NTNU researchers have built SmartNav, a system that overcomes urban GPS errors using satellite corrections and Google’s 3D data. It achieves near-centimeter precision, paving the way for safer, more reliable self-driving cars. Credit: Shutterstock Most of us rarely question the accuracy of the GPS dot that shows our location on a map. Yet when visiting a new city and using our phone to navigate, it can seem as if we are jumping from one spot to another, even though we are walking steadily along