decimal_degrees.py 文件源码

def decimal2dm(decimal_degrees):
    """
    Converts a floating point number of degrees to the degress & minutes.

    Returns a 2-element tuple of decimals.

    If 'decimal_degrees' is negative, only degrees (1st element of returned
    tuple) will be negative, minutes (2nd element) will always be positive.

    Example:

        >>> decimal2dm(121.135)
        (Decimal('121'), Decimal('8.100'))
        >>> decimal2dm(-121.135)
        (Decimal('-121'), Decimal('8.100'))

    """
    degrees = D(int(decimal_degrees))

    minutes = libdecimal.getcontext().multiply(
        (D(str(decimal_degrees)) - degrees).copy_abs(), D(60))

    return (degrees, minutes)