Quote:
Originally Posted by Bill14564
Do you have a source for the claim of the lack of accuracy of the phone's GPS at lower speeds? I would like to see the math behind that.
I have a Garmin GPS on one of my carts and another brand (don't recall which) of GPS spedometer on the other. I have compared them to each other and to the Waze app on my phone. Either all three are accurate or all three are inaccurate in exactly the same amount. I'm going to believe that all three are accurate.
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The quote you were replying to is actually correct. The "GPS" in your phone is actually derived from cell towers and not receiving a GPS tone from the satellites orbiting the Earth like a true GPS receiver is. This is why you do not get GPS coordinates on your phone when you're in airplane mode, and why you cannot get directions if you turn off the cellular data on your phone. As you move especially in slower movements it is hard for the towers to accurately track (PING) you because you are not moving very fast in relation to them. This is why GPS on your phone is less accurate at slower speeds.