PROJ/src/ellps.cpp, branch 8.2 Forked from https://github.com/OSGeo/PROJ International ellipsoid designation correction 2021-02-16T10:03:37+00:00 Thomas Knudsen busstoptaktik@users.noreply.github.com 2021-02-16T10:03:37+00:00 c7543c2ff45883f2ac92b4b9a33700215e1996ca The "International 1909 (Hayford)" designation is an unfortunate mix of different aspects of the same ellipsoid. The Hayford ellipsoid was based on investigations in 1909, published in 1910 as J.F. Hayford: *Supplementary Investigation in 1909 of the Figure of the Earth and Isostasy*, Coast and Geodetic Survey, 80pp. (freely accessible through Google Books). In 1924 Hayford's ellipsoid was adopted by the IUGG as "the International Ellipsoid". Hence either of - Hayford, 1909 (for the year the work was done), - Hayford, 1910 (for the year of publication), or - International, 1924 are reasonable names, in common use, but the "International, 1909" really is a peculiar mix of concepts. Resolves #2534 
The "International 1909 (Hayford)" designation is an unfortunate mix of different aspects of the same ellipsoid.

The Hayford ellipsoid was based on investigations in 1909, published in 1910 as J.F. Hayford: *Supplementary Investigation in 1909 of the Figure of the Earth and Isostasy*, Coast and Geodetic Survey, 80pp. (freely accessible through Google Books).

In 1924 Hayford's ellipsoid was adopted by the IUGG as "the International Ellipsoid".

Hence either of 

- Hayford, 1909 (for the year the work was done),
- Hayford, 1910 (for the year of publication), or
- International, 1924

are reasonable names, in common use, but the "International, 1909" really is a peculiar mix of concepts.

Resolves #2534
 Merge projects.h into proj_internal.h 2018-12-30T20:48:56+00:00 Even Rouault even.rouault@spatialys.com 2018-12-26T13:58:26+00:00 8ab6f683cd316acf57bb89ed83932a267c5aa3c2 






cpp conversion: remove useless pj_, PJ_ and proj_ filename prefixes
2018-12-26T09:08:55+00:00

Even Rouault
even.rouault@spatialys.com

2018-12-19T12:00:37+00:00

df574ae332d57f556fd56314883b3354cab1d0ff