
>
>
>
>  _____
>
> From: loadstone-bounces at loadstone-gps.com
> [mailto:loadstone-bounces at loadstone-gps.com] On Behalf Of Rob Melchers
> Sent: 24 June 2007 18:55
> To: loadstone at loadstone-gps.com
> Subject: Re: [Loadstone] MTK chipset, was Re: royaltek rbt 2110
>
>
> Hallo Jurg,
>
> When using programs like Wayfinder or Trekker this software wants to 
> put you in a street, not on top of a building. If you're put in the 
> wrong street, the faulty reading is as faulty as the distance between 
> the street you are in and the street the software thinks you are in. 
> So, if these streets are seperated by 40 meters, you're off by 40 
> meters, even though your receiver may not be more off than 15 meters. 
> When using Loadstone I do not experience faults bigger than 20 meters 
> in urban canyons and I'm afraid that's what we have to live with using 
> GPS as an orientational tool. In the area I live in (a mix of low and 
> high buildings seperated by open areas) accuracy usually is between 10 
> and 15 meters. In good conditions this can improve to between
> 5 and 10 meters, but that's about it. Again I would like to warn for 
> receivers that use averaging models and 'improvements after 
> reception'. So far these improvements have had no influence on the 
> kind of accuracy we are looking for.
>
> Rob
>
> At 6/24/2007, you wrote:
>
>
> Content-class: urn:content-classes:message
> Content-Type: multipart/alternative;
>        boundary="----_=_NextPart_001_01C7B633.7E17195D"
>
> hi Rob,
> ; In theory, MPR is responsible for a plus minus 3 meters degradation 
> of accuracy is this what you see in practice as well?
> I'd would say accuracy is degradated up to 40 meters in practice.
> I made some testing with another software which announces me in 
> realtime on which street i am.
> Sometimes, on the same street, it gives me a parallel street in about 
> 40 meters, but as this happens not all the time, it cannot be a problem of
map.
> Hence, i'd say it's a problem of reflexions.
> Jürg
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>




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