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GPS not accurate?

M

maiden16tiger

macrumors member
Original poster
Jul 2, 2008
79
0
i have to walk more than 80 yards in order for my iphone to locate my location.
like, if i was just standing somewhere, it wouldnt detect me.... anyone has this problem?
 
if you're inside a house that might be the problem

ive noticed on the first floor of my house it always reads like across the street. when i go upstairs its accurate.when i step outside its accurate too
 
I was at Angel Stadium last night and used the GPS as I walked around the stadium for a while. Seemed to locate me fine around the stadium. No troubles with my GPS so far.
 
My speciality is training students to use integrated GPS units
worth $80-$100,000.
I am blown away by the accuracy of the cheap little GPS chip in the iPhone.
(and other phones as well).
Love the map integration too!
 
The gPS itself is very accuarte (as accurate as TOM TOM, or any other GPS chip).

The issue is with Google Maps. You think it has to locate your position, retrieve a map for that position, then move and do it again as fast as you are travelling-that aint going to happen with any real degree of reliable accuarcy at speed over an average 3G connection.

GPS with the iphone is severely hampered with Google maps, It need its own built in map database to be of any use really.
 
needthephone said:
The gPS itself is very accuarte (as accurate as TOM TOM, or any other GPS chip).

The issue is with Google Maps. You think it has to locate your position, retrieve a map for that position, then move and do it again as fast as you are travelling-that aint going to happen with any real degree of reliable accuarcy at speed over an average 3G connection.

GPS with the iphone is severely hampered with Google maps, It need its own built in map database to be of any use really.
Click to expand...
works fine for me driving at 70mph, always accurate, and maps download very fast, even over gprs
 
Check with a genius. Mine worked fine since I bought it. Then recently it started misbehaving. It would lose me all the time and in google maps the blue halo around the tracking ball would fluctuate in size. With my replacement iphone it now finds me in about 5 seconds and halo disappears almost instantly.
 
Don't forget that GPS needs line of sight to the satellites in order to function correctly. If you are indoors expect errors in where the GPS says you are located.
 
GPS is always really spotty for me. Sometimes it follows me closely, other times, it's got a gray circle around it and it sucks. It's different depending on the clouds and environment you're in.
 
branjosef said:
I like it when I am not moving and the blue dot moves. Thats the best, but hey, its better than nothing.
Click to expand...

Even my Garmin handhelp mapping GPS unit will float when I am standing still. I think that's the nature of GPS, it is constantly receiving information and calculating and plotting position, so it floats a little.

That one has an option to lock on roads to keep it tracking directly on the road, if you turn that off it won't always track exactly on the road, it will drift from side to side.
 
StingerT125 said:
Even my Garmin handhelp mapping GPS unit will float when I am standing still. I think that's the nature of GPS, it is constantly receiving information and calculating and plotting position, so it floats a little.

That one has an option to lock on roads to keep it tracking directly on the road, if you turn that off it won't always track exactly on the road, it will drift from side to side.
Click to expand...

Thanks for the info... I didn't know that. :)
 
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