lon/lat deg min vs. decimal - SailNet Community
 7Likes
Reply
 
LinkBack Thread Tools
post #1 of 35 Old 06-20-2013 Thread Starter
Puget Sound Pounder
 
kellysails's Avatar
 
Join Date: Nov 2008
Location: Bainbridge Island, Port Madison, WA
Posts: 636
Thanks: 21
Thanked 8 Times in 8 Posts
Rep Power: 7
 
lon/lat deg min vs. decimal

Maybe I am just old school but I REALLY dislike the increasing use of decimal based lon/lat coordinates. Am I just an old curmudgeon or totally valid in this belief. I have found a converter website, but what a pain. My plotter exports the waypoints in decimal, ugh! Makes me turn purple!

Who started this bad habit anyway?

lon=""-122.47994022"" lat=""47.61065114"" >"
-122 28' 47.7834" -47 36' 38.343"
kellysails is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 35 Old 06-20-2013
Senior Member
 
Dog Ship's Avatar
 
Join Date: Sep 2011
Location: Dolphin Beach, B.C.
Posts: 583
Thanks: 1
Thanked 19 Times in 19 Posts
Rep Power: 4
 
Re: lon/lat deg min vs. decimal

Quote:
Originally Posted by kellysails View Post
Maybe I am just old school but I REALLY dislike the increasing use of decimal based lon/lat coordinates. Am I just an old curmudgeon or totally valid in this belief. I have found a converter website, but what a pain. My plotter exports the waypoints in decimal, ugh! Makes me turn purple!

Who started this bad habit anyway?

lon=""-122.47994022"" lat=""47.61065114"" >"
-122 28' 47.7834" -47 36' 38.343"
Your plotter should have a programable choice between these methods of read out.
What type of plotter is it?

We have three rules;
No screaming.
No bleeding on the sails.
No slobbering on the charts.
Dog Ship is offline  
Quote Quick Reply Share with Facebook
post #3 of 35 Old 06-20-2013 Thread Starter
Puget Sound Pounder
 
kellysails's Avatar
 
Join Date: Nov 2008
Location: Bainbridge Island, Port Madison, WA
Posts: 636
Thanks: 21
Thanked 8 Times in 8 Posts
Rep Power: 7
 
Re: lon/lat deg min vs. decimal

Quote:
Originally Posted by Dog Ship View Post
Your plotter should have a programable choice between these methods of read out.
What type of plotter is it?
Simrad NSS12. I need to play with it some more and maybe I can work around it. The other options seemed to have some type of binary output, strange. I think this is gpx output if I remember right. I know Google Earth uses decimal format.
kellysails is offline  
Quote Quick Reply Share with Facebook
post #4 of 35 Old 06-20-2013
Senior Member
 
Minnesail's Avatar
 
Join Date: Feb 2013
Location: Minneapolis, MN
Posts: 1,326
Thanks: 140
Thanked 52 Times in 51 Posts
Rep Power: 3
 
Re: lon/lat deg min vs. decimal

With eight digits after the decimal you know where you are to within an eighth of an inch!
MarkofSeaLife and Seaduction like this.
Minnesail is online now  
Quote Quick Reply Share with Facebook
post #5 of 35 Old 06-20-2013
Senior Member
 
Dog Ship's Avatar
 
Join Date: Sep 2011
Location: Dolphin Beach, B.C.
Posts: 583
Thanks: 1
Thanked 19 Times in 19 Posts
Rep Power: 4
 
Re: lon/lat deg min vs. decimal

Nice plotter and it does have the abiity to read in degrees, you'll just have to mess about with it a bit.

We have three rules;
No screaming.
No bleeding on the sails.
No slobbering on the charts.
Dog Ship is offline  
Quote Quick Reply Share with Facebook
post #6 of 35 Old 06-20-2013 Thread Starter
Puget Sound Pounder
 
kellysails's Avatar
 
Join Date: Nov 2008
Location: Bainbridge Island, Port Madison, WA
Posts: 636
Thanks: 21
Thanked 8 Times in 8 Posts
Rep Power: 7
 
Re: lon/lat deg min vs. decimal

The plotter itself is all in deg mm sec, this issue is with the export tool. I think by definition, GPX format seems to be decimal oriented. There is one other export format that I have not tried yet, northstar.dat. Likely another binary format output though.

My question gets back to why did they create this stupid decimal methodology, errr. ?? Landlubbers messin' in our kitchen?
kellysails is offline  
Quote Quick Reply Share with Facebook
post #7 of 35 Old 06-20-2013
Senior Member
 
Join Date: Oct 2011
Posts: 1,421
Thanks: 13
Thanked 24 Times in 24 Posts
Rep Power: 4
 
Re: lon/lat deg min vs. decimal

Quote:
Originally Posted by Minnesail View Post
With eight digits after the decimal you know where you are to within an eighth of an inch!
Latitude or Longitude??
MarkofSeaLife and Minnesail like this.
Seaduction is offline  
Quote Quick Reply Share with Facebook
post #8 of 35 Old 06-20-2013
Wannabe Sailing Bum
 
happy_sailor's Avatar
 
Join Date: Jun 2013
Location: Motown
Posts: 27
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 0
 
Re: lon/lat deg min vs. decimal

I prefer the decimal system, mostly because that's what I learned in college and while I was on the ship. It would be nice if there was one standard. I wouldn't mind using Degrees/Minutes/Seconds if that was all I had to know.

Make each moment an occasion to live deeply, happily in peace.
-Thich Nhat Hanh

Yippee Kai-Yay
Thistle #697 (currently in my garage with a hole in it)
happy_sailor is offline  
Quote Quick Reply Share with Facebook
post #9 of 35 Old 06-20-2013 Thread Starter
Puget Sound Pounder
 
kellysails's Avatar
 
Join Date: Nov 2008
Location: Bainbridge Island, Port Madison, WA
Posts: 636
Thanks: 21
Thanked 8 Times in 8 Posts
Rep Power: 7
 
Re: lon/lat deg min vs. decimal

Quote:
Originally Posted by happy_sailor View Post
I prefer the decimal system, mostly because that's what I learned in college and while I was on the ship. It would be nice if there was one standard. I wouldn't mind using Degrees/Minutes/Seconds if that was all I had to know.
So how do you plot/record position fixes on a paper chart with a decimal system?
kellysails is offline  
Quote Quick Reply Share with Facebook
post #10 of 35 Old 06-20-2013
Senior Member
 
Minnesail's Avatar
 
Join Date: Feb 2013
Location: Minneapolis, MN
Posts: 1,326
Thanks: 140
Thanked 52 Times in 51 Posts
Rep Power: 3
 
Re: lon/lat deg min vs. decimal

Quote:
Originally Posted by kellysails View Post
The plotter itself is all in deg mm sec, this issue is with the export tool.

...

My question gets back to why did they create this stupid decimal methodology, errr. ?? Landlubbers messin' in our kitchen?
Programmers messin' in your kitchen!

If it's part of an export tool, that makes sense to me. Internally the software isn't going to keeping separate variables for degrees, minutes, and seconds. It's just going to use one big number. It might convert it to minutes to show you on the screen, but inside it's just one number.

Same with dates and times. Microsoft rather arbitrarily set 0 to be midnight on December 30, 1899. So 0.5 would be noon of the same day, 2.5 would be noon of January 1, 1900. Right now, in Central time, it's 41445.55.
Minnesail is online now  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome