Convert Dd (decimal Degrees) To Dms (degrees Minutes Seconds) In Python?

How do you convert Decimal Degrees to Degrees Minutes Seconds In Python? Is there a Formula already written?

Solution 1:

This is exactly what divmod was invented for:

>>>defdecdeg2dms(dd):...  mnt,sec = divmod(dd*3600,60)...  deg,mnt = divmod(mnt,60)...return deg,mnt,sec>>>dd = 45 + 30.0/60 + 1.0/3600>>>print dd
45.5002777778
>>>decdeg2dms(dd)
(45.0, 30.0, 1.0)

Solution 2:

Here is my updated version based upon Paul McGuire's. This one should handle negatives correctly.

def decdeg2dms(dd):
   is_positive = dd >= 0
   dd = abs(dd)
   minutes,seconds = divmod(dd*3600,60)
   degrees,minutes = divmod(minutes,60)
   degrees = degrees if is_positive else -degrees
   return (degrees,minutes,seconds)

Solution 3:

If you want to handle negatives properly, the first non-zero measure is set negative. It is counter to common practice to specify all of degrees, minutes and seconds as negative (Wikipedia shows 40° 26.7717, -79° 56.93172 as a valid example of degrees-minutes notation, in which degrees are negative and minutes have no sign), and setting degrees as negative does not have any effect if the degrees portion is 0. Here is a function that adequately handles this, based on Paul McGuire's and baens' functions:

def decdeg2dms(dd):
    negative = dd < 0
    dd = abs(dd)
    minutes,seconds = divmod(dd*3600,60)
    degrees,minutes = divmod(minutes,60)
    if negative:
        if degrees > 0:
            degrees = -degrees
        elif minutes > 0:
            minutes = -minutes
        else:
            seconds = -seconds
    return (degrees,minutes,seconds)

Solution 4:

Just a couple of * 60 multiplications and a couple of int truncations, i.e.:

>>>decdegrees = 31.125>>>degrees = int(decdegrees)>>>temp = 60 * (decdegrees - degrees)>>>minutes = int(temp)>>>seconds = 60 * (temp - minutes)>>>print degrees, minutes, seconds
31 7 30.0
>>>

Solution 5:

This is my Python code:

defDecimaltoDMS(Decimal):
    d = int(Decimal)
    m = int((Decimal - d) * 60)
    s = (Decimal - d - m/60) * 3600.00
    z= round(s, 2)
    if d >= 0:
        print ("N ", abs(d), "º ", abs(m), "' ", abs(z), '" ')
    else:
        print ("S ", abs(d), "º ", abs(m), "' ", abs(z), '" ')