Database Users

GPS accuracy

I've got problems with the GPS on my Polaris and I'm wondering if anyone else has the same issue: the accuracy is abt 5-15m off and it updates less than 1frame/sec regardless of the gps software I use (tomtom, google maps or garmin xt) My Radio version is 1.64.08.21 Murata and the rom pdaviet v16
Can anyone point me towards a solution for this please? Thanks!

To my knowledge gps is off target for a reason. All comercial versions are innacurate either in time or position so you cannot use it for war or something like it. If the 5 to 15 meter difference is to much I do not know.

pereirald said:
To my knowledge gps is off target for a reason. All comercial versions are innacurate either in time or position so you cannot use it for war or something like it. If the 5 to 15 meter difference is to much I do not know.
Click to expand...
Click to collapse
Thanks for your answer pereirald, I knew that commercial GPSs are off so they can't be used for military purposes but the GPS on my Polaris is annoyingly slow. If I compare Garmin mobile XT runnin on my polaris with a friend's Garmin nuvi 760, his is smoother, updates faster and slightly more accurate...so any1 knows whats going on here? Is it only me with this issue or it happens on all HTC phones with Qualcomm chips?

I am on the latest udK rom using radio 1.64.08.21
I can GPS sync inside buildings
Syncs VERY fast
I also find it very accurate and def not 15meters off

Actually I also use Garmin XT and most of the time I can even pinpoint me using "Where am I?" but sometimes it does not give the right door but the neighbours. So I guess there is an up to 5 meter innacuracy. Being slower one should expect: The the chip isnot dedicated is it? It does other stuff while we are trying to use GPS. So you could try to things:
1) Minimal services running and disconnect phone (Airplane mode)
2) I don't know but that is a possibility that you will get different results with different rom. (I think I do, altough I haven't measured it).
Hope it helps

atl4ntys said:
I've got problems with the GPS on my Polaris and I'm wondering if anyone else has the same issue: the accuracy is abt 5-15m off and it updates less than 1frame/sec regardless of the gps software I use (tomtom, google maps or garmin xt) My Radio version is 1.64.08.21 Murata and the rom pdaviet v16
Can anyone point me towards a solution for this please? Thanks!
Click to expand...
Click to collapse
The accuracy depends on the number of satelites as well.
I noticed that the GPS chip of the TC is more nervous then a SirfIII chip like the one I had in my MIO A201.
But both the MIO A201 and the TC didn't show a better accuracy then around 10M.

Thanks for your replies guys, I did some testing over the last 2 days and after taking a trip in the middle of the country with the GPS on, I was surprised to see that it fixed itself At home is not showing me 5 doors down the road and in someone's garden anymore and when I walk/run with it, it pinpoints my location within 5m. The smoothness is still not there even if I turn off the music player and any other progs that I had running in the background, but I know thats because of the lack of proper graphic drivers
So in conclusion the accuracy is down to these 3 things:
1.radio flash not os-rom update.
2.number of satellites it connects to.
3.apparently driving around a bit
Cheers!

In case you use google earth, its the program which doesnt update quickly enough. The receiver does...
The receiver has a very irritating 'feature' built in which is very annoying when trying to use your GPS unit while walking: to make car navigation less jerky and stop you from jumping from road to road, the receiver doesnt update the position anymore after you came to a stop (or move slowly, eg: by foot ). It updates again after you covered several meters of ground and keep moving. This might be useful in your car where you can move fast and steadily, it's very very annoying if you try to find something by foot. The 'feature' is hardware-based, by now no one managed to turn it off.
Edit: uuhm... yes, of course the Radio. The Operating System part of the ROM only houses programs and such, the hardware-near stuff like phone functions, bluetooth and wifi and most important the GPS stuff gets updates through the Radio-ROM. I figured this is a widely known fact...

Touch HD same GPS lag as Touch Pro?

Just wondering if the Touch HD will get the same laging GPS receiver the Touch Pro and Diamond got? I sure hope not. Its the only thing that dissapoints me with my Touch Pro.

utvol06 said:
Just wondering if the Touch HD will get the same laging GPS receiver the Touch Pro and Diamond got? I sure hope not. Its the only thing that dissapoints me with my Touch Pro.
Click to expand...
Click to collapse
It's not an issue of hardware, but software. That's like asking if it will have the same laggy TouchFlo3D because of its processor... It's just the software. My Fuze didn't have any of the complaints of slow TF3D or GPS lag, but it had the same GPS receiver as the European Touch Pro.

Black93300ZX said:
It's not an issue of hardware, but software. That's like asking if it will have the same laggy TouchFlo3D because of its processor... It's just the software. My Fuze didn't have any of the complaints of slow TF3D or GPS lag, but it had the same GPS receiver as the European Touch Pro.
Click to expand...
Click to collapse
I think the cause is the hardware, because some people tried with an external gps antenna, sirf3, and no lag at all. And changing software doesn't eliminate the lag. I use iGo and TT and the lag is always there...

onesolo said:
I think the cause is the hardware, because some people tried with an external gps antenna, sirf3, and no lag at all. And changing software doesn't eliminate the lag. I use iGo and TT and the lag is always there...
Click to expand...
Click to collapse
Hopefully HTC will be able to fix the GPS Lag in the diamond and Pro with a rom update...they are supposed to be working on it. I just hope the Touch HD wont share the same lag problem and that HTC sees that it doesn't before release.

