[Q] A-GPS on HTC 7 Mozart - Windows Phone 7 General

I have used Xperia X1 for a long time, before I changed to HTC 7 Mozart.
When I used X1, with Google maps, when I stayed inside my house, it will automatically changed to A-GPS, with a circle around my position.
But with my HTC 7 Mozart now, when I'm in my house, Bing Maps only "Searching ..." with no result, while other apps like JustAnotherMaps, TAMaps, Advanced Maps Viewer also have no respond at all.
// of course it respond perfectly when I'm outside.
Is there any problem with my Mozart?

1. goto settings > system (pivot, you'll be on this already) > location... make sure it's on.
2. goto maps > hit the me icon at the bottom (middle one)
3. if fail, turn off and on the phone and try maps again.
if nothing is showing, try and go outside and give it a couple of minutes and see if it locates you.
if you do not get aGPS (it looks the same as what you described, with "my position" being a diamond with a circle in it) and you do not get a positive lock... you probably have a fault device and you might want to try and exchange it for a new one.
the aGPS is pretty much instant on my phone and the proper GPS is reasonably close behind.

oh really
Can you show me the image(s) that aGPS is currently working on your device?
Thanks

There's no specific image to show, it just determines location, that's it. It certainly works for me. Whether it does or not depends on whether the service Microsoft is using to determine cell Tower locations is available and is correct for your location.

I'm in Vietnam now, and I don't know that M$ have supported my country or not :|

kirimaru89 said:
I'm in Vietnam now, and I don't know that M$ have supported my country or not :|
Click to expand...
Click to collapse
That's the problem. The feature you asked is not a-GPS, but rather cell tower triangulation. It largely depends on whether or not the pariticular serivce (Bing or Google) has exntensive collections of cell towers in your location or not. In this case, it seems Bing or Microsoft doesn't have the database for cell tower locations in Vietnam but Google does.
aGPS is a totally different feature. It is used to speed up GPS initial lock using assitance from the cell data network.

found me sitting at my computer in under 5 seconds....
Guess if the gov't wanted to find me it wouldn't be hard!

foxbat121 said:
That's the problem. The feature you asked is not a-GPS, but rather cell tower triangulation. It largely depends on whether or not the pariticular serivce (Bing or Google) has exntensive collections of cell towers in your location or not. In this case, it seems Bing or Microsoft doesn't have the database for cell tower locations in Vietnam but Google does.
aGPS is a totally different feature. It is used to speed up GPS initial lock using assitance from the cell data network.
Click to expand...
Click to collapse
Yes that pretty much explains my situation I described in other thread.
On my device - LG E900 - I get GPS position (outdoors) but no triangulation data.
I don't see any circle either. I live in Poland where Bing maps are pretty poor.
But GPS works.

I've searched, and I think that the only reason for this problem is M$ now doesn't have the data about Cell Tower in VN (and other countries)
Hope M$ will add more data soon.

Waiting for nokia help microsoft support in all country.

