def _convert_to_degress(value):
    """
    Helper function to convert the GPS coordinates 
    stored in the EXIF to degress in float format
    """
    d0 = value[0][0]
    d1 = value[0][1]
    d = float(d0) / float(d1)
    m0 = value[1][0]
    m1 = value[1][1]
    m = float(m0) / float(m1)
    s0 = value[2][0]
    s1 = value[2][1]
    s = float(s0) / float(s1)
    return d + m / 60.0 + s / 3600.0
