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---> Re: Comparisons Anthony R. Gold03-02-2010
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Posted by Rod Speed on March 3, 2010, 11:56 am


Thibaud Taudin Chabot wrote
> Peter H. Coffin wrote
>> Ret. wrote

>>> Very often, of course, the same unit will calculate a different route when
returning from a location, than the route
>>> it took getting you *to* the location!

>> Sometimes that can be explained by turn weighting. An on-side turn getting a
different preference than off-side
>> turns... Or it thinking that going three-quarters of the way around a big
roundabout is enough distance difference to
>> need a different route.

> 1. a calculated time of 30 seconds more makes that route not the fastest....
2. traffic lights are not an item in the
> calculation

They are in the latest TomTom engine, users can allow the
TT to upload actual times taken over a particular route.

Its less clear how many allow their TTs to upload
that data and how much data they do get that way.



Posted by Sunshine on March 3, 2010, 12:38 pm


On Thu, 4 Mar 2010 03:56:10 +1100, "Rod Speed"

>They are in the latest TomTom engine, users can allow the
>TT to upload actual times taken over a particular route.
>Its less clear how many allow their TTs to upload
>that data and how much data they do get that way.

How does that 'upload' function work? Do you periodically connect the
GPS to a computer to download the data from the GPS?


Posted by Rod Speed on March 3, 2010, 2:02 pm


Sunshine wrote

>> They are in the latest TomTom engine, users can allow the
>> TT to upload actual times taken over a particular route.

>> Its less clear how many allow their TTs to upload
>> that data and how much data they do get that way.

> How does that 'upload' function work? Do you periodically connect
> the GPS to a computer to download the data from the GPS?

Yes. Its optional tho, you dont have to allow it to do that.



Posted by Sunshine on March 3, 2010, 4:55 pm


On Thu, 4 Mar 2010 06:02:19 +1100, "Rod Speed"

>Sunshine wrote
>> How does that 'upload' function work? Do you periodically connect
>> the GPS to a computer to download the data from the GPS?
>Yes. Its optional tho, you dont have to allow it to do that.

Thanks.


Posted by Anthony R. Gold on March 2, 2010, 6:17 pm



> I have a Garmin Nuvi 200W as my first satnav. I have been very pleased with
> it.
> Last week I acquired a TomTom One and decided to give it a try for the sake
> of making a comparison. I was surprised that the TomTom wanted me to stay on
> the defined route - even when I arrived at my destination after straying -
> it was telling me to turn around. Is this normal with TomTom - or is it just
> a feature of that model.

TomTom does recalculate routes, but when it's preference setting - fastest
journey time or shortest distance - requires a U-turn then that's what it
will demand.

AFAIK all models use the same navigation engine although later versions of
the software may not always be released to update all the older models.

Tony

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