CoreLocation + A-GPS
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When setting kCLLocationAccuracy (locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation), which method uses A-GPS to obtain the coordinates and which methods solely relies on GPS?
Is there a way to programmatically tell when the phone is/is not using A-GPS?
What output difference can one expect in the latitude and longitude when the locationManager is not making use of A-GPS?
swift core-location
edited Nov 19 at 17:07
Damon
480317
asked Nov 19 at 13:35
shawn.t
255
add a comment |
up vote
0
down vote
favorite
When setting kCLLocationAccuracy (locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation), which method uses A-GPS to obtain the coordinates and which methods solely relies on GPS?
Is there a way to programmatically tell when the phone is/is not using A-GPS?
What output difference can one expect in the latitude and longitude when the locationManager is not making use of A-GPS?
swift core-location
edited Nov 19 at 17:07
Damon
480317
asked Nov 19 at 13:35
shawn.t
255
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
When setting kCLLocationAccuracy (locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation), which method uses A-GPS to obtain the coordinates and which methods solely relies on GPS?
Is there a way to programmatically tell when the phone is/is not using A-GPS?
What output difference can one expect in the latitude and longitude when the locationManager is not making use of A-GPS?
swift core-location
edited Nov 19 at 17:07
Damon
480317
asked Nov 19 at 13:35
shawn.t
255
When setting kCLLocationAccuracy (locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation), which method uses A-GPS to obtain the coordinates and which methods solely relies on GPS?
Is there a way to programmatically tell when the phone is/is not using A-GPS?
What output difference can one expect in the latitude and longitude when the locationManager is not making use of A-GPS?
swift core-location
swift core-location
edited Nov 19 at 17:07
Damon
480317
asked Nov 19 at 13:35
shawn.t
255
edited Nov 19 at 17:07
Damon
480317
asked Nov 19 at 13:35
shawn.t
255
edited Nov 19 at 17:07
Damon
480317
edited Nov 19 at 17:07
Damon
480317
edited Nov 19 at 17:07
Damon
480317
480317
asked Nov 19 at 13:35
shawn.t
255
asked Nov 19 at 13:35
shawn.t
255
asked Nov 19 at 13:35
shawn.t
255
255
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
The underlying technology used to get location fixes is hidden from you when you use CoreLocation. The docs I've read from Apple imply that it is always using a combination of GPS, cell tower triangulation, and WiFi location, so I suspect the answer is "always, if cell towers and or/geo-positioned WiFi stations are detected."
You can experiment with this by writing an app that logs the lat/long and "horizontal accuracy" readings, and the running the app as you turn WiFi and then cell service off.
answered Nov 19 at 13:51
Duncan C
91.4k13114194
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
The location manager returns CLLocation objects. Take a look at theCLLocationclass references in Xcode or online. It includes the horizontal accuracy field I was talking about.
– Duncan C
Nov 20 at 14:37
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
The underlying technology used to get location fixes is hidden from you when you use CoreLocation. The docs I've read from Apple imply that it is always using a combination of GPS, cell tower triangulation, and WiFi location, so I suspect the answer is "always, if cell towers and or/geo-positioned WiFi stations are detected."
You can experiment with this by writing an app that logs the lat/long and "horizontal accuracy" readings, and the running the app as you turn WiFi and then cell service off.
answered Nov 19 at 13:51
Duncan C
91.4k13114194
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
The location manager returns CLLocation objects. Take a look at theCLLocationclass references in Xcode or online. It includes the horizontal accuracy field I was talking about.
– Duncan C
Nov 20 at 14:37
add a comment |
up vote
1
down vote
accepted
The underlying technology used to get location fixes is hidden from you when you use CoreLocation. The docs I've read from Apple imply that it is always using a combination of GPS, cell tower triangulation, and WiFi location, so I suspect the answer is "always, if cell towers and or/geo-positioned WiFi stations are detected."
You can experiment with this by writing an app that logs the lat/long and "horizontal accuracy" readings, and the running the app as you turn WiFi and then cell service off.
answered Nov 19 at 13:51
Duncan C
91.4k13114194
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
The location manager returns CLLocation objects. Take a look at theCLLocationclass references in Xcode or online. It includes the horizontal accuracy field I was talking about.
– Duncan C
Nov 20 at 14:37
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
The underlying technology used to get location fixes is hidden from you when you use CoreLocation. The docs I've read from Apple imply that it is always using a combination of GPS, cell tower triangulation, and WiFi location, so I suspect the answer is "always, if cell towers and or/geo-positioned WiFi stations are detected."
You can experiment with this by writing an app that logs the lat/long and "horizontal accuracy" readings, and the running the app as you turn WiFi and then cell service off.
answered Nov 19 at 13:51
Duncan C
91.4k13114194
The underlying technology used to get location fixes is hidden from you when you use CoreLocation. The docs I've read from Apple imply that it is always using a combination of GPS, cell tower triangulation, and WiFi location, so I suspect the answer is "always, if cell towers and or/geo-positioned WiFi stations are detected."
You can experiment with this by writing an app that logs the lat/long and "horizontal accuracy" readings, and the running the app as you turn WiFi and then cell service off.
answered Nov 19 at 13:51
Duncan C
91.4k13114194
answered Nov 19 at 13:51
Duncan C
91.4k13114194
answered Nov 19 at 13:51
Duncan C
91.4k13114194
answered Nov 19 at 13:51
Duncan C
91.4k13114194
91.4k13114194
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
The location manager returns CLLocation objects. Take a look at theCLLocationclass references in Xcode or online. It includes the horizontal accuracy field I was talking about.
– Duncan C
Nov 20 at 14:37
add a comment |
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
The location manager returns CLLocation objects. Take a look at theCLLocationclass references in Xcode or online. It includes the horizontal accuracy field I was talking about.
– Duncan C
Nov 20 at 14:37
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
What is meant by "horizontal accuracy"? Any reading I can do on that topic?
– shawn.t
Nov 20 at 9:34
The location manager returns CLLocation objects. Take a look at the
CLLocation class references in Xcode or online. It includes the horizontal accuracy field I was talking about.– Duncan C
Nov 20 at 14:37
The location manager returns CLLocation objects. Take a look at the
CLLocation class references in Xcode or online. It includes the horizontal accuracy field I was talking about.– Duncan C
Nov 20 at 14:37
add a comment |
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