gps

I am using the location manager's requestLocationUpdates() method to receive an intent to my broadcast receiver periodically. The system is correctly firing the intent to my receiver, and I have been able to use it correctly. The only problem is that the GPS location provider only stays active for a few seconds after the initial location acquisition, and I need it to stay on a little longer so that the location estimates are more accurate. My question is how to make the GPS location provider stay active for each periodic request that comes from the LocationManager requestLocationUpdates. Does

When I enter a screen, I check for if GPS is turned on, if not, the dialog to enable GPS is shown. When user clicks Yes, onActivityResult -> GPS is turned on and I try to get the location but this always returns null When I enter the screen with GPS already on, location is retrieved properly. I have been struggling with this for few days now and can't seem to find any resources. UserLocationUtilities.java public class UserLocationUtilities implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener{ GoogleApiClient googleApiClient; Activity

For an application I'm writing we are interfacing IOS devices with an external sensor which outputs GPS data over a local wifi network. This data comes across in a "raw" format with respect to altitude. In general all GPS altitude needs to have a correction factor applied related to the WGS84 geoid height based on the current location. For example, in the following Geo Control Point ( http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HV9830 ) which resides at Lat 38 56 36.77159 and a Lon 077 01 08.34929 HV9830* NAD 83(2011) POSITION- 38 56 36.77159(N) 077 01 08.34929(W) ADJUSTED HV9830* NAD

I'm starting to deal with gps data on Android 2.1 (HTC Hero) and look around on topics about Kalman filter and least squares fit to location data. While receiving and logging GPS data using phone I've found small dispersion if staying on position, but coordinates are pretty accurate when moving. Here comes the question: - Do getLatitude() and getLongitude() functions provide "raw" coordinates, or data was pre-filtered by android (while position is fixed or during movement)? I'm curious if anyone tested Kalman on android and it's possible to say that you have certain improvements with gps. In

I have an activity in my app where there are images I use as maps. If the image is "grid aligned" to google maps then when I use the top left and bottom right corners of the map I get from googlemaps online then I can turn the users gps into an x and y on screen. However if the map is not "grid aligned" and is at an angle than the values my math returns draws the users position off screen. Obviously I am missing the part on how to handle the angle of the map so if anyone could shed some light on how to do that it would be super helpfull. I know I would have to figure out the angle in radians

I am making an application which needs to be able to find people nearby, who are users of my app. I looked at many answers of precedent similar questions, and it seems I have no choice but to keep uploading a user's current location to the server, and get nearby users' list when necessary. Then my question is, 1. To get the nearby list, there should be some algorithm or function which calculates the distance. Then doesn't that mean I have to get all distances between my location and the rest of the app users? So the server returns certain number of users who have the least distance results. If