Isn't the difference between the built-in GPS and an external GPS antenna the method? The built-in GPS is (AGPS) and an GPS antenna uses "normal" GPS....

No, that's not it.
Assisted GPS is something extra for a normal GPS system, not a different system. A basic GPS system will have to download the satellites' position each time it cold-starts, and that will take time. An A-GPS system will have an additional way to download the current position of all GPS satellites, in order to speed up the process, by knowing the position of your phone in a GSM network or by downloading an updated file containing the satellites' current position, through a data network (wifi or 3g). That's why the "gps assistance" files you download through this kind of assistance application (in HTC's case, it's called "Quick GPS") are only valid for 2-3 days: in 2-3 days, they expire and the satellites' positions aren't valid anymore.
All GPS systems must have an antenna of some kind, either internal or external. Mostly all PDAs with integrated GPS have an internal antenna, which does the job in most conditions, but it's not perfect. I used an external antenna for car navigation, and in most situations I went from 4-5 detected satellites (with so-so signal) to 7-8 with full signal, only by having an antenna on the roof of my car. However, this shouldn't influence by all means the GPS lag, only the precision of GPS positioning on the map (coordinates).

That's not it either.
Quick GPS downloads a file prior to GPS initiation. When started the GPS works off-line.
A-GPS is a hybrid technology that auguments the GSM satellite signal with GSM signal on-line.
You can use Quick GPS without A-GPS, which is the case of most users today, for compatibility reasons.
As for the previous question regarding GPS lag, here are two points (depending on what you understand by GPS lag):
1. the GPS chipset has a built-in refresh rate, which should be something like 0.5 seconds. This is the same for all devices sharing the same chipset.
2. when saying that the GPS performance depends on software, it does not mean IGO or TomTom, it means the Radio drivers. Newer Radio versions come up from time to time and may improve GSM / GPS signal strength or battery life, and in the very best cases both.
Follow the ROM Development threads for more info.

dani31 said:
That's not it either.
A-GPS is a hybrid technology that auguments the GSM satellite signal with GSM signal on-line.
You can use Quick GPS without A-GPS, which is the case of most users today, for compatibility reasons.
Click to expand...
Click to collapse
Not to be a GPS-nazi but A-GPS doesn't necessarily imply the usage of a GSM network, but the usage of an assistance server. From Assisted GPS page on Wikipedia:
A typical A-GPS-enabled cell phone will use an internet connection to contact the assistance server. Alternatively, it may use standard non-assisted GPS, which is slower and less accurate, but does not lead to network charges for data traffic, which can be considerable.
Click to expand...
Click to collapse
So, it can be done either through GSM networks, or through a data connection; therefore, the Quick GPS app is simply another form of A-GPS.
dani31 said:
1. the GPS chipset has a built-in refresh rate, which should be something like 0.5 seconds. This is the same for all devices sharing the same chipset.
Click to expand...
Click to collapse
That I don't think would be visible to the end user. According to the NMEA/SiRF specs, the min refresh rate would be 1 Hz (one time per second), but the average among devices seems to be around 5 times a second, once every 200 miliseconds (5 Hz refresh). The GPS chip should do that without a problem (according to the manufacturer's specs), therefore the problem must be somewhere after the GPS data is sent to the device; either in communication to the CPU, either in the navi software. My 2 cents. We'll see.

Review from SlashGear
HTC Touch HD's review by SlashGear talks about the GPS lag..
this is the part about GPS performance of the Device:
"The HTC Touch Diamond has been criticised for its GPS performance, which can lag behind actual position when moving at speed. Hopes were high for the Touch HD to avoid such a fate, but unfortunately that doesn’t appear to be the case. Whether from the processor (the same 528MHz Qualcomm MSM7201A as in the Diamond) or the GPS receiver itself, when driving the indicated position is always 50-80ft behind. This makes navigating via the on-screen directions incredibly difficult. At lower speeds, such as when walking, the Touch HD has no problems, just like the Diamond. We’re still attempting to get hold of some alternative GPS programs, such as TomTom or Garmin Mobile XT, and will update this review when we’ve had an opportunity to try them out."
has anyone else bought the Touch HD yet who can confirm this?
i just hope the GPS lag isn't as bad as the HTC Touch Diamond/Touch Pro as i'm going to order one pretty soon.

For the sake of millions of readers and potential touch HD buyers like me,can someone who already own a touch HD,please be kind enough,do an experiment about this gps lag issue and give an absolute answer to this issue.Gps lag is very noticeble when you are navigating at high speed(eg:80-100km/h) or when doing multiple rapid turns(eg:driving on back alleys).at low speed(slow drive or walking),no lag is apparent.Currently i'm using ipaq 612c where it has this lag issue and its most noticeble when using Garmin XT.When using mapking or tom tom it is not that bad..Really waiting for all your answers.
Thanks in advance for all your help

