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A comment on Tesla Intrigue Deepens with Musk's Twitter Barrage. Parent comment

Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by Laaw on Monday April 04, 2016 @10:25AM (#11422071)
Self driving cars don't use GPS, it is not reliable or granular enough.
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Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by rpedela on Monday April 04, 2016 @10:28AM (#11422108)
At all? How would it drive to the mall on the other side of town without GPS?
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Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by TillE on Monday April 04, 2016 @10:34AM (#11422161)
A map, plus the assumption that it never moves without being powered on.

(I'm sure it does use GPS for navigation. But it's hypothetically possible to do without.)

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Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by talmand on Monday April 04, 2016 @11:34AM (#11422655)
Seems like it might need GPS at times, or some other means to know where it is at certain moments. Once it establishes where it is then I could see it no longer needing GPS, as it should be bright enough to keep track of location by itself using a map.
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Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by chucksmash on Monday April 04, 2016 @01:26PM (#11423664)
Using just dead reckoning you would pretty quickly have issues with accumulated error.
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Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by gregmac on Monday April 04, 2016 @02:22PM (#11424098)
Apparently not. There's a pretty fascinating story about Etak, who made a dead reckoning-based car navigation in the mid 1980's: http://www.fastcompany.com/3047828/who-needs-gps-the-forgott...
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Re:Tesla Intrigue Deepens with Musk's Twitter Barrage by Laaw on Monday April 04, 2016 @04:21PM (#11425232)
Directions plus a bevy of road sensors. Basically the same way you do.

It may use GPS supplementally, but never primarily.

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