The round, sky-blue magnet or sticker could be stuck to the back of a car. On it was a Web address, thebluedotproject.org , where women could go to find information and support. Advertisement ...

How Uber moves the ‘blue dot’ to improve GPS accuracy in big cities. GPS can’t see through tall buildings, so Uber set out to fix the problem using 3D maps, probability, and math.

If there’s no GPS signal and the blue dot can’t do its magic, Google Maps automatically refreshes and displays the last known location. Nevertheless, once the application is again able to ...