iznee said:
For the sake of millions of readers and potential touch HD buyers like me,can someone who already own a touch HD,please be kind enough,do an experiment about this gps lag issue and give an absolute answer to this issue.Gps lag is very noticeble when you are navigating at high speed(eg:80-100km/h) or when doing multiple rapid turns(eg:driving on back alleys).at low speed(slow drive or walking),no lag is apparent.Currently i'm using ipaq 612c where it has this lag issue and its most noticeble when using Garmin XT.When using mapking or tom tom it is not that bad..Really waiting for all your answers.
Thanks in advance for all your help
Click to expand...
Click to collapse
Ok, I have performed an experiment. Hopefully it will help you and "millions" of readers to decide if GPS lag is a problem or not on this device.
Test setup:
PDA 1: Mitac Mio A701, GPS chip: SIRF III, navigation software: IGO8
PDA 2: HTC Touch HD, GPS chip: Qualcomm, navigation software: IGO8
Experiment:
I start IGO8 on both devices and select the same destination. They both pick up GPS signal and the show starts..
Result:
PDA 1: depending on your speed, there is a GPS lag. This is between 0-2 seconds. In distance I would say about 20 to 50 meters. Again, all depending on your speed. When you stop (which unfortunatelly happens a lot in the netherlands due to high traffic ) the GPS gives the right position.
PDA 2: see PDA 1. There is practically no difference. Sometimes PDA 1 is more ahead, sometimes PDA 2 wins. The voice commands start virtually at the same time "take a turn left", "leave the highway" and so on. Maybe PDA 2 is a bit faster (less GPS lag) since I heard the voice like a 10th of a second earlier than on PDA 1.
Conclusion:
GPS lag is a problem that practically all "cheap" GPS devices have, specially in a moving vehicle. Since your GPS data is refreshed every second, you would be one second off every time. Moving at 100km/h, that means an offset of 27 meters. Moving at 150km/h that is about 41 meters (and yes, I know I should not drive that fast in the netherlands ). Add to that the GPS errors and you will get an impression on how hard it can be to predict where you will be in a second.
You could then say that the navigational software should take that into account and predict where it would be, but that also has a negative side. Have you noticed what happens when you do not follow the course laid ahead by the navigational software? it stays on course for a couple of seconds and then it notices you actually turned left or right, thus the direction should change.
The more aggresive the prediction is, the more you will have a problem when deviating. The less prediction, the more GPS lag you will have.
Is this a problem while driving? I have never considered it a problem. On the highway you do not decide to take a turn within 50 meters (I hope ). In the city, you should have way less problems with GPS lag...
Last, for all the "millions" of readers, please read these two articles:
Article 1, an abstract about navigational state estimator
Article 2, a forum discussing this very problem in the i-Blue receiver. Pay special attention to the answers given by JakeRich
I hope this helps you all out...

David,
I am so very pleased you had these two devices with the software mentioned.
It just so happens that I too have a Mio A701 with iGo and my next purchase will be the Touch HD.
Your test served as a good starting block for me to build upon.
I did wonder how well the Touch HD would fare against my A701.
Many thanks.
Beards

Thanks for your test. What about TMC info with iGo8 ?

gergy said:
Thanks for your test. What about TMC info with iGo8 ?
Click to expand...
Click to collapse
The device finds the TMC receiver (using 8.0.x version, 8.3.x version does not find anything) but then it does not find a channel. This would need a TMC expert to work out...maybe you need to change something in the sys.txt file of IGO8

Something I would add is that until last week I was using a SirfStarIII equipped BT GPS receiver linked to my Hermes and running TTN 6.03, now I'm using the Touch HD internal GPS and TTN 7.45. I have found that the GPS signal appears to be significantly weaker on the Touch TD. However, it does have the capability to pick up more satellites it seems.
In my standard journey between home and work the BT GPS receiver never picked up more than 8 satellites but never picked up less than 4 and spent most time tracking 5-6. The Touch HD at times picks up 10, maybe even 11(!), satellites but often drops to 2 and spends most time tracking 3-5.

Impression
I'm using Tomtom 7,451 now on my HD.
I tried it with the internal GPs and even with an external bleutoth GPS receiver from Tomtom itself.
The so called lag is the same in both cases.It is caused by the slow refreshing rate ( almost 1 second ).That is not a major problem and is the same that I experienced already with the Polaris,Cruise and Diamond.
So when driving try to think at least 1 second ahead.
When you're not moving I got a pefect lock on my position with Tomtom but with Googlemaps i'm of by almost 150 meter to the East.
So that's software I think.

BerreZ said:
I'm using Tomtom 7,451 now on my HD.
I tried it with the internal GPs and even with an external bleutoth GPS receiver from Tomtom itself.
The so called lag is the same in both cases.It is caused by the slow refreshing rate ( almost 1 second ).That is not a major problem and is the same that I experienced already with the Polaris,Cruise and Diamond.
So when driving try to think at least 1 second ahead.
When you're not moving I got a pefect lock on my position with Tomtom but with Googlemaps i'm of by almost 150 meter to the East.
So that's software I think.
Click to expand...
Click to collapse
I get my touch hd today. looks like I wont be installing Google maps at all on it. I'm going to buy Co-Pilot 7 when I get the chance. I also like Windows Live search GPS app, but it may lag like google.