Related

New Google Maps, includes low end software based GPS for Hermes

www.google.com/gmm
I did not see this when I searched so I thought I would post it.
Latest version of google maps (2 beta) is out and it includes my location (tower based locater)
Its not great but depending on your location it can give pretty good fix as to where you are (and provide directions/searches nearby). Pretty useful tool, I find the performance better than Navison.
I always wondered why a gps locations couldnt be created using cell phone towers!
Thanks for the heads up!
Downloading now!!
When you click on Menu click My Location to find your location via softgps.
Aww..my location is temporarily unavailable
*edit*
This works better when NOT connect to computer via USB cable LOL
This is totally sweet!
Wow, very nice. Just tried it out and it is accurate to a few blocks.
I've been using for a while now...I like it.
Gives you a decent starting point as opposed to typing in address. In directions...just use "my GPS Location" as a starting point and it will use the nearest tower as your starting point.
Looks like I might hold off on the tilt a bit longer. ($149 on premier has me tempted)
-AD
Very cool! Simple, Fun, & Progressive for our non-gps Hermes!
Well I installed it and My location is not available.... But thinking about it I read somewhere that it uses Celular broadcast, and I am afraid T-Mobile NL does not provide celular broadcast maybe because it is an 1800 MHZ network ???
Google Maps 2
This is an uterly brilliant program! For the first time, I can use my phone, without a GPS receiver, to find my approximate location, view the map or satellite picture, and find the nearest pub, garage, hotel etc. Wow!!
Works like a charm here! Pretty amazing stuff. We just went out tonight, got hungry, wanted pizza....and google told us where to go!
Churchill said:
Well I installed it and My location is not available.... But thinking about it I read somewhere that it uses Celular broadcast, and I am afraid T-Mobile NL does not provide celular broadcast maybe because it is an 1800 MHZ network ???
Click to expand...
Click to collapse
Probably. Couldn't get it to work either.
Isnt Proximus Belgium 1800 Mhz too? Works here and very accurate.
Can confirm also works well on Telstra (Australia) GSM/UMTS networks.
Nifty bit of software.
Many thanks to aaronsmckee for alerting us to it.
Churchill said:
Well I installed it and My location is not available.... But thinking about it I read somewhere that it uses Celular broadcast, and I am afraid T-Mobile NL does not provide celular broadcast maybe because it is an 1800 MHZ network ???
Click to expand...
Click to collapse
That might be it... or it may be that Google has not added the tower id number for NL yet (it is still in beta). The way the app works is that it draws down the tower id number from the tower your using to connect with. Then it matches it up against a DB that google has of all the tower ids. So it might just be that they have not yet added NL yet or perhaps just your particular carrier (I would be intrested to see what results NL users with different carriers get).
Tower ?
Let me ask a quick question. The location indicated. Is that the actual location of the tower or and approximation of your position ????
angelome said:
Let me ask a quick question. The location indicated. Is that the actual location of the tower or and approximation of your position ????
Click to expand...
Click to collapse
its not the tower location. I work ~2 miles from home and at work it said i was within 1400 meters of the location. Which was pretty close, when I was at home it gave the same location (well about 1 block difference from the one at work) but said I was within 5000 meters of said location. Pretty neat program update. Its not the tower location because I looked at satelite view and there isn't any tower anywhere close to the blue dot
Very nice! Works ok on weak GSM signal near Swindon (UK) on T-Mobile. At home it shows within 1 ml of actual location. Now - will they enable some interaction with Google Map so you can send a web page link to someone that will show where you are on Google Map . Lots of potential with this one.
illavbill said:
its not the tower location. I work ~2 miles from home and at work it said i was within 1400 meters of the location. Which was pretty close, when I was at home it gave the same location (well about 1 block difference from the one at work) but said I was within 5000 meters of said location. Pretty neat program update. Its not the tower location because I looked at satelite view and there isn't any tower anywhere close to the blue dot
Click to expand...
Click to collapse
I believe there is some extrapolation based on signal strength but the tower is the key identifier (from an article about it)
"Cellular networks work in this way that neighbouring base stations form "cells" in which users can make phone calls. Interestingly each base station sends unique "cell identification" (cell ID) so if you know where physically each base station is located you can extrapolate physical location of a phone! Apparently Google has database of cell IDs and Google Maps application sends to Google list of neighboring base stations and in return Google servers are returning approximate geographical location of your phone! "
GPS-A
This is probably based on the GPS-A(assist) technology that 911 uses. I would guess that it uses signal strength(distance), and multiple towers(direction) to make its guess. Its pretty neat really. just installed it tonight. I had given up on google maps in favor of live search, but I think I may have just changed my mind. trying to figure out where you are, to tell it to find you kind of sucked when you were wwalking around a new town that you had never been before. This one is definatly a keeper.
Tried last night. My locationw as temporarily unavailable. I switched to 2G only and voila, it found me (well, sort of)
On Orange UK.
Tried it on mine, and got my location within 1400 meters. Its not bad, very useful if you wake up hungover in a doorway somewhere.....
Works in NJ
I had also given up on Google Maps in favor of MS Live but I may have just changed my mind. I loaded this last night, drove for about 40 minutes on highways in northern NJ, and it was reasonably accurate. It showed my location on the highway for the most part which makes me believe the location indicated is not the tower location. Now, the location on the map leads or lags wherever I might actually be but that is OK. I was in Central and Northwest NJ in the "boonies", way out in the hills.
All in all, pretty impressive. I am sticking with it and hope that there will be continual improvements.

