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The weight of the automotive and tech industries is fully behind the move toward self-driving cars. Cars with “limited autonomy”—i.e., the ability to drive themselves under certain conditions (level 3) or within certain geofenced locations (level 4)—should be on our roads within the next five years.

But a completely autonomous vehicle—capable of driving anywhere, any time, with human input limited to telling it just a destination—remains a more distant goal. To make that happen, cars are going to need to know exactly where they are in the world with far greater precision than currently possible with technology like GPS. And that means new maps that are far more accurate than anything you could buy at the next gas station—not that a human would be able to read them anyway.