GPS calculates wrong mileage? - Nexus 4 Q&A, Help & Troubleshooting

Anytime I run an app like MyTracks or MapMyRun or Strava, my GPS is spot on but it calculates the miles wrong. It also get's progressively worse as it gets farther along. It starts saying 1 mile is at about .7 miles, then 2 miles at like 1.3 miles by the time I hit about 8 miles I've really only gone about 4.
Anyone have any idea? It's really driving me nuts. I'm running Vanilla Rootbox with franco kernel. I had this problem with two different versions of both the rom and the kernel, I doubt it's related to those.

Sounds like it's a app issue.
If your gps is spot on then the gps is working as it should.
All calculations on distance traveled would be done by a app reading the gps info. So if your gps is accurately reporting your location it's not at fault.
Sure the apps aren't giving you results in km? Sounds like it may be just that.

albundy2010 said:
Sounds like it's a app issue.
If your gps is spot on then the gps is working as it should.
All calculations on distance traveled would be done by a app reading the gps info. So if your gps is accurately reporting your location it's not at fault.
Sure the apps aren't giving you results in km? Sounds like it may be just that.
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Click to collapse
That's what I thought too, but I doubt 3 apps are miscalculating the same way.Its not in km, first thing I checked
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The correct answer is GPS isn't 100% accurate its always off by at least 10m which adds up over the course of 4 miles. This isn't an issue with the nexus 4 it happens on all phones.
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konthewicked said:
The correct answer is GPS isn't 100% accurate its always off by at least 10m which adds up over the course of 4 miles. This isn't an issue with the nexus 4 it happens on all phones.
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Click to collapse
That's not even close to the correct answer. Thanks though!
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konthewicked said:
The correct answer is GPS isn't 100% accurate its always off by at least 10m which adds up over the course of 4 miles. This isn't an issue with the nexus 4 it happens on all phones.
Sent from my Nexus 4 using xda app-developers app
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Click to collapse
Correct.
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MikeyCriggz said:
Correct.
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Click to collapse
Eh. Unfortunately that's not how gps "tracking" (or math) works.
I don't think either of you actually read the problem, or I just explained it like ****. Gps Accuracy is not the issue, even the speedometer was correct. Only the mileage was off.
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Related

[Q] How's the GPS?

I know the Samsung Galaxy S series aren't too stellar when using GPS; how is it on the S3?
bigb252 said:
I know the Samsung Galaxy S series aren't too stellar when using GPS; how is it on the S3?
Click to expand...
Click to collapse
Haven't tested it on a drive yet. But it came up and hooked up virtually instantly in maps today. From inside my house. Never able to even hook up on my Captivate in the house, let alone quickly.
Fingers crossed...
Used it today for about 50 miles and it never dropped once. Did awesome. I was so used to my old captivate I almost forgot that a phone GPS can actually work.
It locks fast and stays locked
It was just the galaxy s 1 that had this issue. Sgs2 gps worked perfectly and same with sgs3 both lte and international
Sent from my GT-I9300 using XDA
bigb252 said:
I know the Samsung Galaxy S series aren't too stellar when using GPS; how is it on the S3?
Click to expand...
Click to collapse
I used the Charing Cross app to test, and it was impressive for the number of satellites detected in my area which is partially blocked due to a hill, but it took a minute or two to go from accuracy of 260 ft down to 9.1ft. I had a Google maps navigation started cold, that showed my start a block away from where my blue arrow was actually located on the map.
Sent from my SAMSUNG-SGH-I747 using xda premium
On the official Samsung site, it says GPS, rather than a-GPS. I did test it here in San Diego - cached my area, airplane mode, reboot, and maps got a tight fix on me in under a minute (closer to about 20 seconds).
Sent from my SAMSUNG-SGH-I747 using XDA
Accuracy of 3 m in about 6 seconds.
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quick accurate lock with mine as well. maybe sammy is finally starting to figure things out ;-)
2
When sitting in my bedroom the gps says that I am in my neighbors house.
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bigb252 said:
I know the Samsung Galaxy S series aren't too stellar when using GPS; how is it on the S3?
Click to expand...
Click to collapse
Absolutely fantastic. Best I have ever seen. Phone saw 20 Sats and was able to lock in on 12 in about 15 seconds. Within 9 feet accuracy which is best I've seen here in Hawaii.

