<div dir="ltr">Hi Gerard,<br><br>Thanks for your response. I realise that this isn't a support forum, but I'm not getting any joy anywhere else and you are clearly very knowledgeable on this topic<br><br><div class="gmail_quote">
On Sat, Aug 9, 2008 at 6:01 PM, <span dir="ltr"><<a href="mailto:proj-request@lists.maptools.org">proj-request@lists.maptools.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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Message: 2<br>
Date: Fri, 8 Aug 2008 16:49:58 -0400<br>
From: "Gerald I. Evenden" <<a href="mailto:geraldi.evenden@gmail.com">geraldi.evenden@gmail.com</a>><br>
Subject: Re: [Proj] Transverse Mercator south-oriented projection<br>
support?<br>
To: "PROJ.4 and general Projections Discussions"<br>
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Groan!</blockquote><div><br>Is this a bit of a recurring nightmare for you? Sorry about that.<br><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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There is no need to modify the library routines as all that is needed is to<br>
switch around the x-y and signs of the lat-lons.</blockquote><div><br>I tried lodging a bug with qgis [1], but they seemed to think the problem was with proj4 (although, through my ignorance that was my guess, so I might have planted the seed of that conclusion). <br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
I would just use +proj=tmerc and put some added '-' flags to juggle the I/O.<br>
But that's somebody else's job as I only work on the library. ;-)</blockquote><div><br>I tried this suggestion (I think I did), but negative zero doesn't make any sense to proj4.<br>Without adding the '-' flags, this is what I think the parameters need to be for one of the projections I'm interested in:<br>
<br>+proj=tmerc +ellps=WGS84 +lat_0 +lon_29 +k=1 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs<br><br>Is it defined more fully on <a href="http://spatialreference.org">spatialreference.org</a>[2]. You'll note that <a href="http://spatialreference.org">spatialreference.org</a> doesn't have a proj4 definition.<br>
<br>If the library isn't the right place to look for a solution to this, where is?<br><br>Thanks for your time. I'm sure this is a pain for you. I hope any additional groaning will not be too severe.<br> </div><div>
[1] <a href="https://trac.osgeo.org/qgis/ticket/1176">https://trac.osgeo.org/qgis/ticket/1176</a> <br>[2]<a href="http://spatialreference.org/ref/epsg/2053/">http://spatialreference.org/ref/epsg/2053/</a><br></div></div><br clear="all">
<br>-- <br>Neil Robinson<br>
</div>