Hi, Probably not what you are after, but you could also use an external bluetooth GPS device, some of these devices provide 10hz output.
Regards On Thursday, August 2, 2012 12:18:33 AM UTC+10, bushido wrote: > > Hi all, > > I'm writing an application for android for which I need good position > accuracy, I use a Galaxy Nexus as test device. > > My test application subscribes to location updates and draws a car > symbol in a map, the map is centered to the location of the car & > rotates according to the bearing of the location (exactly like google > maps on android does). I noticed that when up to speed, the positions > don't match with reality, they lag behind considerably. > When I cross a street at 90km/h for example, it will take a few > seconds before the car on the map is also crossing that street. It > isn't an error in the map data, because when I'm standing still, the > car gets drawn on the correct location. Google maps for android shows > exactly the same behavior. > > The position of the car in Google Navigate on the other hand matches > reality rather closely. I've noticed that the position updates are a > lot smoother as well. (10Hz rather than the 1Hz updates which you get > from GPS) > > My question is: how do they do it? What I can think of is: > - using the phone's sensors (gyro & accelero) together with a kalman > filter or similar. But I can't see how you could make that work for > every phone, since not all phones have these sensors. > - interpolating, but in that case I would expect overshooting when > there is a sudden stop or a sharp corner > > Thanks in advance. > Bushido > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
