[Xastir] Cartographers? UTM/UPS Questions

[Brian D Heaton]

Curt,

	The 500K value is definitely correct on the data I have.  If you take a
look at http://www.fgdc.gov you can find most of the current US
standards.  MGRS is covered there as the "US National Grid" - 
FGDC-STD-011-2001.  Support for MGRS would be an excellent addition to
Xastir.  As operations become integrated between local/state/federal and
civillian/military organizations, having systems which can speak all the
coordinate systems in use can be a huge win.

	I can't really speak to the UPS coordinates.  I know its different in
the extreme lattitude zones, but don't recall the details.  I expect
you've found good data though.

			THX/BDH


On Sun, 2003-10-19 at 01:45, Curt Mills, WE7U wrote:
> On Sat, 18 Oct 2003, Curt Mills, WE7U wrote:
> 
> > UTM:
> > ----
> > There are two irregular zones in the area of Southern Norway (31V and
> > 32V), and four irregular zones above there (31X, 33X, 35X, 37X, with
> > 32X/34X/36X/38X being absent).
> 
> -snip-
> 
> > BTW:  I don't see a mention of these irregular zones on many sites,
> > even university sites that should have it.  I had to really dig for
> > the information.
> 
> Of course I just found another mention of this stuff after I sent out
> the message:
> 
> http://www.geog.umn.edu/courses/1502/Lecture7-1/Lecture7-1.htm
> 
> It says this: "Military and civilian referencing systems are in use.
> In the civilian system, location is described in terms of eastings
> and northings. A false origin is established 500,000 meters west of
> the central meridian of the UTM zone to assure that all eastings have
> positive values. The military modification of the UTM system uses a
> different grid size and adjusts some quadrangle above 56 North.
> Additionally, the military system also codes the grid zones with
> letters."
> 
> I guess that means I need to fix the grid for Xastir, unless we
> implement MGRS in the future, at which point we'll need the grid we
> draw now.
> 
> Verification of this latest fact?
> 
> I still need the UPS and MGRS questions answered as well.
> 
> Curt, WE7U.				archer at eskimo.com
> http://www.eskimo.com/~archer
>   Lotto:  A tax on people who are bad at math. - unknown
> Windows:  Microsoft's tax on computer illiterates. - WE7U.
> The world DOES revolve around me:  I picked the coordinate system!"
> 
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Brian D Heaton
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Janus Research Group
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