utvol06 said:
I get my touch hd today. looks like I wont be installing Google maps at all on it. I'm going to buy Co-Pilot 7 when I get the chance. I also like Windows Live search GPS app, but it may lag like google.
Click to expand...
Click to collapse
Google maps is already preinstalled, at least on my Touch HD it was (Netherlands)

last word on gpslag?
Hi to All,
Personally, i start realizing the limitation of forums in producing real information.
First of all, most "commercial" and consumer GPS update their position every second, as correctly pointed out in this forum. Said this, faster position updates are possible for professional devices, see
http://www.dsprelated.com/showmessage/22833/1.php
but we can probably forget about it for the time being.
so, don't be surprised if - driving at 100 km per hour alias 30 m/s - you will miss the exit by 30 meters. Be reassured: Felipe Massa will miss the box by 100m if he would drive by looking to the GPS - and your braking distance was anyway 60 m....aaaghh....i hope i will never meet any of you while making the test.
My firm and conclusive opinion after extensive evaluation with Igo and Tomtom and gwatch:
The GPS LAG on the touch HD is a metropolitan legend invented by i-members!
If you check on igo8, there is a small dot representing the actual position, and the arrow or the car is the position compute by software interpolation/filtering etc. Everybody can notice that the dot moves instantaneously. It is a matter of software to decide how to filter this data, and how "reactive" you want the position change to happen. On top of this, it is obvious that updating a VGA or WVGA screen will be heavier than updating a small screen, so there should be a lag which is dependent on the navigation software you use and on the load on your telephone.
However, there is definitely no lag on tomtom....the problem is: how to buy version 7?

Here is video comparison omnia vs hd
It seems to me there is little lag on hd.
Colud somebody translate it?
http://www.youtube.com/watch?v=v45--rkRgjk

TomTom 7 is always about 200 meters behind my actual position

Hi there,
i am running tt7 on my Asus P535 with WM 6.
I have this problem:
TomTom is always about 200 meters behind my actual position. I think this is so because of an not well resolution. Only if I drive very slow (about 30 km/h) tomtom shows my position correct.
I tried all versions. Repack 3 qvga, qvga... 7.450,.. 7.541...but each version came up with the same result.
Is there a possibility to stop this annoying lag ? Or do I have to cope with it. Did anyone else notice this , also?
With TT 6 (6.032) this problem never appeared.

If you're using a bluetooth reciever it sounds like it hasn't got many channels. More channels better reception - more accurate.
If the phone has gps built in then check the position of the phone in the car. It needs a clear signal to work properly. under the windscreen is best, not on the seat beside you.
Otherwise it sounds like memory problem. Other apps using ram and limiting how much the gps program can use. though most of the time when I had that problem it just kept jumping all over the place.

You have to slow down, you're driving too fast
You can also try turning off points of interest and any info you don't need. Even street names can make it laggy.

uran235 said:
Hi there,
i am running tt7 on my Asus P535 with WM 6.
I have this problem:
TomTom is always about 200 meters behind my actual position. I think this is so because of an not well resolution. Only if I drive very slow (about 30 km/h) tomtom shows my position correct.
I tried all versions. Repack 3 qvga, qvga... 7.450,.. 7.541...but each version came up with the same result.
Is there a possibility to stop this annoying lag ? Or do I have to cope with it. Did anyone else notice this , also?
With TT 6 (6.032) this problem never appeared.
Click to expand...
Click to collapse
I don't think it's Tomtom's versions problem... it's the GPS signals likely
If you don't get a good signals or number of Sats yo will be far from your real position.
Consider if there are alot of obstacles which would cause or interfere with the signals:
- Tall buidlings, trees, objects
- under ground car park, buidling
- Metals (depends)
- Raining and not clear sky
- Other devices or in a high EM
- GPS chips got faulty
- Firmware or memory that store calculate functions got problem
- Not enough numbers of Sats
- ...

Hi again,
I don't think it is an GPS Problem.
I have an built-in- GPS- Receiver and I get between 6-11 Satellites.
Another user (he has the Diamond) had this problem, also. But he took the wrong tt7- Version. After using the right one everything was okay.
But it also might be the processor of my P535 ? Might that also be possible?
oh, I got about 18- 20 MB of RAM free

uran235 said:
Hi again,
I don't think it is an GPS Problem.
I have an built-in- GPS- Receiver and I get between 6-11 Satellites.
Another user (he has the Diamond) had this problem, also. But he took the wrong tt7- Version. After using the right one everything was okay.
But it also might be the processor of my P535 ? Might that also be possible?
oh, I got about 18- 20 MB of RAM free
Click to expand...
Click to collapse
Have you tried using iGo or other GPS apps and experienced similar lag ?

Even on my old Wizard TomTom7 runs without problems.
Have you tried it in another car, or outside your car? Maybe your front window has a special alloy to prevent sun emission. Know this problem of some of my friends, they have had this problem (Mostly on new VW,Audi,BMW i know this problem, maybe other cras have something similar).

Hello,
I tried many other GPS-Systems. Navigon, IGO, MIO,Garmin, tt 6. But this 100-200 m lag appears only with tt 7. And this was all in the same car.
I have no ideas anymore what this might cause this.
I know, my P 535 is not the latest one but it still has got a 520MHz Intel Xscale..
It is not the map, also. I tried 3 different tt 7 maps already..

uran235 said:
Hello,
I tried many other GPS-Systems. Navigon, IGO, MIO,Garmin, tt 6. But this 100-200 m lag appears only with tt 7. And this was all in the same car.
I have no ideas anymore what this might cause this.
I know, my P 535 is not the latest one but it still has got a 520MHz Intel Xscale..
It is not the map, also. I tried 3 different tt 7 maps already..
Click to expand...
Click to collapse
I dont think changing car will make any difference . I used tt7 on p535 without any problem at all. but i like igo or garmin more

Do you have other GPS software like CheckPoint 3.0 ? Because Checkpoint failed to run correctly with my TomTom7 and Cruise.

