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What is accuracy of GPS location?

Ans : 

CLLocationAccuracy class provides accuracy constant.

kCLLocationAccuracyKilometer:
Accurate to the nearest kilometer.


kCLLocationAccuracyBestForNavigation:
The highest possible accuracy that uses additional sensor data to facilitate navigation apps. 
kCLLocationAccuracyBest:
The best level of accuracy available.
kCLLocationAccuracyNearestTenMeters:
Accurate to within ten meters of the desired target. 
kCLLocationAccuracyHundredMeters:
Accurate to within one hundred meters.
kCLLocationAccuracyThreeKilometers:
Accurate to the nearest three kilometres.



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