Google does not know who you are when you use the My Location feature in Google Maps for mobile. All handsets are anonymous. When you use Google Maps on your mobile device, we do not collect personal information like your username or phone number, so we do not know who owns or is using the handset.
For Android users, if the My Location feature is disabled, we will not continue to send radio information back to Google servers to determine your handset's approximate location while you use Google Maps for mobile.
For iOS users, if you have disabled Location Services, your approximate location will not be sent to Google.
In order to provide you with better traffic data, we collect anonymous samples of speed and location. When you request driving directions or search the map, your query is sent to Google as a standard directions request, and it is not associated with your personal identity in any way. Learn how to disable your network location.
Google Latitude (for Android devices)
My Location and Google Latitude are two separate features for Google Maps for mobile and can be enabled or disabled independently. My Location provides Google Maps for mobile with your approximate location so that you can zoom in on your current location or search for nearby businesses easily. While Latitude associates your location with a Google Account and shares it with your selected friends, My Location does not associate your location with an account or phone number. You can disable Latitude at any time by signing out and still continue to use My Location for maps.