(Great news. I've just found I have a GPS in my iPad) -WRONG!

ammcfc

macrumors member
Original poster
Aug 23, 2008
36
0
Great news. I've just found I have a GPS in my iPad.
I 'm always wondering how iPad find my location on Maps Apps.
So... I installed iGo My Way..and guess what...I have a gps chip!!!!
My model is 16GB - 499$

It's all about Skyhook technology... I've never supposed that Skyhook is so accurate in urban area. Better than GPS at some locations.
The case is closed ;)
Cheers for my stupidity

 

nStyle

macrumors 65816
Dec 6, 2009
1,094
199
Yeah but there has to be Wifi outside of your home.

Pretty sure stridemat's signature covers it.
 

ammcfc

macrumors member
Original poster
Aug 23, 2008
36
0
Do you see wi-fi icon at the screenshot? Look at the gps signal on the right....
I guess Apple doesn't have enough mainboards for the launch day and start assembling iPads with gps chip.
 

aduteau

macrumors 6502a
Oct 14, 2007
552
46
oh my god ... from what I was reading all over the forums .. was that the Wi-fi version of the iPad needed a Wi-fi connection to get the assisted GPS on ...

Are you saying that you are not Wi-fi connected when using GPS ?
If so does that mean that the Wi-Fi version of the iPad has a GPS chip.???

Oh boy ... I was waiting for the 3G version just to get a GPS chip in my iPad ... did I go wrong ??
 

JonboyDC

macrumors regular
Jul 19, 2004
201
0
No GPS. It's just using the Skyhook system to approximate your location based on the strength of the wi-fi signals from known hot spots. It's the same tech that allows the original iPhone and the iPod Touch to determine your general location (along with triangulation from cell phone towers, for the iPhone). Because there's not cell chip and no GPS chip in your iPad, the location services will only work if it can locate some known hot spots.

oh my god ... from what I was reading all over the forums .. was that the Wi-fi version of the iPad needed a Wi-fi connection to get the assisted GPS on ...
Also, for the record, this is not assisted GPS. Assisted GPS uses triangulation from cell-phone towers to supplement an actual GPS chip. Things like Skyhook and cell tower triangulation are work-around replacements for GPS, but they're not GPS (assisted or otherwise).
 

Julien

macrumors G4
Jun 30, 2007
11,140
3,829
Atlanta
There are no 3G's out yet so you don't have it. You just have standard WiFi triangulation.
 

ammcfc

macrumors member
Original poster
Aug 23, 2008
36
0
Igo My Way works only with valid GPS signal. Tomorrow I will make a movie showing navigation in action ;)
 

4DThinker

macrumors 68020
Mar 15, 2008
2,033
1
Hey OP. Turn off your Wifi and try again. Don't let the app turn it on again if it asks to. Also please take a screen shot of your setting menu showing the GPS toggle.
 

jtara

macrumors 68000
Mar 23, 2009
1,826
433
You are misunderstanding the "GPS signal strength" indicator in the app. If the app claims to have such, it is misrepresenting what it means.

There is NO WAY to determine GPS signal strength on an iPhone or iPad. An app can only determine the estimated accuracy of the location system. The location system determines your location based on GPS, WiFi signals registered with Skyhook, tower triangulation (if you have a cell radio, so no go for iPad WiFi or iPod Touch), or IP address.

Unfortunately, the location system doesn't tell the app what method it is using. The app can guess based on the hardware model and reported accuracy, but it is just a guess.

I've written GPS software for the iPhone, and I have to admit I have a "signal strength indicator" kinda thingy (that changes color from black to red to yellow to green) but don't represent it specifically as such. So, I'm pretty familiar with how the location API works.
 

jtara

macrumors 68000
Mar 23, 2009
1,826
433
Do you see wi-fi icon at the screenshot? Look at the gps signal on the right....
It's using the last known location, from the last time it was connected to the Internet. This would be based either on WiFi or IP address.

Yes, you will be able to drive around and your reported location will change. You don't have to actually be connected to a WiFi router for it to use it for location. Any WiFi signals that it sees (and you are going to see plenty driving around in a dense city) it will look-up in the Skyhook database.

This might actually be useful for navigation in a big city. Take it out to an unpopulated rural area. Fail.
 

avaloncourt

macrumors 65816
Oct 18, 2007
1,315
0
I want to see the actual map not a screen shot of a turn instruction.

Looking forward to your video of it in operation because you're the only person on the planet with a Wi-Fi model that contains GPS.
 

skubish

macrumors 68030
Feb 2, 2005
2,669
0
Ann Arbor, Michigan
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_3 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7E18 Safari/528.16)

Sorry Charlie. Thanks for playing. You are just using skyhook. Most gps apps will work with the wifi triangulation. Ifixit has already taken apart the ipad and confirmed no gps chip.
 

ammcfc

macrumors member
Original poster
Aug 23, 2008
36
0
A friend of mine will make a movie soon. Be patient. I hope after a hour I will prove my statement ;)
 

Bodhi395

macrumors 6502a
Jul 23, 2008
817
0
No way there is GPS, there has been tear downs of the ipad already and none have revealed any secret GPS chip.

They wouldn't just stick some in WIFI only units, even if they had extras. They would just save them for use in 3G units.
 

ammcfc

macrumors member
Original poster
Aug 23, 2008
36
0
GO My way 2009 depends on the built-in Location Services of the iPhone operating system. You can navigate with iGO My way 2009 as soon as the iPhone receives the GPS signals, calculates the position and makes it available for the applications.

Please note however, that there are applications that do not require accurate, GPS-based location information. These applications may operate with the far less accurate GSM network-based location information. Unfortunately this location method is not accurate enough for turn-by-turn navigation.

Furthermore, even the GPS-based location may be (or may become) inaccurate under some conditions. iGO My way 2009 requires a relatively high level of accuracy in order to be able to provide accurate guidance. Other applications may set a lower threshold.

When your iPhone loses the GPS signals, or when the location becomes inaccurate (due to whatever reason), iGO My way 2009 doesn't immediately announce that the position is lost. Instead, it applies sophisticated algorithms (considering e.g. road geometry*) in trying to predict the most likely position and to continue guidance. However, as the level of uncertainty gets beyond a threshold, it would be too risky to pretend to know the location. Setting this threshold was the result of carefully balancing perceived service quality versus the risk of wrong guidance.

Tip: Watch for the little brown dot around the vehimarker - that represents the last location data as received from the iPhone OS, and iGO My way 2009 displays that without any delay or filtering. Sometimes that dot lags significantly behind the vehimarker.

* Tunnels are special cases: in tunnels, iGO My way can safely assume that you are moving along the road and can continue location display and guidance based on the speed at which you entered the tunnel.
 

Aduntu

macrumors 6502a
Mar 29, 2010
598
1
Guys...Guys....

I have some scars on my palm... I didn't believe it at first, but I think I'm Jesus.
 

jtara

macrumors 68000
Mar 23, 2009
1,826
433
A friend of mine will make a movie soon. Be patient. I hope after a hour I will prove my statement ;)
LOL, like I said take it to an unpopulated area. Dunno where you live, I can get to the dessert in an hour. That's the only way to prove it.