[Proj] Re: Proj Digest, Vol 54, Issue 13

[Jay Hollingsworth]

How about Winkel II (Snyder) ?



At 11:03 AM 11/18/2008, you wrote:

>Message: 3
>Date: Mon, 17 Nov 2008 19:37:08 -0500
>From: "Gerald I. Evenden" <geraldi.evenden at gmail.com>
>Subject: [Proj] Name that projection
>To: "PROJ.4 and general Projections Discussions"
>         <proj at lists.maptools.org>
>Message-ID: <200811171937.08431.geraldi.evenden at gmail.com>
>Content-Type: text/plain;  charset="utf-8"
>
>Paul Anderson alerted me to a problem with the Winkel II projection: 
>it was in
>error as described in the libproj4 system.  The real Winkel II is a variant
>of the Eckert III series of pseudocylindrials with ellipticall shaped
>meridians.  I had used Snyder's original description from his paper "A
>Comparison of Pseudocylindrical Map Projections."  But he recanted on p. 196
>of "Flattening the Earth" which was verified with an independent source.
>
>Things are being corrected but in the process the projection originally
>described as Winkel II does not have a name nor can be attibuted to anything
>but Snyder's erroneous paper.  At the moment, rather than throw it away, I
>will designate it as the no-name projection.
>
>However, if anyone can give it a verifiable attribution, please let me know.
>
>It is the Winkel II in the current 20081109 manual.pdf on
>http://members.verizon.net/~gerald.evenden/proj4/
>
>It will be called the no-name in new reissue of the manual.
>
>--
>The whole religious complexion of the modern world is due
>to the absence from Jerusalem of a lunatic asylum.
>-- Havelock Ellis (1859-1939) British psychologist
>
>
>------------------------------


Jay Hollingsworth

Seabed Portfolio Manager and
Principal Data Architect
Schlumberger Information Solutions
phone: 713 513 8854 fax: 713 513 2093