[ILUG] SatNav advice

[Gerry Boland]

I read an interesting article on the technology of GPS:
http://arstechnica.com/articles/paedia/assisted-gps.ars

It seems to imply that the more advanced GPS units have smarter algorithms
for determining its position as fast as possible, i.e. on turning on the
unit, when the satellite positional data has not yet been received, it
extrapolates where it expects the satellite to be from previous data and
uses that approximation to calculate immediate coordinates.

That article points me to believe that there are greater differences between
the cheap and expensive GPS units than simply screen size, storage &
bluetooth.
-G

2009/1/21 Rory Browne <rbmlist at gmail.com>

> 2009/1/21 Timothy Murphy <gayleard at eircom.net>
>
> > Anyone got a recommendation for a SatNav,
> > for use mainly in Europe, in particular Italy?
> >
> > I'm looking at Elara's offers (www.elara.ie).
> > They have a special offer of Garmin Nuva 756T for 284 euro,
> > which seems quite expensive.
> > They also give 5 stars to the Garmin Nuva 255, for 125 euro.
> > It's not really clear to me what you get for the extra money.
> > (They also have much cheaper Garmin's.)
> >
> > Would you recommend Garmin, as a make?
> > I've got a Lidl SatNav, but I wouldn't give it top marks.
> >
> I've got two Garmin Nuvis, the 200 and the 250, and if your needs are
> basic,
> then I'd hapilly recommend either.
>
> I'd suggest going through the Garmin site to see if you can compare the
> various versions - the biggest difference I've seen is the size of the
> screen, and on-board storage - more storage sometimes means bigger ( as in
> Europe instead of Ireland/UK ) or possibly more detailed maps.
>
> Alternatively, you could check if openstreetmaps has the area you're going
> to well covered, and then get the cheapest Garmin Nuvi and put the OSM maps
> on it. If it doesn't you could get a the next model up and map it yourself.
> --
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