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Apple Maps claims it's 29,905 miles away

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Re: Apple Maps claims it's 29,905 miles away

#41

Post by kbutler »

monerozcash wrote: post #21

While we're on the subject of maps-related bugs, I was recently borrowing a new Tesla Model Y and took it on a RORO ferry. After the crossing, the car’s GPS was convinced I was still at the port where I had departed from. I restarted it a couple of times, but nothing. I drove off using Waze on my phone instead of the car's navigation. The map on the car kept moving relative to the direction I was driving, so the navi…

Looks like others have reported similar issues. Entering a navigation route may help?

https://teslamotorsclub.com/tmc/threads/map-location-and-rou...

Re: Apple Maps claims it's 29,905 miles away

#42

Post by hnlmorg »

stockresearcher wrote: post #32
monerozcash wrote: post #21

While we're on the subject of maps-related bugs, I was recently borrowing a new Tesla Model Y and took it on a RORO ferry. After the crossing, the car’s GPS was convinced I was still at the port where I had departed from. I restarted it a couple of times, but nothing. I drove off using Waze on my phone instead of the car's navigation. The map on the car kept moving relative to the direction I was driving, so the navi…

I had a Volvo XC90 that “jumped” off the interstate and onto a parallel mountain road east of Knoxville. It did its best to track along those roads and somehow made its way into North Carolina. But even when I was back in Chicago, it was still stuck in NC trying to find a way off those mountain roads. Dozens of on/off cycles did nothing. I disconnected the battery overnight and that didn’t work. At the next service a…

The problem is that roads are continually being built and maps aren’t always as quick to be updated.

There are also private paths that aren’t public roads but are still intended for vehicles.

Re: Apple Maps claims it's 29,905 miles away

#43

Post by worewood »

stockresearcher wrote: post #32
monerozcash wrote: post #21

While we're on the subject of maps-related bugs, I was recently borrowing a new Tesla Model Y and took it on a RORO ferry. After the crossing, the car’s GPS was convinced I was still at the port where I had departed from. I restarted it a couple of times, but nothing. I drove off using Waze on my phone instead of the car's navigation. The map on the car kept moving relative to the direction I was driving, so the navi…

I had a Volvo XC90 that “jumped” off the interstate and onto a parallel mountain road east of Knoxville. It did its best to track along those roads and somehow made its way into North Carolina. But even when I was back in Chicago, it was still stuck in NC trying to find a way off those mountain roads. Dozens of on/off cycles did nothing. I disconnected the battery overnight and that didn’t work. At the next service a…

A badly programmed Kalman filter perhaps

Re: Apple Maps claims it's 29,905 miles away

#44

Post by theamk »

hnlmorg wrote: post #42
stockresearcher wrote: post #32

Earlier quoted context omitted.

I had a Volvo XC90 that “jumped” off the interstate and onto a parallel mountain road east of Knoxville. It did its best to track along those roads and somehow made its way into North Carolina. But even when I was back in Chicago, it was still stuck in NC trying to find a way off those mountain roads. Dozens of on/off cycles did nothing. I disconnected the battery overnight and that didn’t work. At the next service a…

The problem is that roads are continually being built and maps aren’t always as quick to be updated. There are also private paths that aren’t public roads but are still intended for vehicles.

That's no excuse for disbelieving GPS for extended periods of time.

Google Maps gets it right: it tried to keep you on road, but only for a few tens of seconds. After that, if you are in the middle of uncharted territory, it'll show the marker there.

(This is probably because Google Maps can be used for walking/biking too)

Re: Apple Maps claims it's 29,905 miles away

#46

Post by lugao »

mjd wrote: post #23
lugao wrote: post #13

[flagged]

The path taken did not traverse the boundary of every atom along the way, or even every grain of sand. Even if it had, the airtag location service is not accurate enough to have detected that.

Not really, if you had every grain of sand in the way it would diverge to a much bigger value. The problem is that the roads have >1 dimension at that scale, apple maps is definitely adding up to many details along the way, it's not a straight line and it ends up being 10x the actual distance. No Biggie.

The "fix" is to smooth those details as the straight line distance grows bigger.

Re: Apple Maps claims it's 29,905 miles away

#47

Post by somenameforme »

monerozcash wrote: post #21

While we're on the subject of maps-related bugs, I was recently borrowing a new Tesla Model Y and took it on a RORO ferry. After the crossing, the car’s GPS was convinced I was still at the port where I had departed from. I restarted it a couple of times, but nothing. I drove off using Waze on my phone instead of the car's navigation. The map on the car kept moving relative to the direction I was driving, so the navi…

A practical issue is that GPS can be spoofed relatively easily. If autonomous driving became a thing, and ubiquitous, with vehicles that prioritized remote over local consistency, then a single GPS spoof could cause some interesting things to happen. This is probably a concern that does drive decisions, at least to a degree. It creates a weird scenario where you kind of need to trust GPS, but you simultaneously also can't treat it as authoritative.

OTOH creating a dumb user experience for a fairly common scenario, to try to preempt a hypothetical scenario is probably not a great idea. A fun problem to think about, though it may be completely unrelated to this issue.

Re: Apple Maps claims it's 29,905 miles away

#49

Post by pjsg »

monerozcash wrote: post #21

While we're on the subject of maps-related bugs, I was recently borrowing a new Tesla Model Y and took it on a RORO ferry. After the crossing, the car’s GPS was convinced I was still at the port where I had departed from. I restarted it a couple of times, but nothing. I drove off using Waze on my phone instead of the car's navigation. The map on the car kept moving relative to the direction I was driving, so the navi…

I suspect that my Tesla adjusts its location based on dead reckoning after losing GPS lock except that it assumes that I'm driving forwards. I.e. If I reverse out of my garage, then the map ends up in the wrong place and now I'm driving parallel to the road!

Re: Apple Maps claims it's 29,905 miles away

#50

Post by lxgr »

Etheryte wrote: post #8
1317 wrote: post #2

context?

The distance is more than the circumference of the Earth. If you wrapped a rope around the planet at the equator, the length would be around 25k miles.

Some roads aren’t perfectly straight (not that this seems like it could explain what happened in this particular case).
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