gps

I am using fused location provider from the new GooglePlay API(LocationClient class). But the method Location.GetSpeed() is not returning correct speed (shows 0). I read that I have to use LocationManager class to get the speed, but when I tried LocationManager a new problem occured. The location manager NetworkProvider is not working, here is a thread with the problem http://code.google.com/p/android/issues/detail?id=57707 . So what is the best way to get the speed of movement. I tried calculating it distance/time but it is not accurate.. The only sensor that delivers speed is GPS. Wlan and

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I'd like to use reliable locations, even on an old iphone. However, many readings (particularly from cell towers) are too inaccurate. I think. When I plot my position + accuracy radius (or look at google maps app), I notice the center of the estimated circle is generally close to my physical location. I'm guessing that if I cut the "accuracy" number in half, I'll still be in the circle 99% of the time. I believe this is a probabilistic game - the location manager is trying to provide an estimate that's correct 99.99999% of the time, so they give a deliberately wide margin. Any thoughts/info?

I want to display a signal bar for a GPS device using .NET CF. I'm able to read NMEA data and get the SNR signals. But they are a number of satellites with some active and some inactive with various SNRs. I thought about getting average of total SNR but it won't give a accurate value as three strong signal satellite is enough for GPS fix and with another 5 satellites with bad SNR can mess up the signal bar calculation. How am I gonna calculate GPS signal in percentages in a proper way? Use the GSA NMEA sentance to get the Dilution of Precision : This sentence provides details on the nature of

After some searching on Google, I ask myself: Is it possible to build a compass (simple showing the heading/direction) with the iPhone 3G's GPS sensor? I have the suspicion, that this is only possible, if the device is moving. Any ideas are appreciated. Yes, you are right, that's the only way. Although I think once you know the direction, you could track small movements of the phone from acceleration sensors and draw the direction accurately even if the original movement stops. Note: This is outdated info, it was correct up until 3Gs came out. Unfortunately I can't delete accepted answer so

I'm writing an app that needs to determine whether a user falls within one of several defined zones (based on gps location). The Google maps javascript API has an easy to use function containsLocation() . However I want to be able to do this from an app on android, not a web-based service. Does anyone know if such a call exists in the android version of maps? Any pointers will be helpful! A bit late, but here's the answer: com.google.maps.android.PolyUtil.containsLocation() from Google Maps Android API utility library. You can use the Geofencing feature for this purpose. The API's for that are