you have a GPS-enabled device, this blue dot corresponds to your GPS
location. At times, or if you do not have a GPS-enabled phone, you
might see the blue dot surrounded by a light blue circle (as shown on
the right) to indicate uncertainty about your location.
uncertainty? The My Location feature takes information broadcast from
mobile towers near you to approximate your current location on the map
- it's not GPS, but it comes pretty close (approximately 1000m close,
on average). We're still in beta, but we're excited to launch this
feature and are constantly working to improve our coverage and accuracy.
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