[aprssig] UTM grid (was: APRStt for SAR using...)

[Steve Daniels]

Dug out some links, looked into this when I wanted to do OSGB36 to WGS84
conversion. The last link is the one that is probably most useful for what
is required

http://home.hiwaay.net/~taylorc/bookshelf/math-science/geodesy/datum/transfo
rm/molodensky/

http://www.colorado.edu/geography/gcraft/notes/datum/datum_f.html

http://www.uwgb.edu/dutchs/usefuldata/utmformulas.htm


Steve Daniels
Amateur Radio Callsign G6UIM
APRSISCE/32 Beta tester and WIKI editor http://aprsisce.wikidot.com
 

-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Steve Daniels
Sent: 16 May 2013 15:03
To: 'TAPR APRS Mailing List'
Subject: Re: [aprssig] UTM grid (was: APRStt for SAR using...)

I collected a lot of information a year or so ago, and if I recall you need
the reference point and ellipsoid scale for each area.
And of course for the UK at least most maps are in our local grid system
OSGB36.
I seem to remember it's really just different reference points etc, the
actual conversion algorithm is the same

Steve Daniels
Amateur Radio Callsign G6UIM
APRSISCE/32 Beta tester and WIKI editor http://aprsisce.wikidot.com
 
-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Lynn W. Deffenbaugh (Mr)
Sent: 16 May 2013 13:39
To: TAPR APRS Mailing List
Subject: [aprssig] UTM grid (was: APRStt for SAR using...)

On 5/16/2013 7:45 AM, Robert Bruninga wrote:
> Now all I gotta do is refresh myself on the UTM grid to LATLONG
conversion.

Copy me on what you learn because the last time I looked there isn't 
jsut one UTM grid, but several localized versions that use different 
reference points and conversion equations.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
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