Database Develop

[Q] how accurate is the GPS accuracy reading?

With my Cappy, I use GPS Status and it tells me sometimes its 10 metre accuracy but the blue circle on maps is bigger than that. WTF?

It depends if you're using relative GPS or proper GPS.
If you search around you can find out how to use LBSTestMode (which will tell you how accurate and how quick the GPS fix on your position). I'd tell you what the code is to get into that, but it's different depending on what version of Android you have at the moment.

I am running Serendipity 6.2 do i still have access to that?

Yep, you should.
Go to the phone dialer, and put in *#3214789650#
You should see the GPS menu there.

thanks. I got in there now. What do you mean by relative GPS vs proper GPS

Your GPS will get a really rough "guesstimate" of your location really quickly, but it usually takes a while to get your proper location (within 5~40 meters).

There are (at least) two apps which will help you to see what your GPS is doing and why it is reporting what it is reporting. Both can be found in AppBrain and both are in the Market:
Chartcross GPSTest
GPS Status
In addition, GPS Status allows you to refresh the A-GPS data which speeds up the GPS finding satellites from your current position. (I don't think A-GPS data is refreshed automatically by Android; it was in my HTC WinMobile phone).
I think GPSTest is the easier to understand app and you can see the instant a lock is established with each bird. GPS Status reports to you how long it takes to get its first reliable position reading (which takes a minimum of three birds). Although there is overlap in their functions, the two apps together make one fantastic app!
Overall, for the most reliable GPS information, with full position information and fast position updates WiFi should be on and A-GPS data recently updated (which can be kept updated through WiFi). See this: http://en.wikipedia.org/wiki/Assisted_GPS
The way accuracy is determined is by an algorithm which looks at the number and location of the satellites to which the GPS is locked. In general, the more "locked on" birds, the better accuracy will be. The accuracy reading can be misleading. If you have four birds locked and loose two, it will take several seconds to report the change in accuracy. If you are moving and lose and re-lock birds repeatedly, the accuracy value can be 'way off.
BTW, it is the forth "locked on" bird that makes it possible to report altitude.
If where you actually are and where the GPS says you are are not the same, the fault is not exactly attributable to the GPS. What causes this is most likely lost and regained locks on a minimum of three birds. When you are looking at Google Map (for instance) you really don't know what your GPS is doing. At any point in time, Maps could have no consistently useful GPS data (due to the inability of the GPS to "see" three birds). Probably what should happen is the blue triangle should simply disappear unless the GPS is locked on three birds but maybe Google thought that would be un-nerving. So, the blue triangle "wanders" as the GPS "wonders" where you are. Of course, a better SNR in the thirteen receivers which are the GPS would help. When Maps doesn't report where you are correctly, you can see what your GPS is doing with GPSTest. Hope this helps.

[Q] aGPS help on XV6900 android 2.2

Hello people so after a year of messing around I finally got my gps to lock. The problem is that it is not 100%, sometimes it locks and sometimes it doesn't. So my question is like WM is there any way to check and setup aGPS correctly on your XV6900.
I am currently using android 2.2 and I get locks sometimes using GSP test app. It also take anywhere for 1-20 min and I have to be outside the whole time. I think the having the aGPS configured right will be nice. Please help! I will really appreciate it. Another thing I have androind on my rom and no WM installed on the device.

I use GPS Status and Toolbox. You can find it in the market, just search "GPS" its free.

So still did not find a solution. What does work though is using GPS Status and Toolbox manually updating A-GPS the using GPS test to lock. This gives the fastest results. For sime reason GPS Status and Toolbox takes a long time to lock compared to GPS test. I also like the UI of GPS test better.... well this problem is some what solved.

GPS Issues

I've searched for people with a similar situation as mine. Unlike everyone elses... My GPS Locks on but when I'm in the car driving.. it doesn't work like it used to. The GPS is really weak and the arrow in google maps doesn't follow along anymore. Worked fine Since Froyo but I haven't tried going back to that yet. I think I will to see if there's a diff later, don't wanna wipe the phone right now ugh. Weird thing is GPS locks on fine with 3G and even more accurate with WiFi. Just doesn't seem to work well on the road just wondering if anyone has a solution.. Thanks

The arrow on the map does not represent a GPS lock or its status.
Get GPS status from the market. That will give you detailed info about your GPS. Once all the fields on the bottom of that app are filled in you have a GPS lock. Until then you don't.

