Looks like AGPS uses WIFI and cell-phone tower locations.
The problem for my app is that I don't necessarily have access
to data service - so AGPS will not work.
Even though I want to do want AGPS does - i.e. provide a
start location for getting satellite queries. But my understanding
is that
AGPS does NOT use wifi and cell tower
locations. http://en.wikipedia.org/wiki/Assisted_GPS
On Sunday, March 10, 2013 8:33:05 AM UTC-4, dashman wrote:
Looks like AGPS uses WIFI and cell-phone tower locations.
The problem for my app is that I don't necessarily have access
to data service - so
If the GPS has been on and the user turns off the screen, there's
nothing you can do to really get a better approximation to location.
Let's be realistic here: how accurate does your signal need to be? If
it's pinpoint accuracy (within 60-200 m) then you should be getting
constant fixes anyway.
On Sat, Mar 9, 2013 at 12:28 PM, dashman erjdri...@gmail.com wrote:
is there any way to initialize the LocationManager gps provider with a
starting point for the lock - i.e. a lat/lon geo pos to start at.
No, and that wouldn't speed things up anyway.
There's nothing stopping you with
Although having some idea of where the device is lowers cold start
times, there's not a direct API for specifying where you think the
user might be.
Kris
On Sat, Mar 9, 2013 at 2:29 PM, TreKing treking...@gmail.com wrote:
On Sat, Mar 9, 2013 at 12:28 PM, dashman erjdri...@gmail.com wrote:
ok - maybe there's other methods.
i've seen apps decrease lock time by contacting NTP servers.
Also apparently assisted gps helps - assisted gps just gets a
wifi geo location - and just using that helps.
i have a geo location also.
i'm sure gps lock speeds can be decreased if you have an
AGPS doesn't use WiFi. It uses precomputed Almanac/Ephemeris data so the
GPS receiver has a better idea which satellites to expect, and where. That
data needs to be refreshed every x days (usually 3 to 7), and is injected
into the GPS receiver management software. I don't think that software is
-developers@googlegroups.com] On Behalf Of dashman
Sent: Saturday, March 09, 2013 8:10 PM
To: android-developers@googlegroups.com
Subject: Re: [android-developers] improving gps lock time
ok - maybe there's other methods.
i've seen apps decrease lock time by contacting NTP servers.
Also
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