[PROJ] libproj4 archived in a github repo [was Re: "eck_greif" projection, "libproject"?]

[Kristian Evers]

> On 5 Mar 2020, at 21:12, Oscar van Vlijmen <vanadovv at hetnet.nl> wrote:
> 
> libproj4.3_20081120
> Cartographic Projections
> libproject C library
> http://home.comcast.net/~gevenden56/proj/index.html
> 

Unfortunately that link is dead. A bit of googling reveals 
https://karczmarczuk.users.greyc.fr/TEACH/InfoGeo/Work/libproj4.3_20081120.tar.bz2 <https://karczmarczuk.users.greyc.fr/TEACH/InfoGeo/Work/libproj4.3_20081120.tar.bz2>

It seems the file structure is different from the code base Even has put in his
repostory. I don’t know if that means this code is more recent or not.

> This is the link I donwloaded the latest version of Libproj from.
> It could be that this link is dead.
> 
> I noticed that a lot of projections coded in Libproj are missing in Proj.

Yeah, that has been highlighted a few times recently. It would be cool if
someone could find the time to incorporate them in current PROJ. I’m
happy to provide guidance if someone should want to take on this job.

/Kristian

> Take the Mayr projection. Horrible, since Evenden in a later version enforced the inclusion of GNU GSL, totally unnecessary since the quadrature integration doesn't provide much more accuracy.
> Anyhow, Libproj could provide some amusement to some.......
> 
> 
> Greetings,
> Oscar van Vlijmen
> 
> 
> 
>> Op 5 maart 2020 om 16:53 schreef Even Rouault <even.rouault at spatialys.com>:
>> 
>> 
>> On jeudi 5 mars 2020 16:39:04 CET Oscar van Vlijmen wrote:
>>> I still have a copy of libproj 4.3 from November 2008.
>> 
>> oh cool! Can you provide a link to it ?
>> I do see that in https://download.osgeo.org/proj/from_kai/ we have a PROJ.
>> 4.3.3.tar.gz, but it includes a pj_hammer.c without explicit eck_greif...
>> 
>> -- 
>> Spatialys - Geospatial professional services
>> http://www.spatialys.com
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