[Q] [q] strange battery life on the n4

Just got my new Nexus 3 days back.. and today was the first day using the phone not plugging it on and off thorough the day.
noticed something odd. I hadn't opened the maps app.. so it makes it even more strange.
any ideas?
Maps always runs itself. I believe this can be remedied by turning off location settings.
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Which app is that by the way? And turn off location settings and latitude.
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I just disabled maps
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droidmakespwn said:
Maps always runs itself. I believe this can be remedied by turning off location settings.
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Click to expand...
Click to collapse
the even more curious part was that the app had run only for 34seconds!
not faced the problem today, hadn't changed any settings. guess it will remain a mystery until it happens again?
Someone was having a similar problem a few weeks back. Try going from maps to navigation and accepting the user agreements etc. Someone found that this solved the maps battery drain.
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karanrajpal14 said:
Which app is that by the way? And turn off location settings and latitude.
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Click to expand...
Click to collapse
https://play.google.com/store/apps/details?id=com.gsamlabs.bbm.pro
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Endoran said:
Someone was having a similar problem a few weeks back. Try going from maps to navigation and accepting the user agreements etc. Someone found that this solved the maps battery drain.
Sent from my Nexus 4
Click to expand...
Click to collapse
+1
This was an issue on galaxy nexus when updating from 4.0 to 4.0.1 .all you had to do is to go to maps accept t&c and that's it.
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New maps update?

Has anyone heard of this or downloaded it? Its apparently just for *bug fixes* I wonder if this fixes some of the map draining issues.
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There is no "battery drain" with the app itself. What you are seeing is the location services. It shows up as maps in the battery monitor.
The more location services you have activated, the more you will see battery usage.
Sent from my Nexus 7 using xda premium
Yea I know that but even when I had maps and Google now active on my old Gnex my battery life wasn't hit anywhere near as bad as it is on the N4. I'm sure many can attest to that. That's why I was wondering.
Could it be more do to the os running on the N4 different than the nexus?
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Nocturnal86 said:
Yea I know that but even when I had maps and Google now active on my old Gnex my battery life wasn't hit anywhere near as bad as it is on the N4. I'm sure many can attest to that. That's why I was wondering.
Could it be more do to the os running on the N4 different than the nexus?
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
It's the way the kernel is developed. When you touch the screen on stock kernel, it ramps up the frequency to 1000.
And some people saying that min freq is 1000 and max freq is 1500
I've haven't noticed much difference between the gnex and N4 with maps usage. I have noticed that turning off latitude and "report from this device" drastically lowers battery usage.
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zephiK said:
It's the way the kernel is developed. When you touch the screen on stock kernel, it ramps up the frequency to 1000.
And some people saying that min freq is 1000 and max freq is 1500
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Click to collapse
Oh really well if that's the case do you think that would he fixed in a software update? Cause I'm gonna stick to stock right now till more ROM development matures.
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El Daddy said:
I've haven't noticed much difference between the gnex and N4 with maps usage. I have noticed that turning off latitude and "report from this device" drastically lowers battery usage.
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Click to expand...
Click to collapse
Well that was the first thing I noticed when I was using it. The maps would drain and GPS would get stuck and still gets stuck on with certain apps. So I just turn off and force close maps now and my battery is much better. Not great but better.
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GPS cycling/running tracker.

Anyone know any app that is wotking fine with our Nexus? I have tried a few but all of them are not acurate at all. Showing odd speeds and distances...
Maybe my phone is broken?
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wazka2 said:
Anyone know any app that is wotking fine with our Nexus? I have tried a few but all of them are not acurate at all. Showing odd speeds and distances...
Maybe my phone is broken?
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Click to expand...
Click to collapse
I use endomondo.
Seems very accurate to me.
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drpepe said:
I use endomondo.
Seems very accurate to me.
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Click to expand...
Click to collapse
Tried it today and it showed me I was cycling at 326km/h... I am on Cm10.1 and Franco 28. Are you on stock?
Update:
Just tried My Routes from Google and it seems to work fine
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wazka2 said:
Tried it today and it showed me I was cycling at 326km/h... I am on Cm10.1 and Franco 28. Are you on stock?
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Click to expand...
Click to collapse
Yikes, something isn't right. How do things like Google maps, locations in Facebook etc work on your phone?
I'm stock, rooted.
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I'm having similar issues: I'm using MapMyRun on Xylon/Franco, and it reports very strange distances. It's very weird because I can pull up the map on the app, and it looks right. When I upload the route to their web interface and access it from my computer, the distance gets calculated correctly. But the phone vastly overestimates the distance traveled (up to 10x--i.e. 30 miles for a 3 mile run).
Google maps and Foursquare are dead on, and GPS activates quite quickly.
---------- Post added at 06:18 PM ---------- Previous post was at 06:09 PM ----------
I just saw we're both using Franco's kernel. Maybe that's the problem?
direwolf1 said:
I'm having similar issues: I'm using MapMyRun on Xylon/Franco, and it reports very strange distances. It's very weird because I can pull up the map on the app, and it looks right. When I upload the route to their web interface and access it from my computer, the distance gets calculated correctly. But the phone vastly overestimates the distance traveled (up to 10x--i.e. 30 miles for a 3 mile run).
Google maps and Foursquare are dead on, and GPS activates quite quickly.
---------- Post added at 06:18 PM ---------- Previous post was at 06:09 PM ----------
I just saw we're both using Franco's kernel. Maybe that's the problem?
Click to expand...
Click to collapse
Also if you dont wait until Endomondo says GPS ok in the bottom left of the screen the it uses the last know GPS location, and moves you to where you actually are when it gets GPS lock. I hav experienced this on ALL older devices (havent been out with the N4 yet)
RunKeeper has been working fine on the other Nexus 4 in my house (distances are almost exactly the same as the Inc's were).
wazka2 said:
Anyone know any app that is wotking fine with our Nexus? I have tried a few but all of them are not acurate at all. Showing odd speeds and distances...
Maybe my phone is broken?
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
http://www.sports-tracker.com/
SportsTracker works perfectly for me. Much better than on the crappy GPS of my g2x, and better than my old Nokia c7.
Much better than Endomodo
Sent from my Nexus 4 using xda premium