Hello
I have the same problem with my nex Tomtom V7. i've got a Samsung Omnia
First I try it in walk, and my position is not correct
I try many times in a car and my position is not as exact than Tomtom V6

Well, weirred.
Maybe it is the ROM then.
I am still using WM 6 [CE OS 5.2.1236 (Build 17741.0.2.1) and not "WM6.1_20748.1.4.0" ROM.
Another user just jold me that with his PPC (ASUS 636N) the same error occured.

uran235 said:
Well, weirred.
Maybe it is the ROM then.
I am still using WM 6 [CE OS 5.2.1236 (Build 17741.0.2.1) and not "WM6.1_20748.1.4.0" ROM.
Another user just jold me that with his PPC (ASUS 636N) the same error occured.
Click to expand...
Click to collapse
As was mentioned above by snachez, I believe it's the amount of poi's you have showing on the screen while driving. I had the same problem with about 20 poi's showing. When I turned it down to about 4 poi's, the problem went away, and now it's SMOOTH as silk.
Hope this helps!

Sorry to chip in here. Seems like you all here uses GPS. I just bought a new PDA. MWg Zinc II with built in GPS. As I am living in Singapore, I would like to know is it possible to obtain igo Singapore map for free? GPS maps are very expensive and I would like to know where can I download it and use it as a full version without paying.

Igo8 no GPS fix

Hi, am I the only, who has unfunctional Igo8? Nobody have problem? I try patches, tips, AGPS, quickGPS and nothing, it fixes satellites and after second unfixed and it still repeats... Same with Igo2006, Igo 8.0.0 and 8.3.x... Can somebody help me? I never had this problems befor on Cruise and Diamond.

What GPS settings in IGO do you use? (port and baud rate)

Port 4 and no matter what speed, GPS is connected, but it is fixed after few seconds and starts cycling between fixed and unfixed with 0.5 second period... ROM is 1.40.405.3, I didn't see here anybody else with this rom

i use TT 7.910 and works great!
also try to use gps tuner (off road navigation) to try to have a fix... a see if is a compatibility error with iGo or else

Alekss_UH said:
Port 4 and no matter what speed, GPS is connected, but it is fixed after few seconds and starts cycling between fixed and unfixed with 0.5 second period... ROM is 1.40.405.3, I didn't see here anybody else with this rom
Click to expand...
Click to collapse
Try this cab it'll improve your GPS (faster fix, more stable/reliable).

bubu said:
i use TT 7.910 and works great!
also try to use gps tuner (off road navigation) to try to have a fix... a see if is a compatibility error with iGo or else
Click to expand...
Click to collapse
hi, i've installaed also tt 7.910 but when i tourn tt navigation still back from some second after that the tt go ok..
you don't have any lag?

Hi!
I'm using the auto settings for the gps. Its on port 1.
Yes i have a lot of lag. On the highway i lost an exit. I was travelling at about 120kmh, and the gps had a lad of about 700 mtrs.
I already returned mine. waiting for a new batch to arrive. Hope it comes with a new rom.

...
hello,
with igo2008, version 8.0.0.41506, the lag is roughly of 1,5 seconds (120 kms/H). Port 4., Caud baud 9600. With TomTom, version 7.45, lag is 1 second (minor than with igo2008). Measured to same speed.
I,m from spain, Valencia, but this would not have to influence.
Any another opinion?

Best GPS setting I found so far
Guys, the best setting for GPS I found so far:
Go to registry, to path HKEY_LOCAL_MACHINE/Software/HTC/SUPL AGPS
Set GPSMode to 1
Set EnableAGPS to 0
Do not change anything else. You can use CAB file jgeerts suggested, it should do exactly the same.
Set your GPS application to use COM4, Baud rate 4800bps and Type 1 (if your program supports this).
It will take longer time to get a fix (especially cold start), but it should be more stable and reliable.
About the unstable fix:
I also encountered that periodical fix / unfix. It usually happened only after cold start of GPS (it was not used for a few days). It helps to leave it on for some time and wait, after a few minutes periodical unfixing was gone. Maybe it sounds crappy, but I tried Artemis along and during that time it did not get ANY fix .

Thanx, but still no stable fix... I try cab, registry settings and still periodical unfixing. Often helps to disable gps, change speed and then in 90% it is fixed. Did you install Igo or only copy it to SD card, like me? Maybe I have to try Tomtom or wait for next ROM (which I can adapt for me).

additional info ...
Alekss_UH said:
Thanx, but still no stable fix... I try cab, registry settings and still periodical unfixing. Often helps to disable gps, change speed and then in 90% it is fixed. Did you install Igo or only copy it to SD card, like me? Maybe I have to try Tomtom or wait for next ROM (which I can adapt for me).
Click to expand...
Click to collapse
I have tested it in two cars with TomTom v7.9, one car without special windows and one with special windows. on the first one I had no problems at all (no lag, stable fix) but on the other one I had a lot of lag and the fix is very unstable (periodical unfixing). I also have the same results if I'm using a real TomTom One device in these cars.
Are you using it in a car with special windows? If that's the case don't expect your Jade to work in it, the builtin GPS is not that sensitive!

