[Proj] Unknown projection?

[Mikael Rittri]

Ipbüker has also published a journal version of the conference paper:

    An Inverse Solution to the Winkel Tripel Projection Using Partial Derivatives.
    Cengizhan Ipbüker, CaGIS Journal, Vol. 29, no. 1 (Jan 2002).
    Abstract can be found at http://www.cartogis.org/publications/abstracts/cagisab0102.html

I read it some years ago. If I remember right, it was 
specifically targeted at Winkel Tripel, more so than the 
conference version.  
That is, for someone who is rusty on bivariate Newton-Raphson
- like me! - the CaGIS version may be easier to implement.
 
Best regards,
Mikael 

--
Mikael Rittri
Carmenta AB
Box 11354
SE-404 28 Göteborg
Visitors: Sankt Eriksgatan 5
SWEDEN
Tel: +46-31-775 57 37
Mob: +46-703-60 34 07 
mikael.rittri at carmenta.com
www.carmenta.com

-----Original Message-----
From: proj-bounces at lists.maptools.org [mailto:proj-bounces at lists.maptools.org] On Behalf Of OvV_HN
Sent: den 13 september 2008 20:59
To: PROJ.4 and general Projections Discussions
Subject: Re: [Proj] Unknown projection?


----- Original Message -----
From: "Paul B. Anderson" <pbander at cavtel.net>
To: "PROJ.4 and general Projections Discussions" <proj at lists.maptools.org>
Sent: Saturday, September 13, 2008 6:26 PM
Subject: Re: [Proj] Unknown projection?


> One person who has researched the inverse Winkel Tripel formulas issue is 
> Dr. Robert Schmunk http://www.giss.nasa.gov/staff/rschmunk.html


Let's not forget:

A GENERAL ALGORITHM FOR THE INVERSE TRANSFORMATION OF
MAP PROJECTIONS USING JACOBIAN MATRICES,
Cengizhan Ipbüker, I.Öztug Bildirici
Proceedings of the Third International Symposium Mathematical & 
Computational Applications
September 4-6, 2002. Konya, Turkey, pp. 175-182
Istanbul Tech. University Faculty of Civil Eng., Div. of Cartography, Maslak 
Istanbul,
Turkey
Selcuk University, Faculty of Eng., Dept. of Geodesy & Photogrammetry, 
Konya,
Turkey
http://atlas.selcuk.edu.tr/paperdb/papers/130.pdf

With a Newton iteration procedure for the inverse of Aitoff-Hammer, 
Winkel-Tripel and Mollweide.

Oscar van Vlijmen




_______________________________________________
Proj mailing list
Proj at lists.maptools.org
http://lists.maptools.org/mailman/listinfo/proj