compass-geolocation

I have seen a few examples of this but am not sure exactly how to implement it, (such as iPhone Compass GPS Direction ) in do I need to call calcBearingWithLatitude in (void)startup? All I am trying to do is have the compass pull a point from memory and use that point as its "north" so to speak and point to it, no need for distance or anything like that. My implementation file as of now looks like @implementation TrackerViewController @synthesize locationManager; @synthesize compass; @synthesize headingLabel; - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; if (

All of the guides to getting compass orientation in Android I've found have a bug: when you hold the phone in portrait mode and "look" above the horizon, the compass arrow turns 180 degrees from the correct direction. Google Maps orientation indicator doesn't have this problem. Another nice thing that Google Maps have is that they somehow estimate compass accuracy. Any idea how they do this? Error you ask is caused because of Euler angles or called Gimbal Lock. To solve very high angle difference, you should check if your device is flat or not checking inclination after getting inclination

I have this method for figuring out the difference between 2 0-360 compass headings. Although this works for figuring out how far absolutely (as in, always positive output) off I am, I am having trouble figuring out what needs to be done to introduce the sign into the output. Ideally, if the shortest distance from the initial heading to the final heading is by going around clockwise, I'd like the error to have a positive sign, if the shortest distance between the headings involves going around counterclock-wise, I'd like the error to have a negative sign. A few examples of desired inputs

This question already has an answer here: Calculate compass bearing / heading to location in Android 13 answers I'm developing an android application where I want the compass to point to a particular latitude longitude position instead of the usual north location. Can anyone suggest how to implement this. I've developed an application which points to north direction. Thanks in advance in how to implement this. Any demo application which does this would be of great help. Check out this tutorial. It should get you started in the right direction Compass Tutorial Also here is another good one

I have a quick question about the accelerometer in Android devices. Is it always on/active? Given that accelerometer is used to detect the orientation of the device, either landscape or portrait. In the official documentation ( SensorManager ) it states that sensors should be turned off to save power. But I wonder if this only applies to others sensors like magnetic field sensors, gyroscope, light sensor and so on. I need to make a case for power conservation and I don't want to make the mistake of saying that the accelerometer can at times be disabled, and instead use it for the purpose of

Do any one have idea for finding true direction using iPhone? I want to implement such application in which I need to find direction in which iPhone is pointing and want to make application same as compass application in iphone 3GS. Does iPhone 3G supports compass functionality? And can any one tell me how compass application find directions so accurately like a real magnetic compass? Please help me for this. I am in a critical situation. Thanks in advance. akshayk80 here is a sample code link from apple.com for using magnetometer and Core Location https://developer.apple.com/library/ios/

i made my own application in Android that use compass and accelerometer sensors to display the degrees of rotation and inclination of my device. I initialized all the listener and objects i needed (i followed some tutorials), and now i can catch the degrees as i wished. The problem is that the measures that sensors return aren't accurate. I mean even if i try to round the values of degrees i catch from the sensor, they oscillate between -/+ 7 (or 8) degrees every fraction of a second, even if i stay in a grass field away from any disturbing source. What i want to have is a accurate measure of