How to Run GPS independent of T-Mobile Network's Data Services

Today, I took my wife to work and took my TP2 and turned on GPS with Google Maps knowing full well that once I got her to her job, I would have no T-Mobile service. The moment I lost the signal, GPS continue to plot me correctly up to the point it needed updating my maps and I got "Network Unavailable". I have an 8GB microSD card installed. My question to all is can GPS run independent of the network and if not, is there a 3rd party software that will run on the Windows Mobile OS? I like to know if I lose service I still have GPS. I can't imagine what dumbass came up with the idea to tether data services to GPS knowing there will be situations where service might not be available, for example severe weather knocks out a tower. Wasn't the idea into GPS to be independent. I get needing data services if I don't have a memory card; I don't get the logic that says, the moment I lose my cellular provider's service I'm SOL; thanks!
This is an unfortunate limitation to Google Maps. Although there is a workaround of sorts. If you cache the map data by doing all the stuff while you are in a good service area, when you are there it won't need to download all the stuff. This is a pain I agree, but it works.
yes, that is a GoogleMaps feature, but it has nothing to do with GPS - it has to download maps as it goes. if you install other software with built-in maps, e.g., tomtom, you will be free from your networks.
gehzumteufel said:
This is an unfortunate limitation to Google Maps. Although there is a workaround of sorts. If you cache the map data by doing all the stuff while you are in a good service area, when you are there it won't need to download all the stuff. This is a pain I agree, but it works.
Click to expand...
Click to collapse
Yes, works nice, used this 'workaround' for my past holidays. The only drawback is that Google Maps does cache the maps in the device memory and not on the memory-card, thus filling up the device memory pretty fast
Anybody knowing how to change this behaviour?
MeCry
Ahh I was unaware of that. I assume then that it would be solved by installing Google Maps to your SD card instead of device memory.
SnittyKitty said:
Today, I took my wife to work and took my TP2 and turned on GPS with Google Maps knowing full well that once I got her to her job, I would have no T-Mobile service. The moment I lost the signal, GPS continue to plot me correctly up to the point it needed updating my maps and I got "Network Unavailable". I have an 8GB microSD card installed. My question to all is can GPS run independent of the network and if not, is there a 3rd party software that will run on the Windows Mobile OS? I like to know if I lose service I still have GPS. I can't imagine what dumbass came up with the idea to tether data services to GPS knowing there will be situations where service might not be available, for example severe weather knocks out a tower. Wasn't the idea into GPS to be independent. I get needing data services if I don't have a memory card; I don't get the logic that says, the moment I lose my cellular provider's service I'm SOL; thanks!
Click to expand...
Click to collapse
A-GPS is dependent on the Carrier. No other solution to access GPS according to Wikipedia.
kable said:
A-GPS is dependent on the Carrier. No other solution to access GPS according to Wikipedia.
Click to expand...
Click to collapse
NO, you completely missed the point. There is a real GPS in the phone.. Fairly daft, but actual GPS chipset which gets data from satellites, not entirely dependent on cellular coverage.
But he's trying to navigate based on Google Maps, which requires constant data. The answer is to get something with maps.. iGO, TomTom, etc.. Earthcomber is another free one that'll do "Google Map-like" routing and it's free, but not sure it's worth it.
^agreed
you guys are using pretty strong language to describe something that's, imho, user error. a small problem with free information on the interwebs is that, unless you can articulate exactly what you're looking for, you may not find the answer... making you the perfect customer for the sales clerk selling you $70/month data plan.
GPS is different from aGPS(assisted). the TP2 has both. that is, it has the GPS chip that can receive the satellite signal, and it is aGPS capable in that it uses cell tower triangulation and other wifi IP info. in both cases, you'll need maps on your device so it can place the satellite coordinates for you to see. GoogleMaps does this by downloading maps a-la-carte.
like Mesquire said in post3, if you buy independent maps and install them on your SD card (TomTom,Garmin,IGO,etc), your phone can be in FlightMode and still receive the satellite signal with the GPS chip, and still plot the coordinates on YOUR map, without WIFI, without Data plan, without Cell signal. but you'd have to turn aGPS off so it doesn't interfere. Keyword here is to use Your Own map, and turn aGPS off.
i'm no expert in this, and the above is my humble interpretation, but i just wanted to say, take a deep breath, and see if it's not user error that's causing the frustration.
aGPS also includes atmospheric aberration correction data to make the GPS coordinates more accurate. People seem to leave this out and think it is just internet data. This is false.
gehzumteufel said:
aGPS also includes atmospheric aberration correction data to make the GPS coordinates more accurate. People seem to leave this out and think it is just internet data. This is false.
Click to expand...
Click to collapse
Best post of the day

