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how much better is Sirf chipset?
edited November -1
What are the areas considered fringe such that the sirf chipset is better?
I need coverage in the metropolitan Los Angeles area.
Would I see a difference from the 12 or 14 channel receivers?
The more channels a GPS receiver has, the faster it can initially acquire a signal and the stronger the signal received will be in "fringe" areas. Fringe areas are areas where you have an obstructed view of the sky such as in a deep canyon, under dense foliage, or at the base of extremely tall buildings.
You would likely see a difference between a 12 and 20 channel receiver, however that is not so say you would necessarily have poor performance with a 12 channel receiver. I have a 12 channel receiver hard wired into my car and it has never lost its position in fringe areas.
I appreciate the advice on the number of channels given above.
One other requirement could be a deal breaker for me:
A screen larger than 3.5" which is - so I assume - the diagonal measurement. Or is 3.5" sufficiently clear for someone in his seventies?
I understand that the Tom Tom 910 has a 4" screen. Are there any others of that size?
If a model has Google Earth map-like features, how would that be indicated in the specs? 3-D? Or some other term?
A 3.5 inch screen is sufficient for most people. Yes, it is measured diagonally. The
Garmin Nuvi 660
also comes with a
I'm not sure what you mean by Google Earth map-like features. Can you be more specific? Google Earth has lots of features.
Sorry, Tim, it's also called "birdseye view" or "satellite images".
It seems that only a few select models have that feature.
There is only one GPS in existence right now that offers satellite images, and it isn't a GPS that offers auto/road routing.
Virtually every GPS designed for auto/road navigation offers a "3D view" or a "birds eye view" so I rarely mention that feature since virtually all of them sold now offer it.