CNN on the big business involved in creating detailed maps—called HD maps—for self-driving cars. “If you believe self-driving cars will eventually operate everywhere, then every city and street will need to be mapped out in granular detail.” How granular? During one test, a single-pixel error on one map caused cars to avoid a patch of road as though it was raised 10 inches. [Osher]

Previously: Human-Annotated Maps for Self-Driving Cars.