GPS over GPRS without GPS comunicator for DASH

I have seen on samsung simple phone i don't remember model... however so it has google earth and it was working by internet and was shoing my place in about 10Mtrs corency... so can we or do we have some kind of program to make that on HTS EXCALIBUR?????? i have tried google earth for smartphones but anyways it's requesting GPS device...
It is possible to triangulate your location to a certain (horrible) accuracy using Cell Towers in your area. I believe there are actually programs that do it (I have used one). The best accuracy i have ever gotten was within 150 Meters, standing still. That is the second down-fall..you can't use triangulation efficiently when moving (if at all...)
So unfortunately, there is not real good way to do this. For decent results, you would want a GPS.
It is possible to triangulate your location to a certain (horrible) accuracy using Cell Towers in your area. I believe there are actually programs that do it (I have used one). The best accuracy i have ever gotten was within 150 Meters, standing still. That is the second down-fall..you can't use triangulation efficiently when moving (if at all...)
So unfortunately, there is not real good way to do this. For decent results, you would want a GPS.
Click to expand...
Click to collapse
I used Google Latitude which uses some sort of cell tower triangulations on my DASH and it works out pretty well. I was able to get within 80 meters and if you actually look at the Google map that is in the Latitude, my position is actually spot on.
My Google Maps Street View puts me within 50 meters.
Now is this using a DATA Connection? (I noticed the title said GPRS). That could make the difference. Whenever I tested out a program like that, i would be using little to no data connection, but if there is a greater stream of data being transferred, that may affect the response (or make it easier for the phone to identify the closest 3 towers)...
xXx
so what kn of settings I must give in GOOGLE LATITUDE that it shows me my place by GPRS? i pushing on MY LOCATION but program is saing that my location is unavalibe... I live in armenia can it be areason of error?
Virtual GPS
There is a program by Kamlex called Virtual GPS. There is a free version and a pro version. It uses no internet access and gets your location through the cell towers.
When using Google Maps, just set your gps com port to which ever port the VirtualGPS is using (usuallly 3) and it will locate you to the nearest tower. I will post the program here.

