Database Develop

GPS-A (Gps assist), hardware or software?

Hi,
I know (for example) the HTC Diamond, the internal GPS does an GPS Assist (send data packet to network to help GPS do triangulation, speeding GPS location. The obvious problem, is that I have to paid to my service provider that (one) data packet (in my case, 0.33€).
What I really dont know, if this is a software or hardware specification. I want to sincronyze my Niki with an Holux 236 (I'm searching for one), and I dont know I will have to paid anything to navigate around my country.
Anyone can help me?

Hi, I think we all need some clarification on the GPS vs. aGPS.
Here is a good article to read:
http://wmexperts.com/articles/gps_vs_agps_a_quick_tutorial.html
In conclusion you need a receiver in order to have any type of GPS on your phone. In most cases aGPS doesn’t require the maps to be present on your phone as they are been downloaded in real time.
If you have a GPS receiver on your phone you can use other software (like Garmin or TomTom) with maps loaded on you card. In this case there is no need for data communication and you can use it without paying aGPS fees. I confirm that as I use it on my Neon400.
The location identification through tower triangulation cannot be done with good accuracy and not in “real time”. It is not reliable for car navigation but it is used for police, etc to find your approx. location.

Problem with the AGPS of my N1

When the phone has GPS turned off, my location on Google Maps is 5 to 10 km off based on cell tower positioning. I am pretty sure it has nothing to do with my service provider because when I put in the same SIM card in my Nokia phone, which also has an AGPS chip, it reports my location on Google Maps pretty accurately to within 100 meters with cell tower location on and GPS off. Is this a software issue of my Nexus One or a hardware issue?
I'm from Toronto, Canada btw.

Someone correct me if I'm wrong, but AGPS has nothing to with cell tower triangulation per se. AGPS uses the position it gets from cell tower triangulation together with a list of satelite positions to tell the GPS chip roughly where it is so it can get a fix quicker.
I do get my position within a 100 meters with the GPS off though.

As above, that's not aGPS, it's triangulation, and it's not overly accurate. The longer you leave it, the more precise it should get though.
I saw my position reported as 'accurate to 5,000m' on Saturday, didn't last too long though.

It sounds like there is a specific problem with the service used to approximate your position in your area. It's like the tower lookup is off for some reason.
You can test this out by using your Nokia, and manually changing it from Nokia's service to Google's service. You can do that. In the position settings on the Nokia, type in Google's server address and see if your Nokia now reads 5-10 km off as well. Then you will at least know if its the lookup service or not.

Thanks for the correction. what I meant to say is that my location is way off when I have gps turned off, compared to my Nokia.
RogerPodacter said:
It sounds like there is a specific problem with the service used to approximate your position in your area. It's like the tower lookup is off for some reason.
You can test this out by using your Nokia, and manually changing it from Nokia's service to Google's service. You can do that. In the position settings on the Nokia, type in Google's server address and see if your Nokia now reads 5-10 km off as well. Then you will at least know if its the lookup service or not.
Click to expand...
Click to collapse
thanks. do you know what the Google server address is? I want to test it out.

supl.google.com

if ur standing still and waiting on gps itll take a really long time
if u stand close to ur wifi router with wifi on itll find a pretty accurate spot for u
if u start moving with gps on itll find u faster because your jumping between sat signals and cell towers

NexusDro said:
do you know what the Google server address is? I want to test it out.
Click to expand...
Click to collapse
Wont make any difference to triangulation though.

He is only interested in the triangulation service, not the actual true gps function. Nokia has their own service for this based off of a global cell tower database, and Google also has their own similar service.
He's thinking that Google's database is malfunctioning in his particular area, which is why I suggested he try out Nokia's server address to compare.

Yup, that's what I want to find out. Thanks!

Location problem with an interesting twist

Hey guys.
Here's the interesting problem i have:
When i open google maps (and not only, this happens with the weather widget) it shows my location for a minute. After that minute it moves my position to my EXACT address in my home town that's 250 km (156 miles) away. After another minute it moves again to my current position and stays there.
To fix this i tried to look into my google profile/account settings and i don't have an address stored there. Even if i did, i would have never inserted the exact address, only the city. So its not related to this.
The next thing i did was to change my wireless network ssid because both wireless networks from home and current city have the same ssid. The assumption is that the phone stored the location of the wifi network once connected to it. That's fine, but why would it happen when the ssid of wifi network of my current location has been changed?
Factory resets don't help and this happens on 2.1 and 2.2 too.
Please give me some suggestions. Thanks.