albundy2010 said:
The arrow on the map does not represent a GPS lock or its status.
Get GPS status from the market. That will give you detailed info about your GPS. Once all the fields on the bottom of that app are filled in you have a GPS lock. Until then you don't.
Click to expand...
Click to collapse
Yep I don't think I said that the arrow is a gps lock. it definitely does lock on.. just doesn't move as my car moves but if I'm at home on 3g it locks on but about 2500m accuracy after about 30 seconds it locks on the correct location. My current solution now is to turn on gps status and then run Google maps. It'd be nice if I didn't have to rely on that. Thanks though

What I am saying is that you don't have a a GPS lock which is why it doesn't move. We are saying the same thing I think just misunderstanding.
Sent from my Nexus One using XDA App

i just find it weird that if i stand in 1 spot the gps will lock on really accurate but when i'm driving it doesnt move with me. That's what I didn't understand .. how was it not locked on when it shows on the map the right spot but doens't when im moving sry.
I have to turn on GPS status and switch back and forth with google maps to have an accurate location which is a pain in the butt and really slow. Never had this issue until I started with gingerbread

The "accurate" one in the beginning is most likely just the regular network location. For example when. I am home with with data signal and wifi the loocation is accurate to about 50 meters. This sounds like the case for you as well.
Still you should not have to load up GPS status to get a lock.
Sent from my Nexus One using XDA App

I am out in a parking lot and accurate to 30meters with GPS off.
But on regular maps it looks Like a GPS lock.
Sent from my Nexus One using XDA App

GPS Status will surely fix you up

Why my GPS and location is messed up?

Hi, my hometown is in assam and i was there a few days before but after coming back here in kolkata when i open my maps or any other location based service it still shows my location back in assam. There were 2-3 times when it showed my actual position but now it doesn't anymore. What the he'll is wrong?
Sent from my LG-P970 using XDA App

You should install a GPS testing program, for example GPS Essentials (https://market.android.com/details?id=com.mictale.gpsessentials ) and see if it can correctly detect the satellites and get your position.
Also, make sure you're in the open when trying to get your position, GPS doesn't work indoors, you need "clear line of sight" to the GPS satellites (so there shouldn't be anything solid above your head, for example a building or a roof).
If GPS Essentials (or any other GPS testing app) gets your position but the position itself is wrong then i really have no idea what could be wrong.
Also, you might want to try one of the GPS Fixes from the forum, they should improve the time needed to get a fix (for me it took about 3-4 minutes without the modification, now it gets a fix in less than 30 seconds).
For GPS Fixes/improvements take a look at http://forum.xda-developers.com/showthread.php?p=22798187 and http://forum.xda-developers.com/showthread.php?p=11342772

I have gps test from the market, and previously it got a perfect fix within 30 seconds from a cold start. But now the program can see 2-4 satellites max but it never gets a fix. I reseted my device twice still no help. I am really torn. I don't understand what's the problem?
Sent from my LG-P970 using XDA App

please read this guy thread:
http://forum.xda-developers.com/showthread.php?p=11342772#post11342772
[DEC.05.2011] Instantaneous GPS Fixation v1.2! *FOR ALL ANDROIDS PHONES!*
I have installed:
- Gps.conf file for asia, includes 24 countries.pool.ntp.org (includes India)
- GPS fix (Qbanin)
- SuplRootCert
it works like a charm for me... lock satelites at 2 minutes in open air (avoid buildings)
or if it doesn't work for you, look for mularameez thread
http://forum.xda-developers.com/showthread.php?t=1494862&page=2
because he's from india too, but my device cant lock sattelite with his method (Im from Indonesia)...
maybe you should try both, and see which one is the best for you
regards...

Very poor GPS performance on s5830i

Ok, I'm fixing this phone for someone who had complained to me that it doesn't ever get a lock. I had downloaded GPS status and found out it hardly discovers any satellites. For comparison's (or rather no-comparison's, lol) sake I was standing outside for almost 2 minutes and all it got was it discovered only 3 satellite(that too in grey) in that time while my galaxy s3 was able to get 12 sat lock in less than 15 secs..
Anyway coming back to the point, is it just only me or its an common issue with this set?
I did try modifying the gps.conf to put NTP and XTRA server in there, however it doesn't seem to do anything. Is there anything which can be done ?

For the FIRST TIME, It will take sometimes to connect to the GPS satellites. Try GPS Test tool to view GPS data and you can clear GPS data from here.
If you are using a custom rom, startover flashing the same.
Sent from my GT-S5830i using xda app-developers app