11

I'm trying to map out a set of coordinates that I received:

 N 39,21.440 W 120,48.076

But i'm not familiar with the format. I'm familiar with DMS lat/longs and the standard(?) format (eg, 39.123234, -121.348348)

Can anyone tell me how I can convert these to either DMS or standard?

  • 3
    Looks like degrees and decimal minutes? – Joe Dec 14 '16 at 16:43
  • 2
    If you (or anyone else) has a similar question in the future: it is really helpful to add what the expected domain of the coordinates is. If all the coordinates are expected to be within a single country (or a state or whatever) it might be a system local to that place, while coordinates that could possibly lie anywhere in the world are a completely different hint at a world-wide coordinate system. – Jasper Dec 14 '16 at 21:57
23

They are likely "Degrees, Decimal Minutes".

Conversion to Decimal Degrees

You can convert it to "Decimal Degrees" by diving the "Decimal Minutes" by 60 and adding the result to the Degrees:

21.440 / 60 = .3573333333 + 39 = N 39.3573333333 

48.076 / 60 = .8012666666 + 120 = W 120.8012666666

Conversion to Degrees Minutes Seconds

Or you can convert to "Degrees Minutes Seconds" by multiplying the fractional side of the "Decimal Minutes" by 60 to get the Seconds:

21.44 = .440 * 60 = 26.4 = N 39 21 26.4

48.076 = .076 * 60 = 4.56 = W 120 48 4.56
  • 1
    "Adding" to the degrees before assigning the proper sign -- W120 should be -120 in DD. – Vince Dec 14 '16 at 16:53
  • I was trying to keep it too simple... I edited my answer to include the W – kttii Dec 14 '16 at 17:15

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