<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">I agree - I don't see that any of the wide field tmerc implementation<br>
made it into my PROJ.4. If someone (ideally Gerald) could identify a<br>
preferred implementation I'd be willing to port it over or apply a<br>
patch if someone else wants to file a ticket with a proposed change.<br></blockquote><div><br></div><div>Frank, I have just been on a journey through my mail archive and have found a personal email from Gerald with his timing and roundtrip-precision tests of the different wide field transverse mercator implementations. My interpretation of his results is that the Engsager implementation sits in the sweet spot between speed and precision. I will forward the material (including source code) to your <a href="http://pobox.com">pobox.com</a> address in a few minutes.</div>
<div><br></div><div>/thomas</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br>
Best regards,<br>
<font color="#888888">--<br>
---------------------------------------+--------------------------------------<br>
I set the clouds in motion - turn up | Frank Warmerdam, <a href="mailto:warmerdam@pobox.com">warmerdam@pobox.com</a><br>
light and sound - activate the windows | <a href="http://pobox.com/~warmerdam" target="_blank">http://pobox.com/~warmerdam</a><br>
and watch the world go round - Rush | Geospatial Programmer for Rent<br>
</font><div><div></div><div class="h5"><br>
_______________________________________________<br>
Proj mailing list<br>
<a href="mailto:Proj@lists.maptools.org">Proj@lists.maptools.org</a><br>
<a href="http://lists.maptools.org/mailman/listinfo/proj" target="_blank">http://lists.maptools.org/mailman/listinfo/proj</a><br>
</div></div></blockquote></div><br>