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[aprssig] Lat. / Long. Expressions

Gerry Creager gerry.creager at tamu.edu
Tue Sep 11 17:05:51 UTC 2007


Couple of points here.

Both representations are correct.  There are acceptable use methods for 
both, and for several others, as some have posted here.

By convention in the real world, e.g., that of the geodesist or 
cartogrpher, we tend to use the convention of North, East positive. 
Thus, my rough location would be 30-36-16, -96-22-30, or, roughly 
30.55N, 96.255W.  Most of us can translate the various systems.

The National Geodetic Survey tends to promote North/West positive to 
support geodetic surveyors and make their lives slightly easier. 
They've also created local-projection state-plane systems to ease the 
calculations for said surveyors.

Realize that within the APRS community there is a normative approach 
(although I'd hesitate to call it a "standard" in the formal sense) that 
should be followed, else someone else will tell you how wrong you are.

gerry n5jxs

KB5ILY - Travis W. Burton wrote:
> Hi,
> 
> In doing some online research I find that one website has my local
> hospital's location listed as 34-07-21.3 N, 093-05-25.6 W.  Yet another
> site has it listed as 34.12258  -93.09044.
> 
> Is one way better or worse than the other, and why ?  (I know, I had to
> throw that last part in there, ha ha)
> 
> 73 de Travis  KB5ILY
> 
> --
>             Travis W. Burton, NP, ESQ., KB5ILY / Arkadelphia AR
>   EC - Clark County AR, SATERN, ARRL Instructor & VE, AREC I, II & III
>                      Internet: mailto:kb5ily at arrl.net
>                         WWW:  http://www.kb5ily.org
>                    GOD BLESS THE UNITED STATES of AMERICA
> Only he who Attempts the Ridiculous can Achieve the Impossible. (WILL HENRY)
>                    Linux is my operating system of choice.
> 
>                    Computers are like Air Conditioners,
>              they stop working correctly when you open windows.
> 
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.862.3982 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843





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