EC2 Polarity and Coordinates for Measurements  -SA



    |------------------
    |     -------- 
    |      -----     North Pole
    |
    |
    |                          +y
    |                    +x <-----> -x   
    |                          -y
    |
    |      ------    South Pole
    |    ---------
    |    ---------
    |    ---------
    |-----------------