<div class="gmail_quote">2011/2/16 Noel Zinn (cc) <span dir="ltr"><<a href="mailto:ndzinn@comcast.net">ndzinn@comcast.net</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
I agree for what may be the "basic" TM in Proj.4, however Proj.4 does have<br>
more than one of the Scandinavian implementations of TM that are robust far<br>
from the TM. Search for and use one of those and you'll get better<br>
round-trip closure. -Noel<br></blockquote><div><br></div><div>Noel: </div><div>I assume you are talking about the "Engsager Extended Transverse Mercator" (etmerc) implementation, written by my colleague Karsten Engsager. With Karsten's approval, I submitted that implementation to Gerald Evenden a few years ago. This was followed by one or two other similar "wide field"-transverse mercator implementations, which were all integrated into Gerald's original proj library, but I do not think it ever made its way into Frank's version.</div>
<div><br></div><div>Christoph:</div><div>I could dig out the Engsager source code with my modifications for proj-compatibility, if you are interested. Integrating it into Frank's proj version should be fairly straightforward, and you are most welcome to do it. I just haven't had spare time to do it and submit a patch yet.</div>
<meta http-equiv="content-type" content="text/html; charset=utf-8"><div><br></div><div>/thomas</div><div><br></div></div>