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My iPhone 12 has much better reception then my 22 Tacoma even when tossed on the passenger seat. Like waaaaaay better and more accurate
by katbyte 2y ago
My iPhone 12 has much better reception then my 22 Tacoma even when tossed on the passenger seat.
Like waaaaaay better and more accurate
- withinboredom 2y agoIt just pretends to be more accurate by using AI. A car tends to be more raw, which is what you want when navigating at speed. As someone who used to help out with Waze maps, raw GPS tracks from phones can be WAAAY off from actual roads and other GPS tracks. Your phone looks for the most likely road for you to be on and snaps you to that road. Your car does a similar thing but has much higher GPS resolution than your phone so it is more likely to be right.
- WesolyKubeczek 2y agoCould we please for once stop using the term "AI" when we mean "heuristics"?
- withinboredom 2y agoPhones do use AI though, at least iPhones. They look at all sensors (accelerometers, gps, wifi, etc).
- lupusreal 2y agoSensor fusion is AI I guess.
- withinboredom 2y agoAI can be distilled down to a series of if-statements. That's basically all it is.
- lupusreal 2y agoRight, expert systems are GOF AI. What isn't?
- fennecbutt 2y agoThis is true of literally any software and if you really wanna oversimplify it, our brains are just a bunch of if statements (condition based logic) too...
- withinboredom 2y agoI noticed too late to add /s or to attribute the quote, but kinda sad that people are taking it literally. It’s a play on the quote “Life is a series of choices and reactions” from “Before The Fall”
- WesolyKubeczek 2y agoGosh, so the moment you use an if-statement, or an aggregate function (like sum or average), or weighting coefficients to mark some inputs as more significant than others, it's "AI" already? And I naïvely thought it was just, well, "computing". You could do "AI" on a 8086, ffs.
- withinboredom 2y agoYeah, forgot the /s ... wasn't being serious.
- rusticpenn 2y agoheuristics and Meta-heuristics are AI. Heuristics are how children (and adults) learn to solve new problems.
- katbyte 2y agono it IS more accurate. When i am off-roading i always record my track and have to unplug my phone from the trucks system to get an accurate un-smoothed track. google maps does weird things but gaia just uses the raw GPS data from the phone and doesn't snap, however when you are plugged into carplay the phone seems to always consider the car/trucks data more accurate even when its clearly not. this could very well my specific truck (dealer has refused to look and i don't have another to compare to) or a general tacoma thing but it both smooths the GPS data to make "nicer" looking lines and often introduces drift over time as likely some processing it does compounds an error (i also realize i said the wrong phone, iphone 14 not 12 but even with the 12 it was notably better then the truck but the 14 pro has a much improved GPS and it shows)
- withinboredom 2y agoAFAIK, and I could be wrong (though I did google this first), plugging your phone into CarPlay does not use the car’s gps unit. That’s just your phone trying to find a road because it’s connected to a car. Even if you are getting the car’s gps, it’s not going to give you raw values, but display values to show in an app, which should be smooth, IMHO.
- astrange 2y agoNo, it does use the car's GPS unit if it's provided to the phone. Which is why I started this thread by saying it did.
- katbyte 2y agohttps://discussions.apple.com/thread/250076351?sortBy=best https://discussions.apple.com/thread/250076351?sortBy=best > If your vehicle has wireless CarPlay, the iPhone's GPS chip is completely ignored. > If your vehicle has wired CarPlay, the iPhone's GPS chip may be ignored, depending upon what the head unit tells the phone to do. this happens when near roads or not. the truck is doing something weird and wrong with the GPS data and forcing the phone to use it
- t0mas88 2y agoBut the in-car unit has both GPS (with the antenna being on the roof) as well as wheel speed. Noticeable in longer tunnels with traffic jams that make the speed vary. Then it's clear Google maps takes a random guess at where you are while the in-car system knows how far along you are.
- katbyte 2y agothe only time i am paying attention is when off-roading and recording a track, and then its very obvious when the GPS is doing a good or bad job and unplugged from carplay i get a far more accurate track.
- beagle3 2y agoPhones also use WiFi access points and some Bluetooth beacons to get a better location. AFAIK only Google and Apple have up-to-date maps of these that are useful for navigation, and no one else does (Mozilla threw the towel a year or two ago). Cars can theoretically have better GPS antennae, and can do better dead reckoning using wheel position and wheel rotation speed. But do they? I haven’t seen any evidence that any car actually does better than a modern phone. Especially inside a dense city, WiFi location can be much more precise than GPS.
- katbyte 2y agoi only really care about accurate when off-roading in the middle of nowhere with no reception and recording my track - my iphone performs far better when unplugged from the truck then when plugged into it.
- astrange 2y agoThat's possible too, but the issue I was thinking of wasn't exactly reception - it's that GPS signals bounce off buildings and so it looks like you're somewhere else. Stronger reception might actually make that worse. Japan has local satellites to help with this (QZSS) and local cars may handle that better than global phones.