Google Maps 4.0 Unable to locate Satellites

I have downloaded the 4.0 update. Now I get a Weak GPS signal alert after it searches for roughly 10 minutes.
I have tried all Com0-9 ports, hard resets, and uninstalling/reinstalling Google Maps 4.0
I have the US Cellular HTC Touch Pro 2, WM 6.5 pro, running the standard ROM.
Is this a HTC hardware issue, Google Maps issue, or USCC tower issues??
I had no problem finding 8 - 10 satellites with the old version.
Using my Tilt2 with stock ROM, Google Maps 4.0 got a fix for me.
GPS is a piece of garbage for this phone, at least for me,
It just never worked again for me since the stock rom (always says seeking satellites 0)
Alos,
"My location" is always is in the same spot (I can be miles away and says i'm in the same place)
I haven't done any research on this two issues, maybe some has my problems too?
Well maybe you should try this.
After I flash a new rom to get gps to work I have to do this.
Run "htcGPStool"
Leave phone outside for about 3-5mins until it gets a lock. After that my gps locks in 30seconds or less
ps, the baud rate for the tilt 2 is 57600- com 4
try the link in my signature for the aGPS cab.
This enables aGPS and changes the servers from the public ones which are configured on HTC (and many other devices) by default to the nokia ones which are maintained better and lead to a faster lock.
After installing the cab, run and update/download QuickGPS and make sure you have a data connection enabled then either try google again or htcGPStool or any other gps utility and see how fast you get a lock then
initial lock might take up to a minute, but locks after that come almost instantly.
fone_fanatic said:
make sure you have a data connection enabled
Click to expand...
Click to collapse
Why does one need a data connection for GPS? OK, for Google Maps, yes, but just getting a fix doesn't require one -- or does your CAB do something that /does/ require a data connection?
A while ago I read people enabling bluetooth to get GPS working. Yesterday I disabled the cellular phone and it looked like GPS was locking after this. Not a fix if you ask me anyways...
pistou said:
Why does one need a data connection for GPS? OK, for Google Maps, yes, but just getting a fix doesn't require one -- or does your CAB do something that /does/ require a data connection?
Click to expand...
Click to collapse
you need a data connection for aGPS. GPS itself does not need one, but the a in aGPS stands for assisted where it uses your data connection to connect to a server to locate you more precisely.
(My understanding of this is that basically your device sends info to the server about which cell site towers are near you, the server uses this info to tell your device which satellites are best for your location, so your device isn't just looking for every sat. its looking for specific ones.)
Here's the wiki for aGPS
http://en.wikipedia.org/wiki/Assisted_GPS
Theres also a bunch of websites with more info regarding aGPS but its best to have your data connection enabled if you want to use aGPS.
gotwake424 said:
Well maybe you should try this.
After I flash a new rom to get gps to work I have to do this.
Run "htcGPStool"
Leave phone outside for about 3-5mins until it gets a lock. After that my gps locks in 30seconds or less
ps, the baud rate for the tilt 2 is 57600- com 4
Click to expand...
Click to collapse
Is "htcGPStool" QuickGPS on the programs list?? If not, explain thank you. As for the baud rate, etc... are you talking about the GPS hardware port? My settings say (none) and Baud rate: 4800???? This I have never messed with, could this be the problem??
ATT Tilt 2 w/ stock ROM...Loaded google 4.0 today with no connectivity issues. I normally able to locked my GPS signal in seconds.....
dataylor said:
Is "htcGPStool" QuickGPS on the programs list?? If not, explain thank you.
Click to expand...
Click to collapse
No, "HTC gps tool" is not the same as QuickGPS and it doesn't do the same thing.
AFAIK, QuickGPS talks to a server and gets info on where/what satellites should be visible for your location, your location determined from triangulation (or some kind of location) of nearby cell towers.
HTCGPStool uses the GPS functionality of your phone in some way that helps subsequent lock on satellites. Honestly, I don't know exactly what/how it does -- but it's not the same as Quick GPS.
MCbrian said:
No, "HTC gps tool" is not the same as QuickGPS and it doesn't do the same thing.
Click to expand...
Click to collapse
Ok, where is htcGPStool??? Looked through the settings and have not found anything that directs me to HTC gps tool.
I have an "external GPS" icon that directs me to GPS settings allowing me to change GPS program ports, and the GPS hardware ports.
Brodie619 said:
ATT Tilt 2 w/ stock ROM...Loaded google 4.0 today with no connectivity issues. I normally able to locked my GPS signal in seconds.....
Click to expand...
Click to collapse
awesome, It locates me just find just doesn't find any satellites. Then I get Weak GPS signal screen.
MCbrian said:
No, "HTC gps tool" is not the same as QuickGPS and it doesn't do the same thing.
AFAIK, QuickGPS talks to a server and gets info on where/what satellites should be visible for your location, your location determined from triangulation (or some kind of location) of nearby cell towers.
HTCGPStool uses the GPS functionality of your phone in some way that helps subsequent lock on satellites. Honestly, I don't know exactly what/how it does -- but it's not the same as Quick GPS.
Click to expand...
Click to collapse
QuickGPS downloads the ephemeris data so that it can predict where the satelites are, which ones are visible, and which ones to use. From that data it is able to get a fix faster. There is no fix derived from ephemeris data, and any GPS will work without it. The GPS device in that case must basically just scan channels and listen for enough data to get a fix.
That all said; no problems here with Google Maps.. If I'm inside I'll often get a location approximation based on cell ID's and whatever goes on behind that location calculation and depending upon how the building is constructed I may or may not get a GPS signal eventually. For example my house, no problem, I might see the approximate location for 10s then the real GPS location. At work with heavy beamed roofs and several layers of metal between me and the sky I'll never get a signal inside except beside a window. If I'm outside, I nearly immediately get a GPS fix.
http://www.how-gps-works.com/glossary/ephemeris-data.shtml
As far as I know HTC GPS Tool does nothing except allow you to basically reset the GPS, ie: perform a warm or cold restart on it. Perhaps this will help, vs rebooting the phone, if GPS is not behaving. I very rarely will find the GPS is simply not functioning after a reboot.
This tool also might let you change the COM and BAUD but you would not likely need to do that on a phone with a built-in GPS. Even if you were using an external bluetooth GPS I'm not sure you'd want to change the COM/BAUD here, you'd simply use the COM port you set up with that bluetooth device.
That all said, the only time I don't get an immediate GPS fix in Google Maps is if I'm indoors. If I'm in a light structure, like my house, I'll get a cellular approximation for 10-20s. If I'm at work with many beams and much metal above me I'll never get a fix inside.
Let me try to be more specific.
1. When utilizing the app, it locates me within 3100 meters. (pressing the blue button, lower right hand corner)
2. After about 10 minutes of the upper right hand corner stating "seeking GPS satellites (0)" the screen gives me a Weak GPS signal message.
3. I have tried changing com 0-9 ports, with no luck.
4. GPS is enabled
5. I have hard reset the device and reloaded all my working apps.
6. I have uninstalled/reinstalled Google Maps 4.0
7. I have tried different locations throughout Northeast, WISCONSIN.
8. I have tried it while utilizing WIFI. No luck
9. I have tried the Bluetooth remedy. No luck
10. Waiting on replies from HTC, USCC, and GOOGLE.
11. XDA so far is the only place with anybody responding.
HTC Weather TAB
Just got done talking to a USCC tech rep.
He has stated that he is unable to give any technical help with the Google Map app. (no kidding sherlock) He was not even of any help when it comes to the GPS settings, but he did state I am the second person that he has talked to with the same problem.
Now to see how quickly HTC, or Google responds.
The only worry I have is not knowing if it is a hardware issue that should be corrected by HTC. I noticed the HTC WEATHER tab works fine. is this using the same GPS settings as the Google Map app??
also, I have been holding out on the aGPS cab posted earlier. If, and when, I use this fix I will post the results.
dataylor said:
Ok, where is htcGPStool??? Looked through the settings and have not found anything that directs me to HTC gps tool.
Click to expand...
Click to collapse
HTC GPS Tool is not a standard app. Some cooks include it in their custom roms. I don't have a link for it handy, but if you search on the forum boards for "HTC GPS Tool" you'll find it.
That said, I don't know how important it is anyway...
ok, talked to an HTC tech. We checked the settings and these where adjusted. Still nothing. Got rid of Google Maps and tryd BING, and still nothing. HTC TF3D Weather tab seemed to update just fine, this gave the tech a reason to dump me on MSN and Google. Do you really think BING and GOOGLE share some programming similiarities????
Did you run Quick gps? That did it for me when I first got my phone.
It is installed under the programs lists.
dataylor said:
ok, talked to an HTC tech. We checked the settings and these where adjusted. Still nothing. Got rid of Google Maps and tryd BING, and still nothing. HTC TF3D Weather tab seemed to update just fine, this gave the tech a reason to dump me on MSN and Google. Do you really think BING and GOOGLE share some programming similiarities????
Click to expand...
Click to collapse
I think they both access GPS via WM. Maybe HTC Sense (Weather tab) directly access the GPS?

