accelerometer - iOS - Interpreting the CLHeading's x,y,z values -


i trying meaningful "device orientation" information values read clheading class updates of cllocationmanager object. class contains 3 values, x,y,z in microteslas , understand docs, vector pointing magnetic north of earth device's magnetic bias filtered out. now, want sure is, in coordinate system have these readings? relative device's own coordinate system shown in following picture:

coords

which used core motion framework?

additionally, there robust,established way can frame axis vectors in picture above? according readings, ios not provide exception of "attitude" of device, provided (pitch,yaw,roll) angles of device updated core motion framework's startdevicemotionupdatesusingreferenceframe method. found these angle values unreliable, since fluctating device stands still. need device's orientation data precise possible, since going use data calibration of system of cameras.

thanks in advance.

according experiences moment asked question, seems yes, magnetic north vector in device's own coordinate system, gravity vector obtained accelerometer.


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