Hello
i want to know if wi-fi effects GPS accuracy if i used Gps using CLLocation manger in my application
+1
A:
No, WiFi and GPS use a different frequency (2.4-2.5 and 1.2-1.5 Ghz).
Sjoerd
2010-06-25 08:17:08
GPS L1 1575.42 MHz, L2 1227.60 MHz
dbasnett
2010-06-25 11:55:38
A:
WiFi (and/or cell tower triangulation) assists the GPS to give you a location faster, but it doesn't make the location more accurate.
EDIT - Apple recommends turning ON Wi-Fi and cellular network connections to assist in locating GPS satellites faster in article HT1975 which says:
"Verify that you have a cellular or Wi-Fi network connection. This allows the Assisted GPS (A-GPS) on the device to locate visible GPS satellites faster, in addition to providing initial location information using the Wi-Fi or cellular networks. "
progrmr
2010-06-25 08:17:31
but i read that make sure wi-fi is off and GPS filter on medium for improving Gps accuracy
a111
2010-06-25 08:20:20
Yes, it is explained [here](http://support.apple.com/kb/HT1975) under Improving GPS Accuracy: "Verify that you have a cellular or Wi-Fi network connection. This allows the Assisted GPS (A-GPS) on the device to locate visible GPS satellites faster, ..."
progrmr
2010-06-25 16:33:27
@a111 - do you have a source for that statement? And was it specific to the iPhone?
GalacticCowboy
2010-06-25 19:13:13