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Thread: Degrees, Minutes, Seconds or Decimal Degrees.

  1. #1
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    Degrees, Minutes, Seconds or Decimal Degrees.

    Bought a HN6 a while back and just getting to know it.
    Now when we were cruising in the yacht all my navigation was in DMS and the Hema is in DMS and all my maps are DMS.
    Joined CMCA and they have a thing called Geowiki that lists dump points etc. Their co-ordinates are in DD.
    Is this becoming more common?
    How many use DD for their navigation?
    Can my Hema be changed to read in DD as well?

    Keith

  2. #2
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    Every gps I've owned or used, has choices in the Settings menu for DD, DMS, etc.
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    1999 Disco TD5 ("Bluey")
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    1966 No 5 Trailer (ARN 173 075) soon to be camper
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  3. #3
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    Hi
    Google Earth and Maps use DD, but will accept other inputs. This may eventually make DD the accepted default.

    We saw some very interesting places by not realising that the Camps 5 book was in DMS an our Garmin Nuvi was still set at DD.

    Cheers

  4. #4
    JDNSW's Avatar
    JDNSW is offline RoverLord Silver Subscriber
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    I've been using DMS for about 70 years - and don't expect to change!

    If you are going to change, why not go to radians!
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

  5. #5
    p38arover's Avatar
    p38arover is offline Major part of the heart and soul of AULRO.com
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    DMS are too hard to accurately position on a map and impossible on a street directory.

    i use UTM - Eastings and Northings. Using those, it is extremely easy, down metre accuracy, to locate or position oneself on a map.

    The grid on a topo map is in multiples (or fractions) of 1000 metres and the numbers refer to Eastings and Northings. Ditto on a street directory (if you young blokes have ever seen one )

    I used to use DMS or decimal when I worked with hydrographic charts (plotting submarine cable positions or trawlers).
    Last edited by p38arover; 22nd October 2017 at 09:16 AM.
    Ron B.
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  6. #6
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    Quote Originally Posted by donh54 View Post
    Every gps I've owned or used, has choices in the Settings menu for DD, DMS, etc.
    I could not find it in the book. I will have another play. Its a 7 not a 6, wrong button.

    K

  7. #7
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    Quote Originally Posted by JDNSW View Post
    I've been using DMS for about 70 years - and don't expect to change!

    If you are going to change, why not go to radians!
    I will stick with DMS as well. Just have to brush up on my maths to do the multiplication and division to convert one to the other.
    I use radians or Mils (milradians) for scope settings on my rifle scopes, thats all.

    Keith

  8. #8
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    When I was a baggy green-skinned animal with black feet, we used mils for navigation, bearings etc.
    -----
    You have the right to remain silent. Anything you say will be misquoted, then used against you.
    -----

    1999 Disco TD5 ("Bluey")
    1996 Disco 300 TDi ("Slo-Mo")
    1995 P38A 4.6 HSE ("The Limo")
    1966 No 5 Trailer (ARN 173 075) soon to be camper
    -----

  9. #9
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    Quote Originally Posted by donh54 View Post
    When I was a baggy green-skinned animal with black feet, we used mils for navigation, bearings etc.
    Me too.
    We also used "Clicks" for distance and now the only clicks I get come from my knees
    You only get one shot at life, Aim well

    2004 D2 "S" V8 auto, with a few Mods gone
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  10. #10
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    I personally use DMS, but prefer UTM myself(Eastings and Northings as P38 says..) easier to estimate how far in a straight another point is in a straight line compared to degree values.
    But I use DMS because of the lowest common denominator rule .. that is the device that can only show degrees(ie. not E and N values) so it's easier to quickly determine relative location.

    Quote Originally Posted by 123rover50 View Post
    ... Can my Hema be changed to read in DD as well?

    Keith
    I don't have a Hema. looked at getting one but found they cost too much for what you really get .. So I just buy their maps as needed and as they get updated with newer data or more detailed info.

    I still use OziExplorer mainly on PC, and Ozi Android now for mobile mapping. Used Ozi WinCE for years too.

    Doing a lot of research on the HEMA hardware, they run two different programs, depending on what you want to do.
    Some iGo or whatever street nav app, and a cut down mobile version of Ozi for the 4WD mode.

    So the answer depends on which app, or mode you mostly use.

    if it's the 4WD mode(ie,. non turn by turn mode), then you're using Ozi and there are settings to use whatever mode you prefer DMS, DM or D.
    In this instance you go to Settings -> General(gear wheel)->Operation tab .. you should see the Position format box up top there.

    Full fledged Ozi has many different position formats many that you wouldn't use(eg. Swiss or Swedish Grid, and other formats for foreign lands and maps), and you wouldn't expect those non Aus related types to be included in the HEMA.
    But even a stripped out version should offer the 3 various Degree formats(D, DM and DMS), and most likely the universal UTM too.

    hope that helps.
    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

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