Effect of Calibration on Magnetometer Compass Heading

As shown in figure, the difference can be realised for compass heading calculations. Ideally, Compass heading should be in the range of 0-360 degrees. However, without the calibration, it is maximum heading value found as 248.54 degrees, and the minimum value is calculated 158.45 degrees. Compare to calibrated magnetometer give out appropriate 0-360 degrees compass heading values.