Note 4 GPS Accuracy

I'm not getting great gps accuracy with this phone. Usually between 16-30 feet. My other devices are accurate up to 3 feet. I'm wondering what everyone else is getting with this phone. Using GPS status from the play store.
I just tested. I'm getting 10-12 feet.
Sent from my SM-N910T using XDA Premium HD app
gps signal drops
I noticed that when I am using a map program like Waze or google Maps, the gps signal gets lost more often than when I had the Note 3.
raiders13 said:
I noticed that when I am using a map program like Waze or google Maps, the gps signal gets lost more often than when I had the Note 3.
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Click to collapse
I notice this as well. My old S3 was very accurate, whereas the Note4 seems to "jump" around.
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10 feet
deeznutz1977 said:
10 feet
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Click to collapse
What app are you using for this?
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Temetka said:
What app are you using for this?
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Click to expand...
Click to collapse
That's GPS Test /GPS Test +(paid). Great app.
I've noticed this as well when playing the game ingress. I wonder if it's due to the steel frame? My Galaxy Note 3 and Galaxy S5 was spot on.
Hmm.
Never thought about that.
My GPS does seem to perform better now that I have FireKat ROM on my phone.
Re tested.
Rooted running Firekat ROM and using some tweaks from the lag thread. GPS assist is running in the background.
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I too tested it on FireKat and got the same results. 10 ft. Makes me think it can be enhanced by a software update. Maybe in a future patch.
atrohde said:
I'm not getting great gps accuracy with this phone. Usually between 16-30 feet. My other devices are accurate up to 3 feet. I'm wondering what everyone else is getting with this phone. Using GPS status from the play store.
Click to expand...
Click to collapse
Depends on your location and how many satellites are in sight but ~3 meters/~9 feet is about as good as it's going to get with just GPS. Maybe if phone locks into some Glonass satellites it could do a bit better.
Temetka said:
I notice this as well. My old S3 was very accurate, whereas the Note4 seems to "jump" around.
Sent from my SM-N910T using XDA Premium HD app
Click to expand...
Click to collapse
I made a change on the WiFi settings and my GPS signal improved. I put a check on "Always Allow Scanning." Because I remembered that I had taken it off to try another app and that was around the time that GPS stopped working correctly.
go to Settings>Wi-Fi>Advanced>Always Allow Scanning; Put a check on this option.
Google maps says GPS signal lost a lot with the note 4... doesn't seem very good at getting a location.
Definitely love the phone. Came from the s4. My first note. Thought I was the only one that noticed crappy GPS signal
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I notice my phone says searching for GPS in the drop down thing. Goes away in a few seconds but is annoying.
10' Lock almost Instantly. Fastest lock of any phone I ever owned. And keeps its lock perfectly.
Here's my VIDEO
My GPS works great on my phone.
---------- Post added at 02:32 PM ---------- Previous post was at 02:31 PM ----------
Even to the room I'm at. Best GPS I've had on a phone
raiders13 said:
I made a change on the WiFi settings and my GPS signal improved. I put a check on "Always Allow Scanning." Because I remembered that I had taken it off to try another app and that was around the time that GPS stopped working correctly.
go to Settings>Wi-Fi>Advanced>Always Allow Scanning; Put a check on this option.
Click to expand...
Click to collapse
Won't that eat battery more?
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I checked the scanning off because when driving using the maps WiFi spots pop up and I can't see where I'm going. LoL
To all those who saying they don't have issues with the GPS they probably don't use it enough to see that.

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