
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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February 24th, 2016, 12:27 AM  #1 
Member Joined: Jan 2016 From: Uk Posts: 80 Thanks: 2  Converting Degrees minutes to decimal
Hi, When converting from Degree minutes etc to decimal and visa versa, I need to borrow but don't know how to do it. (I've realised that I don't know how to ask the question so here's an example) 50.5Deg so (.5) /.6 +the 50= 50.8 (Now the other way) 50.8 .8x.6 + the 50= 50.6 Now if I used a larger number after the '.' 50.7Deg (.7)/.6 = 1.1666 +the 50 = 51.1666 What I want is get the 1 from the 51 so that 1.1666x.6 = 0.7 then + 50 = 50.7 Camerart. Last edited by camerart; February 24th, 2016 at 01:07 AM. 
February 24th, 2016, 03:19 AM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,771 Thanks: 1426 
Converting decimal degrees to degrees and minutes ... $50.5^\circ = 50^\circ + 0.5(60') = 50^\circ \, 30'$ $50.7^\circ = 50^\circ + 0.7(60') = 50^\circ \, 42'$ ... note $0.1^\circ = 6'$ Converting degrees and minutes to a decimal ... $49^\circ \, 48' = 48^\circ + \left(\dfrac{48}{60}\right)^\circ = 48.8^\circ$ Check out the video for a more complete explanation ... 
March 11th, 2016, 12:19 AM  #3 
Newbie Joined: Mar 2016 From: Philippines Posts: 1 Thanks: 0 
The calculation equation is simply: Decimal degrees = whole number of degrees, plus minutes divided by 60, plus seconds divided by 3600

March 18th, 2016, 02:56 AM  #4  
Member Joined: Jan 2016 From: Uk Posts: 80 Thanks: 2  Quote:
Just seen your post, Thanks. C.  
March 21st, 2016, 11:59 AM  #5  
Math Team Joined: Jan 2015 From: Alabama Posts: 3,261 Thanks: 894  Quote:
Quote:
 
March 22nd, 2016, 02:12 AM  #6 
Member Joined: Jan 2016 From: Uk Posts: 80 Thanks: 2 
Hi, I still get mixed up between: Degrees, Mins decimal mins and Degrees, mins and seconds and Degrees and decimal mins seconds. Here is an NMEA sentence: $GPGGA,FIELD.00,1234.50000,N,xxxxx.xxxx,W,1,08,0.9 ,000.0,M,46.9,M,,*47 The digits before the N are Latitude, and = 12Deg 34Mins .50000 So Degrees, Mins and decimal mins. This would convert to Degrees, Mins and seconds, So 12Deg, 34Mins and 30 seconds. And for even more complication Degrees, and decimal Mins, seconds. I sometimes need to convert between all three of these, but I can appreciate that converting to NMEA sentences is a lot of work, so keep it simple for your own amusement C. 

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