HMC5883L Compass Magnetic Declination Help

Projects Programming
1

Can some one please explain if I am doing this part correctly?

// Once you have your heading, you must then add your ‘Declination Angle’, which is the ‘Error’ of the magnetic field in your location.
// Find yours here: http://www.magnetic-declination.com/
float declinationAngle = +3.70; //-0.1742;
heading += declinationAngle;

According to the Link: http://www.magnetic-declination.com/

my information is as follows:

Winnipeg Manitoba
Latitude: 49° 53' 3.8" N
Longitude: 97° 8' 49.3" W
Magnetic declination: +3° 7'
Declination is POSITIVE (EAST)

Inclination: 74° 50'
Magnetic field strength: 57079.2 nT

But I'm not sure I am using the values correctly:
float declinationAngle = +3.70;

Also which direction should the board be facing to point North? I keep thinking the "Y" marking on the board would indicate the facing forward.?
2016-03-25_10-30-03 by Michael Knight, on Flickr

2

Please do not cross post.

3

any solution? I have he same problem.

4

have a look at those links.

hope that helps.