Location wrong without WiFi/GPS/Edge

Hey guys,
I tried searching on google but to no solution.
The problem is when I switch off all forms of data except cellular coverage, my location changes to a City where I'm not at. I went to that place maybe thrice since I got the phone.
My location in Maps, Weather or even location saved along when I take pictures will be that other/wrong location.
Its easily fixable by just starting one of the data services, but why should I even face it in the first place.
Its happened on all ROMs and wipes don't fix it. Done a full wipe twice from cwm.
My GPS works normally when I'm using maps, it takes about 30 seconds to get a lock on my location.
Any workaround or solution or fix? (except for not keeping data switched on all the time)
Thank You.
Cheers.
death__machine said:
Hey guys,
I tried searching on google but to no solution.
The problem is when I switch off all forms of data except cellular coverage, my location changes to a City where I'm not at. I went to that place maybe thrice since I got the phone.
My location in Maps, Weather or even location saved along when I take pictures will be that other/wrong location.
Its easily fixable by just starting one of the data services, but why should I even face it in the first place.
Its happened on all ROMs and wipes don't fix it. Done a full wipe twice from cwm.
My GPS works normally when I'm using maps, it takes about 30 seconds to get a lock on my location.
Any workaround or solution or fix? (except for not keeping data switched on all the time)
Thank You.
Cheers.
Click to expand...
Click to collapse
Location without GPS is online service. I hope that answers your question about "fixing" it.
Sent from my HTC One X using xda premium
There's three things at play in plotting location: 1) GPS, 2), aGPS, and 3) Geo-location
GPS is the onboard chip functioning alone to pick up satellite signals and lock on them. You can test how well your GPS chip alone works by putting the phone in airplane mode and rebooting it.
All aGPS does is use a wireless signal (Wi-FI or cellular) to help the chip get its first lock faster. Once lock is established the chip is on its own.
From Wiki...
"Assisted GPS is a system which can, under certain conditions, improve the startup performance, or time-to-first-fix (TTFF) of a GPS satellite-based positioning system. It is used extensively with GPS-capable cellular phones as its development was accelerated by the U.S. FCC's 911 mandate making the location of a cell phone available to emergency call dispatchers."
Geo-location uses wireless signals alone to approximate position. Devices w/o a GPS rely on this for location based services.
From Wiki...
"Geolocation is the identification of the real-world geographic location of an object, such as a radar, mobile phone or an Internet-connected computer terminal. Geolocation may refer to the practice of assessing the location, or to the actual assessed location."
Once the chip locks, it memorizes the position of the satellites. So if you had your wireless on to get first lock and then turned it off the chip is still using the satellite locations aGPS helped it find. If you want to test the performance of your chip itself reboot it in airplane mode. Download GPS Test from Play. It'll give you a much better picture of what's happening with your phone. I just tried it on mine and indoors it locked and got down to 15’ accuracy in less than a minute. Conditions affect performance but, at least outdoors, yours should do as well or better than mine. If it doesn’t, it’s a h/w problem.
tkolev said:
Location without GPS is online service. I hope that answers your question about "fixing" it.
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
BarryH_GEG said:
There's three things at play in plotting location: 1) GPS, 2), aGPS, and 3) Geo-location
GPS is the onboard chip functioning alone to pick up satellite signals and lock on them. You can test how well your GPS chip alone works by putting the phone in airplane mode and rebooting it.
All aGPS does is use a wireless signal (Wi-FI or cellular) to help the chip get its first lock faster. Once lock is established the chip is on its own.
From Wiki...