Maybe I didn't say that fully exact, I have no problem with signal from satellites, I have about 12 satellites visible, from 4 to 10 active, fix about 15 to 60 seconds, but immediately after fix device get unfixed and it repeats forever... No matter how many satellites visible and active. I have to disconnect GPS, change speed of COM4 port and connect again. Often it helps, sometimes not.

iGO 8 on WIndows Mobile
HAve a dead GPS? Unlocked VoIP on WM 6.1?
Go here: http://forum.xda-developers.com/showpost.php?p=3067686&postcount=14

My jade has the same malfuntion too.
Gps has no more fix..
Till yesterday (around one month usage) all was fine..
Weird, This happened 12 hours after using Quick GPS funtion, downloading first time the sattelite Data.
Config. is ok ComPort 4 and boutrate is good enuf.
I am able to see three bars (three sattelite connection) in IGO8 GPS screen. But there is no red and yellow spots inside circle at upper left corner.
I wonder what is the relation with the voip etc.?

tom tom 7.45
i have tt 7.45 installed...it works ok but never has any sattelite bars at all - takes a while to fix ("poor gps reception) but then the planning etc goes well and TT works (no bars at all times). the lag is not there or very minimal.
xS
belgium

TomTom v7.45 -- Use version 7.9 instead !
gorila22 said:
i have tt 7.45 installed...it works ok but never has any sattelite bars at all - takes a while to fix ("poor gps reception) but then the planning etc goes well and TT works (no bars at all times). the lag is not there or very minimal.
xS
belgium
Click to expand...
Click to collapse
Version 7.45:
No sattelite bars
Can not use the new V8 maps
Does not warn (sound) if you're driving to fast
Version 7.9:
Has sattelite bars
Can use the new v8 maps
Produce warnings (sound) if you're driving to fast
Lag has nothing to do with the version you're using. I've installed and tested them all (TomTom, Garmin) and all of them had the same issue (lag!).
When using it in a car with special glass, the lag was worse. Using it in a car without special glass the lag was minimal and not really a problem.

No GPS Fix - Solution !
The issue occurs when you have not used the GPS for a long (more than a week) time. I also experienced the issue.
It seems that disabling AGPS caused the issue. So I made a small modification to the GPS settings (registry values) and the problem is solved.
I did the test with TomTom v7.9 and the GPS seems to work fine (no lag when used in a car with no special glas).
In attachment you'll find a cab to do the registry changes.
You need to do a soft reset after installing the cab and you also need to run QuickGPS prior (or at least once every 6 days) to run any navigation software.

I have tested this CAB and still the same problem that Alekss_UH, it fix and unfix signal GPS each second aprox. in my Jade, in TT 7.9 ang IGO 8.3 same problem....

QTEQ said:
I have tested this CAB and still the same problem that Alekss_UH, it fix and unfix signal GPS each second aprox. in my Jade, in TT 7.9 ang IGO 8.3 same problem....
Click to expand...
Click to collapse
Ths to jgeerts,
The same here.. tested.. but no use..
In outdoor, even some hours does not help..
If AGPS is on it is impossible to get fix..
The only way AGPS must be off, even so, 10 hours later refixing at the same place takes more than 10 minutes..
It is no concern w/ navsofts. I have four major navsofts installed, all have the same trouble..
It is not reliable..
is there any way to obtain support and sp from HTC ??

I have been 2 days with this GPS fix/unfix issue, and I think now it can be a HTC JADE / 3G ROM problem, besides several people is reporting same problem...
Visiting htc.com support:
HTC Touch 3G - English ROM for Middle East
HTC Touch 3G full English ROM is now available for download. As always, HTC is committed to providing customers with the best possible mobile experience.
Date: 2008-12-15 Category: ROM Upgrade
but not valid for all models or languages.

Which GPS software to use

Which version of which GPS software works on the Touch HD ? i used to use the Miomap and IGo8 on the Touch Cruise but cannot get them to work.
Perhaps with a tweak ?
thanks, yves

Just search the forum.
There are threads for iGO8, TomTom and Navigon. All of them work on the HTC Touch HD (with some tweaks).

http://www.66.com/route66/index.php?cid=UK&act=1&prodid=5723 works without tweaks.

iGO works but is not really useable in my opinion
there is no "programm close" button in expert mode, only one in simple mode.
program nearly never really gets closed by command.
voice from the navigation continues in programm-volume-setting, even after you are back in touchFlow and used task manager to stop the program.
it still runs and runs ..
a next problem is the standby mode.
you cant set it up, that while iGO is active, standby wont happen.
at the moment, you start navigation, wait some seconds without doing anything, but listening and the HD drops in standby.
and NO i dont want to set new windows standby settings everytime i want to use a navigation tool :/

I believe you can get them all working with the right tweaks.
I've used TomTom for years, without any problem. Currently using v7.910 on my Touch HD and it looks nice.
For fun I also downloaded Navigon (there's a two week free trial with full functionality) and with the help of a couple of xml files have it running. Different look and feel to Tom Tom but I like it. Probably worth a look for the two week free trial if nothing else.
Have seen iGo8 and I must say I like the look of it. Have seen a thread with details of a tweak, though that may have been for an earlier release.
Currently waiting for my TomTom services to run out (speed cameras and traffic) and then I may switch. The UI looks fantastic, but have to justify the cost to the missus .....

