GPS always available?


tiguk

macrumors 6502
Jun 12, 2008
310
4
UK
Yes, same as the iPhone can. The only difference is that it won't be 'assisted' so might take longer to lock into a location.
 

Julien

macrumors G4
Jun 30, 2007
11,140
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Atlanta
Yes, same as the iPhone can. The only difference is that it won't be 'assisted' so might take longer to lock into a location.
....unless you restart GPS from the same relative position you stopped the service.;)
 

Dorv

macrumors regular
Feb 11, 2008
243
37
The Skyhook WiFi system is not GPS, assisted or otherwise.
 

Sdevante

macrumors 6502
Dec 12, 2008
373
1
But do you have to pay anything for the GPS service? Like could I buy a 3G iPad but not activate the 3G service with AT&T and still have GPS?
 

Julien

macrumors G4
Jun 30, 2007
11,140
3,828
Atlanta
But do you have to pay anything for the GPS service? Like could I buy a 3G iPad but not activate the 3G service with AT&T and still have GPS?
No you don't have to have 3G service for GPS. You just need 3G if you want Assisted GPS.
 

nStyle

macrumors 65816
Original poster
Dec 6, 2009
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Assisted GPS = Step by step directions? So are you saying that without the 3G service, it will simply tell me where I am at, along with maybe a map of the area and points of interest, or will I have to have service to view the POI?

I was indeed inquiring about the to-be-released model... I don't understand why people think they can get GPS on a Wifi
 

CJS7070

macrumors 6502a
Dec 10, 2008
755
0
Chicago, IL
Assisted GPS = Step by step directions? So are you saying that without the 3G service, it will simply tell me where I am at, along with maybe a map of the area and points of interest, or will I have to have service to view the POI?

I was indeed inquiring about the to-be-released model... I don't understand why people think they can get GPS on a Wifi
Because the wifi model has a method of determining your location without using gps. Its not gps, but it does the same thing more or less.
 

Julien

macrumors G4
Jun 30, 2007
11,140
3,828
Atlanta
Assisted GPS = Step by step directions? So are you saying that without the 3G service, it will simply tell me where I am at, along with maybe a map of the area and points of interest, or will I have to have service to view the POI?...
Read here
 

nStyle

macrumors 65816
Original poster
Dec 6, 2009
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Because the wifi model has a method of determining your location without using gps. Its not gps, but it does the same thing more or less.
Sure, if you are connected to a Wifi network. Pretty useless.
 

ARH1956

macrumors 6502
Sep 12, 2007
383
37
NE Alabama
Because the wifi model has a method of determining your location without using gps. Its not gps, but it does the same thing more or less.
Less for certain. Without a GPS chipset the Wi-Fi iPad will be utterly lost outside of a major metropolitan area where it can't get any Wi-Fi assistance.
 

Sdevante

macrumors 6502
Dec 12, 2008
373
1
So are you saying that without the 3G service, it will simply tell me where I am at, along with maybe a map of the area and points of interest, or will I have to have service to view the POI?
I am also wondering this. If it still gives you directions for only ~$100 more than wi-fi version, well worth it. But if it only tells you where you are without directions; not so useful.
 

CJS7070

macrumors 6502a
Dec 10, 2008
755
0
Chicago, IL
I didn't mean that literally as more or less, I meant that, in simple terms and for all intents and purposes, it can find your location without a gps chip.
 

JonboyDC

macrumors regular
Jul 19, 2004
201
0
The wi-fi model does not have GPS, but uses Skyhook, which estimates your location based on nearby wi-fi signals that have a known location. In a city, it can be pretty accurate. In the country, it's useles.

The 3G model will have a GPS receiver in it. It will always be able to determine your location using the GPS satellite system, even if you do not have 3G service. But if you don't have 3G service and aren't in range of an open wi-fi connection, your iPad won't be able to download the maps from Google for the built-in Maps app. (If you are using a GPS app from someone else, the maps may be stored locally on your iPad, so the lack of an internet connection won't matter).

Finally, Assisted GPS is a system that uses triangulation on cell phone towers to enable the regular GPS chip to more quickly determine your location.
 

bjobes

macrumors regular
Jul 21, 2008
168
0
What about the compass. I only have the iPhone 3g (non compass) is this too playing a major role in the 3G model
 

jtara

macrumors 68000
Mar 23, 2009
1,826
432
The wifi model doesn't have the GPS functionality. Period. The GPS functionality is built-in to the 3G chip.

The 3G model does not need a 3G subscription or 3G services to function. If you do have 3G services, then start-up time for determining your location will be faster, because the base station will assist with obtaining the initial location. If you do not have a subscription, then you don't get the "assist" but you still get "real" GPS, just really, really slow initial fixes.
 

avaloncourt

macrumors 65816
Oct 18, 2007
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I am also wondering this. If it still gives you directions for only ~$100 more than wi-fi version, well worth it. But if it only tells you where you are without directions; not so useful.
Applications such as Navigon and TomTom have the map set built into the software. For the 3G model the maps are always there regardless whether you have a 3G signal or not. If the application supports turn by turn directions you will get turn by turn directions. Obviously you won't have traffic service or the Navigon Google POI lookup without a way to get that data. Something like the Google Maps application will not give you turn by turn because if you have no wi-fi or 3G connection there isn't any way to download the map segments or instructions.
 

hazmatzak

macrumors regular
Apr 29, 2008
135
0
Sure, if you are connected to a Wifi network. Pretty useless.
More and more websites have location-based info. Given that (on a WiFi iPad) you can't access (live) websites at all without a connection, there is value to WiFi Location Services; it is useful. It is useless for locating yourself "in the middle of nowhere". So it depends on what people are expecting to do with "GPS".
 

nStyle

macrumors 65816
Original poster
Dec 6, 2009
1,094
199
More and more websites have location-based info. Given that (on a WiFi iPad) you can't access (live) websites at all without a connection, there is value to WiFi Location Services; it is useful. It is useless for locating yourself "in the middle of nowhere". So it depends on what people are expecting to do with "GPS".
True, but a Wifi connection is unlikely "in the middle of no where". If you're in a city (where Wifi lives), you're likely to realize your location. I could see it useful for finding restaurants in unknown cities and things like that.
 

Dorv

macrumors regular
Feb 11, 2008
243
37
Assisted GPS = Step by step directions? So are you saying that without the 3G service, it will simply tell me where I am at, along with maybe a map of the area and points of interest, or will I have to have service to view the POI?

I was indeed inquiring about the to-be-released model... I don't understand why people think they can get GPS on a Wifi
My apologies, I misunderstood.

Assisted GPS just utilizes local phone towers to help the GPS system locate you more quickly. I'm not sure if it will work without 3G enabled or not.

AGPS will not do turn by turn. As mentioned in the thread, you can always purchases a GPS app that holds the maps in memory instead of relying on Google Maps to download the, but YMMV on their price/usability.
 

jaw04005

macrumors 601
Aug 19, 2003
4,369
15
AR
Finally, Assisted GPS is a system that uses triangulation on cell phone towers to enable the regular GPS chip to more quickly determine your location.
Assisted GPS just utilizes local phone towers to help the GPS system locate you more quickly. I'm not sure if it will work without 3G enabled or not.
That’s the big question at the moment. I have a feeling it will. Surely, the iPad Wi-fi + 3G model will let you know if you have AT&T 3G service before allowing you to purchase a pre-paid data plan.