"Assisted GPS is a system which can, under certain conditions, improve the startup performance, or time-to-first-fix (TTFF) of a GPS satellite-based positioning system. It is used extensively with GPS-capable cellular phones as its development was accelerated by the U.S. FCC's 911 mandate making the location of a cell phone available to emergency call dispatchers."
Geo-location uses wireless signals alone to approximate position. Devices w/o a GPS rely on this for location based services.
From Wiki...
"Geolocation is the identification of the real-world geographic location of an object, such as a radar, mobile phone or an Internet-connected computer terminal. Geolocation may refer to the practice of assessing the location, or to the actual assessed location."
Once the chip locks, it memorizes the position of the satellites. So if you had your wireless on to get first lock and then turned it off the chip is still using the satellite locations aGPS helped it find. If you want to test the performance of your chip itself reboot it in airplane mode. Download GPS Test from Play. It'll give you a much better picture of what's happening with your phone. I just tried it on mine and indoors it locked and got down to 15’ accuracy in less than a minute. Conditions affect performance but, at least outdoors, yours should do as well or better than mine. If it doesn’t, it’s a h/w problem.
Click to expand...
Click to collapse
Thanks, that was a very informative post.
Well I switched on GPS and put my phone in airplane mode and restarted. The Maps App keeps saying "Your current location is temporarily unavailable" and I can't figure how to use the GPS Test yet.
Okay, I did get a lock-on from the Maps and the GPS Test app. I went closer to my window lol . Now I'll see if my location comes up wrong.
Edit:Location came up accurate in weather.
Edit2:Location is accurate in a photo I clicked with everything off.
By accurate I hope you understand what I mean, when all the data goes off the phone should still think its in the place/location where it was when the data was on. Ii.e Surat in my case. But what used to happened before today(gps in airplane) was without data the phone will think its in Pune, which is a 12 hours drive from here.
I'm not the only one who's faced this, some say its a bug in sense :/
Anyways here's a thread I saw earlier
http://www.htconesource.com/forum/htc-one-x-discussion/1042-incorrect-location.html
The answers the guy gets are retarded.
To be sure, are you saying that when only on mobile data and relying upon that, you cannot get an accurate location down to 1 KM?
If so, this sounds like a software issue or a carrier issue.
If your GPS has poor reception then I would advise getting warranty repair. It might have the same issue as the Wifi antennas do.
Yeah just so you know pure GPS is line of sight, you have to have a clear view of the sky to work (no clouds either).
Sent from my HTC One X using xda app-developers app
Hunt3r.j2 said:
To be sure, are you saying that when only on mobile data and relying upon that, you cannot get an accurate location down to 1 KM?
If so, this sounds like a software issue or a carrier issue.
If your GPS has poor reception then I would advise getting warranty repair. It might have the same issue as the Wifi antennas do.
Click to expand...
Click to collapse
jonshipman said:
Yeah just so you know pure GPS is line of sight, you have to have a clear view of the sky to work (no clouds either).
Sent from my HTC One X using xda app-developers app
Click to expand...
Click to collapse
No no.
My location when all services are on shows up fine. But say I have a weather widget and all my data services are off, instead of showing the location detected last when data services was on the widget and other settings will show another city.
I'll explain it with an example.
Lets have a hypothetical country with all the letters as its cities.
I stay in 'S' at present. I have visited 'P' and 'M' a couple of times but I'm back to 'S' now. On the occasion that my data services switch off, intentionally or because of weak coverage. Instead of showing 'S' as my location in the weather widget, app and geotag the phone will show 'P' which I had visited days ago.

Categories

Resources