[Proj] MGRS/USNG support?

Gerald I. Evenden gerald.evenden at verizon.net
Thu May 4 16:15:31 EDT 2006

On Thursday 04 May 2006 3:46 pm, Duncan Agnew wrote:
> I've made this point before, but again: MGRS and other location codes
> are different things from
> the coordinates PROJ works with. The coordinates describe a point, the
> codes describe an area
> (to variable precision depending on code length).
> Not to say there wouldn't be room for a separate routine that converted
> UTM zone, E, and N, to
> MGRS or equivalent (there is no reverse mapping)--but it should be
> separate.

The zone concept was my impression when I looked at the problem
several years ago.  Proj in it various forms deals with a point coordinate
and not a surface region.  That is, as I recall, the length of  the military
grid system string also determined the size of the cell referred to.

I think this is an apples-oranges issue.

Also, what is meant by the "U.S. National Grid?"

Jerry and the low-riders: Daisy Mae and Joshua
"Cogito cogito ergo cogito sum"
   Ambrose Bierce, The Devil's Dictionary

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