loadme said:
iGO works but is not really useable in my opinion
Click to expand...
Click to collapse
I don't know what you have messed up, but for me it works just fine. Not a single "bug" you mentioned has occured, maybe you are just using the wrong version / configuration.
I had also some problems in the beginning (dropping the gps), but after setting up the right configuration it works just fine for me now.

johnpatcher said:
I don't know what you have messed up, but for me it works just fine. Not a single "bug" you mentioned has occured, maybe you are just using the wrong version / configuration.
I had also some problems in the beginning (dropping the gps), but after setting up the right configuration it works just fine for me now.
Click to expand...
Click to collapse
You are correct, it works fine. However, occasional GPS drop does happen, and, from what I understand, it happens with all softwares, not just IGO. I would also be curious to know what configuration could possible effect GPS dropping issue?
Thanks

michael_r said:
I would also be curious to know what configuration could possible effect GPS dropping issue?
Click to expand...
Click to collapse
For me it was the wrong baud rate. It must be set to 9600. As I was using GPSGate I had to change the baud rate within GPSGate and not in iGO8.

loadme said:
iGO works but is not really useable in my opinion
there is no "programm close" button in expert mode, only one in simple mode.
program nearly never really gets closed by command.
voice from the navigation continues in programm-volume-setting, even after you are back in touchFlow and used task manager to stop the program.
it still runs and runs ..
a next problem is the standby mode.
you cant set it up, that while iGO is active, standby wont happen.
at the moment, you start navigation, wait some seconds without doing anything, but listening and the HD drops in standby.
and NO i dont want to set new windows standby settings everytime i want to use a navigation tool :/
Click to expand...
Click to collapse
Kinda strange that you are incapable of setting up a navigation software like igo on the Touch HD.
I myself only had to set the resolution and voila, all worked perfectly.
All the so called 'failures' are entirely untrue from my point of view.
Cause they work perfectly ! (yes also shutdown in expert mode), maybe your failure is using the correct settings in the sys.txt file...
Therfore I have to disagree with you completely on the IGO satisfaction scale.
I give it a 9,7 out of 10 (cause it can always be improved).
Tomtom is great and also is IGo in my opinion (havn't tried the rest om my HD).
with regards,
Ikkezelf

I am using Garmin Mobile XT, and it looks and works a treat.......
IGO8, does look good but there seems to be a lot of screen size problems for the HD. I too have tried IGO8 and all the stuffing around to get the correct screen resolution files sent me nuts.

I am using co-pilot 7, working well so far, especially when I remember to switch it from walking mode to car

A quick summary of my experiences with iGo 8, TomTom 7 and Garmin Mobile XT on the HD, in the UK.
iGo 8
Pros:
Has the nicest looking graphics, with terrain elevation and 3D models of major landmarks (and many more buildings too, in major cities) and a good variety of views.
Text-to-speech support for reading out road names, if you have enough memory (sometimes needs a reboot or to disable TouchFlo to get enough - sadly it doesn't default to the normal non-TTS if there's not enough memory, so you have to turn it back manually).
Routing between multiple maps installed.
Cons:
Long startup time.
Incorrect speed limits in my area (30 instead of 60-70 on some roads!)
The voice directions have been misleading when crossing a roundabout over a motorway, telling me to incorrectly take the first exit from a roundabout, when the direction arrow clearly shows the second. I verified by plotting a route on to the motorway that it also said "first exit" for that exit too. Very strange - I haven't seen problems with other roundabouts, yet.
Bad default POIs, listing the nearest cash machine as 25 miles away, when I was standing right next to one and no shops that I was looking for.
TomTom 7
Pros:
Reasonable across the board.
Cons:
Average default POIs, finding cash machines but not most shops.
Garmin Mobile XT
Pros:
Great default POIs, being able to track down most shops, etc.
Great free online services, such as Google local search, cheapest petrol
prices nearby, weather, traffic reports, flight status and Panoramio.
Being able to install subsets of maps, to reduce space on the device.
Cons:
Very slow graphics engine.

arghness said:
[*]Text-to-speech support for reading out road names, if you have enough memory (sometimes needs a reboot or to disable TouchFlo to get enough - sadly it doesn't default to the normal non-TTS if there's not enough memory, so you have to turn it back manually).
Click to expand...
Click to collapse
I'm using the latest iGO8.0.x release and haven't noticed any memory problem at all. I think it is a problem of the 8.3.X release(s), as they are not optimized for our devices yet. There are some sys.txt tweaks regarding to the tts functionality out there, maybe they will fix it for you.
arghness said:
Long startup time.
Click to expand...
Click to collapse
What do you mean by that? Mine is up and ready after 10 seconds (or something like that).
arghness said:
Incorrect speed limits in my area (30 instead of 60-70 on some roads!)
Click to expand...
Click to collapse
That's not iGO8's fault at all. The speed limits are integrated in the card material, mostly coming from tele atlas. For Germany the cards are really good.
arghness said:
Bad default POIs, listing the nearest cash machine as 25 miles away, when I was standing right next to one and no shops that I was looking for.
Click to expand...
Click to collapse
Haven't noticed any lacks of pois yet. But you can easily add pois (look for poi plaza).

