[OSRS-PROJ] Winkel Tripel or Winkel 3 Projection

Paul Selormey paul at toolscenter.org
Sat Aug 23 20:06:29 EDT 2003

Thanks for the reply.

> I think the term "composite" needs some defining.  At first
> I thought you meant something like Goode's projection where
> two different projections are used in two different regions.
> In Winkel-Tripel, the Aitoff projection and the equirectangular
> are averaged.

The OpenGIS and EPSG used the term "Compound" and the meaning
could be taken from this extract from the OpenGIS specifications

"This indicates a compound coordinate system, which combines the coordinate
of two other
coordinate systems. For example, a compound 3D coordinate system could be
made up of a
horizontal coordinate system and a vertical coordinate system."

> The time-line for W1, W2 and WT is 1914, 1915 and 1921 so
> WT might be Winkel's third projection. (?)

We were probably misled by the Japanese document to think there was a "W3".
Could be a language/translation problem - or yet another Japanese simplified
term :-)

Best regards,

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