Anyone...?

I think nexus one does store this somewhere on the phone.. because i now have problem on 2.2
Now agps wont work... i cannot locate myself if i m indoor
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[Q] Your location is currently unavailable.

Sorry for another GPS question. I know that the GPS is meant to be inaccurate, but I can't get it to work at all with Google Maps. I always get the "Your Location is currently unavailable" message when I try to find my location with it. I upgraded to the latest firmware over KIES but that didn't fix it. It sometimes works with other apps, and the tests seem to show it connecting (if slowly and inaccurately). Does anyone know how to fix this?

"Your Location is currently unavailable" doesn't come from the GPS, but it comes from the Tower Network Location Service that is the other check box above the GPS settings screen

Just fixed his very issue
I had no blue dot in Google Maps.
I needed to disable wifi. Enable data through 3G.
The blue my location returned with my towers position.
I disabled 3g, enabled wifi.
All fixed now, very relieved

thanks but neither of these methods work.

Maybe your telco does not provide tower info

it actually started working again randomly. this might be a stupid question but why does google maps not use the Gps?

TNStrangelove said:
it actually started working again randomly. this might be a stupid question but why does google maps not use the Gps?
Click to expand...
Click to collapse
it can use both
Towers and/or GPS

i too have some issues with google maps and my location:
ignoring how long it takes to get my location (sometimes really fast, sometimes too long) ... it seems that it get the position using just wifi (gps ans gsm disabled), with gps, or just with the gsm on ... cool
but: sometimes i don't get my location in google maps (location unavailable!), even though i can get it in other applications that use google maps : like a tracking app ... or in google earth ... or in antennas ... etc
how can i fix this?
thank u!

[Q] WiFi Only GPS Questions

I was curious as to why there is a button in the notifications menu to turn GPS on and off. I started to look in to it and discovered that there is indeed a GPS chip in the wife only version, or there seems to be anyway!
My question is, what does that chip exactly do? Does it only pick up your location? I can't seem to find any places around me with wifi off. I'm assuming that means all the map and location data is delivered over the internet through 3g or wifi. Is there anyway to use my device as I would a regular GPS device? I know it has all the features but can they work through the GPS chip like they do in a GPS device? Or is there anyway to get this to work?

spyderz said:
I was curious as to why there is a button in the notifications menu to turn GPS on and off. I started to look in to it and discovered that there is indeed a GPS chip in the wife only version, or there seems to be anyway!
My question is, what does that chip exactly do? Does it only pick up your location? I can't seem to find any places around me with wifi off. I'm assuming that means all the map and location data is delivered over the internet through 3g or wifi. Is there anyway to use my device as I would a regular GPS device? I know it has all the features but can they work through the GPS chip like they do in a GPS device? Or is there anyway to get this to work?
Click to expand...
Click to collapse
Ok the wifi is mainly just for accessing networks either open or via ssd and password. You can also connected with mobile AP if your mobile has this option.
The GPS on the other-hand is for mapping and location based services like navigation etc (you can use copilot and several other gps based apps with the P1010). Some of these apps will also piggy back any Bluetooth and or wifi connections that are available for further triangulation if needed. So if you have any apps like various weather and navigation then the GPS is required (but also your location can be shared via your wifi and opt in to give this info through google).
Hope this helps

spyderz said:
I was curious as to why there is a button in the notifications menu to turn GPS on and off. I started to look in to it and discovered that there is indeed a GPS chip in the wife only version, or there seems to be anyway!
My question is, what does that chip exactly do? Does it only pick up your location? I can't seem to find any places around me with wifi off. I'm assuming that means all the map and location data is delivered over the internet through 3g or wifi. Is there anyway to use my device as I would a regular GPS device? I know it has all the features but can they work through the GPS chip like they do in a GPS device? Or is there anyway to get this to work?
Click to expand...
Click to collapse
you can find your location via wifi, enable your wifi and turn gps on, you'll find your coordinates, but not that accurate compare to 3g