johnpatcher said:
I'm using the latest iGO8.0.x release and haven't noticed any memory problem at all. I think it is a problem of the 8.3.X release(s), as they are not optimized for our devices yet. There are some sys.txt tweaks regarding to the tts functionality out there, maybe they will fix it for you.
Click to expand...
Click to collapse
I'll take a look, thanks. The normal voices are fine, just not the tts. It could be due to the high quality tts rather than the 11KHz pack.
johnpatcher said:
What do you mean by that? Mine is up and ready after 10 seconds (or something like that).
Click to expand...
Click to collapse
It's not unusable, it just takes longer than the others. Sometimes I want to quickly look something up. My usage scenario and my opinion of course
johnpatcher said:
That's not iGO8's fault at all. The speed limits are integrated in the card material, mostly coming from tele atlas. For Germany the cards are really good.
Haven't noticed any lacks of pois yet. But you can easily add pois (look for poi plaza).
Click to expand...
Click to collapse
I did say it was my experience in the UK. Also, I think that they do count as negative points against iGo as they make it less useful to me compared to the competition. Giving incorrect voice directions is bad, especially when the visual direction is correct. I'm glad you're happy with it - the graphics engine, buildings and terrain really are good. I'd love to see some online integration like Garmin, especially Google local search, which would make the POIs less of an issue.

Gps sofware in uae
Just for anybody here in UAE ... Sygic Drive 2008 from ORION MIDDLE EAST.. works great on my HD.. and its maps are more updated for the GCC regions.. atleast here in UAE..

My comparison between Garmin mobile XT Vs Mapking R12
hello
yesterday i have chance to fully try out my GPS function on my new HD
This is my findings...
I have expirient using Mapking R12 with my Tytn2 and it is much faster in the term of rerouting if u miss any turn,the accuracy is much better but the graphic is quite "cartoon"... anyway it is quite simple to use and straight forward....
With garmin mobile XT i found that, graphic is cool, many additional information such as speed limit, traffic light and ETA....time...
but it is not that easy to handle in term of finding your destination, etc...
it is slow responding and this can cause u miss some turn since u been passing that turn about 5-10 meters then only in the graphic u will reach there... the speed indicator also slow 10 Kmph...then my speedo meter
anyway i'm not really sure this is due to the sofware or the GPS chip... since i'm comparing my expirient with 2 different device that running with 2 different sofware
anyway i will try to run my HD with mapking and look the different....

Comparison TomTom 7, IGO 8 and INAVI
TOMTOM 7:
It has the most user-friendly interface and most stright-forward menu. You get whatever you want in just several pushes of buttons. Maps are very precise in west Europa and I think in the USA. In other countries maps aren't that good if they exist. It computes almost the best way. Better than all other programs.
IGO 8
It is the most complete navigation program. It has plenity of options. The drawback of this is that you will need more time to do the same thing. The most useful function not available in TomTom is easy moving and zoming map during navigation. It has maps for much more countries for Israel, Eastern Europa and they are more precise (there are even 3D buildings) and they take less space. If you travel outside Europa and USA or like exploring options then it will be the best choice.
INAVI
It is good. It's the only choice for eastern Europe and some other countries. It has many options (more than TomTom and less than IGO) but navigation is less easy and less precise than others. You can choose it if there is no maps for the country where you go.
Personally I choose TomTom 7 because of it's stright-forward interface. In the car you don't have a lot of time to play with options. 3D buildings don't interest me (I can see them through the window) and I live in west Europe.

Just installed Garmin Mobile XT
Updated to version 5.00.20wp
I'm impressed, works full screen and very smooth, Garmin Online is very well integrated, the interface is clean and easy to navigate, you can really just install and drive/walk off (I did not have to do anything to activate the GPS just plug in the MicroSD card and it automatically installed the soft and I could start navigating)
This does not mean that things cannot be customized, from my first look at the settings it looks like just about anything can be customized.
The integration with WM seems very complete too, from the large "Where to" button I can select a contact and it will have a large "Go" button to start navigating to it.
This morning I tested it in my car and I even got a phonecall during navigating which went flawless, the phone screen came on but I went back to Garmin Mobile via the Start menu and it continued navigating (the data connection was stopped so no more Garmin Online service but it did not stop the navigation)
Voice prompts and warning signals were quite clear through the HD speaker.
The only thing is that the location of my car holder might not be ideal on the open road it was ok but the GPS connection became quite erratic when I entered the city, the GPS info screen showed only 3 satellites that flickered on and off, when I took it out of the holder and held it to the windscreen things got better.

hijamir said:
the speed indicator also slow 10 Kmph...then my speedo meter
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Click to collapse
this is normal, the speedo in your car is set slower than the actual speed by design (so you don't think you're driving the speed limit but you're actually speeding). If GPS connection is good GPS speed can be accurate to about 0.1km.
On road GPSes there is always a 1 second lag (1Hz, professional and aviation GPSes can have multiple Hz updates) so accelerating/decelerating will not be correct but for constant speeds the GPS indication is superior to most cars speedos.

I've never had a gps device before, and am pretty new to the whole Winmo scene in general. I saw someone mention that Route 66 worked without tweaking so I bought a discounted version of their Route 66 Navigate 7. I wasn't able to install it directly from the CD, but their customer support responded within an hour or two telling me to copy the memory card directory from the CD directly to my HD's card and run the .cab from the phone.
Works great. Now I just have to fool around with it so I know how to actually use it effectively.. lol.
From their website they list the HD as compatible for their latest "8" version too. I just decided to get the old one for cheap since I don't really have a need for gps. Maybe I'll upgrade at some point if it's worth it.