[OSRS-PROJ] Support for Transverse Mercator south-oriented projection.

[Clifford J Mugnier]

Au contraire, monsieur.  The South Africans have been doing it this way for
about a century.  They are not the only ones with what seems "upside down"
to us in the Northern Hemisphere.  Have you ever seen a map of the world
that is compiled and printed in Australia?

Consider that if you accept the closest pole to you as being positive
latitude, the South Africans use the same quadrant logic as we do in North
America, including the absolute value of "increasing" longitude.

Like Buggs Bunny sez: "Eh, what's up, Doc?"

Cliff Mugnier - LSU


Without my having to dig out my references out, is the sign of the northing
increase
in a positive manner as the latitude increases southerly?

Logical use of TM would dictate that the normal TM projection is used with
a
false northing sufficiently far south to make the "zone" of interest still
positive in
the northing values.  To do otherwise is most illogical, to say the least.

Also: "westing?"  Is that positive also?

My, my, I'm getting the idea that being "down under" has drained all the
blood from the head to the other end.  But the Ausies don't seem to have
this problem.

______________
Jerry Evenden and the Low Riders, Katie and  Daisy May
gevenden at capecod.net  http://www.capecod.net/~gevenden
----- Original Message -----
From: Frank Warmerdam <warmerda at home.com>
To: <osrs-proj at remotesensing.org>
Sent: Wednesday, September 20, 2000 11:26 AM
Subject: Re: [OSRS-PROJ] Support for Transverse Mercator south-oriented
projection.


> "Gerald I. Evenden" wrote:
> >
> > What do you mean "south oriented projection?"
>
> Jerry,
>
> See the description extracted from the EPSG database:
>
>
http://www.remotesensing.org/geotiff/proj_list/transverse_mercator_south_ori
ented.html
>
> Assuming this isn't directly supported now, how would you suggest
handling
> it within PROJ.4?  Should a new proj=tmso be implemented that just
internally
> calls the proj=tm code, and transforms the coordinates appropriately
> afterwards?


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