How HD Maps work in self-driving cars
HD maps are essential for self-driving cars. They have a high accuracy of object locations, up to 10 cm. Self-driving cars use HD maps for multiple purposes. It helps to solve the localization problem figuring out where exactly the car is in the world.
https://www.geospatialworld.net/videos/how-hd-maps-work-in-the-self-driving-car/