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Worth noting that GPS does not rely on cell service.
by standardUser 3y ago
Worth noting that GPS does not rely on cell service.
- Scoundreller 3y agoThe routing does though. I have Google offline maps downloaded for areas I end up in just in this case. Gotta do traffic rerouting the old fashioned way though. Or have an old-school GPS map thingy in your glovebox. (Also have kiwix and a whole archive of Wikipedia on my phone). I wonder if meshtastic communicators sales took off during this. How’s LoRa traffic these days?
- freedomben 3y agoYes, much that we think of as Google Maps relies on API calls made to the backend. Plus this assumes that you downloaded the offline maps ahead of time, which in my anecdotal experience is not something that most people really consider. GMaps does (or did at one time at least) have a neat feature of auto-downloading your home area map but, the one time I needed it, it didn't work.
- Scoundreller 3y ago> which in my anecdotal experience is not something that most people really consider Thankfully I’m in Canada where it’s not impossible to end up in the sticks with no service. Chewing through your handful of gigabytes/month of data wasn’t hard. Only in the past year or so have double digit gigabyte/month data plans become cost-effective. And our roaming prices are extortionate, so for jaunts over the border (or internationally), I’ll sometimes go “naked”.
- ianburrell 3y agoGoogle Maps does offline routing. It doesn't do traffic routing but updating routing is better than nothing.
- bombcar 3y agoThe "Here" app or whatever it is called did offline maps and offline routing decently enough. It wasn't perfect, but it worked for "here to there", even if it didn't find the best possible route.
- a_gnostic 3y agoCarriers have mapping independent of networks. Drivers keep personal GPS too. You would lose traffic and road conditions, I guess, but nothing proper trip planning wouldn't cover.
- Scoundreller 3y ago> Drivers keep personal GPS too. Do they? I know there are a lot of old units out there but I figure people would have tossed them. At least I’ve found Waze has been pretty good at starting off with wifi and loading the map of the whole journey after coverage was lost with some resilience for stops/detours.
- ezfe 3y agoApple Maps has offline navigation with historical traffic included
- 01HNNWZ0MV43FF 3y agoI've been using this on Android for a couple years and love it: https://en.wikipedia.org/wiki/Organic_Maps https://en.wikipedia.org/wiki/Organic_Maps You click a few buttons to download OSM tiles and then it does routing. The latest OSM even has a decent amount of stores, restaurants, etc., listed.
- treflop 3y agoI am consistently in areas with zero cellular service and I’m reasonably sure Google Maps will route offline. At least, I’ve never switched to another mapping app because I couldn’t route — it’s more usually because Google Maps is more primitive areas is kind of detail-less. But even if it doesn’t, there are a ton of offline map apps that use OpenStreetMap data.
- steelframe 3y ago> Or have an old-school GPS map thingy in your glovebox You can also install Organic Maps on your phone.
- LeifCarrotson 3y agoGoogle Maps and now Apple Maps (as of ~6 months ago) have offline maps, but not by default. If you enable and download them for your area of interest you can use a subset of the normal app. I make sure to have this around my usual area and anytime I travel to an area with poor coverage, plus my Garmin watch has offline maps and GPS everywhere, but this is not typical. OSMand usage is even less common.
- tnel77 3y agoOffline maps are a life saver in areas with bad coverage. One of the first things I setup for a new phone or when I’m headed somewhere new on vacation.
- freedomben 3y agoThis is one of the most interesting differences I often notice between users who rarely leave the city and those who routinely leave. Offline functionality often seems unnecessary at best and absurd at worst to the former group, while the more rural/remote the person the more they value offline functionality. For the most extreme example, talk to the average person who lives outside of Anchorage or Fairbanks in Alaska, and they only really care what the app can do when it's offline as that is it's assumed status when on the go (disclaimer: I moved out of alaska a little over 5 years ago so things might have changed somewhat).
- ghaff 3y agoYeah, if I'm going to travel internationally or if I'm somewhere I know I'll have spotty cell service, I'll download maps. I should probably be better about doing it in local areas where I "assume" things will be fine.
- tnel77 3y agoI grew up in a rural area and lived in Colorado for a while. Going home or venturing into the mountains often resulted in bad service so it just became second nature. Good observation!
- 3y ago
- fhdkweig 3y agoagreed. On Google Maps app, there is a feature called "offline maps" which allows a user to select a rectangle on a the map and download all the street info inside it. A whole US state can fit in less than a few hundred megabytes. I have all the city I live in downloaded so I can go on walks without needed to use my data plan.
- a_gnostic 3y agoNot as useful as back when google maps required a 5GB download IIRC
- herbst 3y agoDownloaded a whole island yesterday. Was 40mb. That's a lot better now, has less resolutions packed in tho.
- jader201 3y agoThat's assuming you have it on and updated before you hit the road. I think it's off by default, and I'm guessing most people haven't thought to turn it on, or are even aware of it.
- patmorgan23 3y agoI'm pretty sure maps caches the data around you if you've used it somewhat recently. It saves Google bandwidth too.
- jader201 3y agoI’m not so sure. Anecdotally, I’ve made it to a remote destination using Maps, then hopped back in the car an hour later (with no signal), and it couldn’t load anything. This seems to happen quite often.
- Scoundreller 3y agoMaps used to expire after 30 days (no idea why), and the auto-updating while on wifi wasn't great unless you were in the app forcing it update. Nowadays they last 365d.
- offmycloud 3y agoGPS on most cell phones uses data connection to download current satellite data in order to decrease the time from cold start to GPS lock. Lack of cell or WiFi can cause GPS to take 5-15 minutes to "search the sky" and download satellite data via low bitrate channel under poor signal conditions. https://en.wikipedia.org/wiki/Assisted_GNSS https://en.wikipedia.org/wiki/Assisted_GNSS Edit: You can think of it as a CDN for the GPS almanac.
- sobriquet9 3y agoFrom cold start. Most starts are not cold. The phone knows where it is, approximately, what time it is (within a second or so, from built-in RTC), and orbital parameters of the satellites overhead (maybe without the latest corrections). My Garmin watch gets a GPS lock in way less than 5 minutes without any cellular connection.
- rany_ 3y agoActually, your Garmin probably gets A-GPS data uploaded to it via the app. I think that because Huami/Amazfit/Xiaomi smartwatches already do that. We know this from reverse engineering efforts in Gadgetbridge, but support for Garmin is still new and so there isn't as much info about it; either way it probably works in the same way.
- scarface_74 3y agoMy first GPS Garmin watch used for running back in 2011 didn’t have an app and didn’t have any cellular signal. I put it on my wrist and started running. I don’t remember it taking more than a minute to get a signal.
- sobriquet9 3y agoNo, it's not paired to the phone, and there is no Garmin app on the phone either.
- dfadsadsf 3y agoThat’s just not true for modern phones. I use iPhone on hikes without cellular connection and GPS lock is instantaneous. Organic Map app is great for hiking.
- rpd9803 3y agoworth noting that without cell service, GPS can reliably give you time, lat, long and elevation. So if previously you had no actual map downloaded, or an old or out of date map, you'd just get a pretty accurate dot on an inaccurate map, or just raw coordinates.