[PROJ] Proj 6 API questions

[Nyall Dawson]

On Tue, 19 Mar 2019 at 15:46, Kristian Evers <kreve at sdfe.dk> wrote:
>
>
>
> On 19 Mar 2019, at 04:20, Nyall Dawson <nyall.dawson at gmail.com> wrote:
>
> On Mon, 18 Mar 2019 at 16:42, Kristian Evers <kreve at sdfe.dk> wrote:
>
> It would be interesting to see the difference between the ellipsoid tables from
> The QGIS and PROJ databases.
>
>
> Using the latest approach, the older QGIS ellipsoids I haven't been
> able to match are whittled down to:
>
> acronym/name/major/minor
>
> ['andrae','Andrae 1876 (Den., Iclnd.)', 6377104.43,6355847.415233333],
> ['CPM','Comm. des Poids et Mesures 1799',6375738.7,6356666.221912112],
> ['delmbr','Delambre 1810 (Belgium)',6376428.0,6355957.926163724],
> ['Earth2000','Earth2000',6378140.0,6356750.0],
> ['kaula','Kaula 1961',6378163.0,6356776.99208691],
> ['lerch','Lerch 1979',6378139.0,6356754.291510342],
> ['MERIT','MERIT 1983',6378137.0,6356752.298215969],
> ['mprts','Maupertius 1738',6397300.0,6363806.282722513],
> ['new_intl','New International 1967',6378157.5,6356772.2],
> ['WGS60','WGS60',6378165.0,6356783.286959437]
>
>
> Okay, that’s not too bad. Most of them are also in `proj -le`. I think only EARTH2000 and MERIT
> are unknown to PROJ today.
>
> Any clues on these?
>
>
> They can be added to the database as custom ellipsoids under the PROJ authority. The
> reason they are not there now must be because they are unused by the operations in
> the EPSG registry. Pull requests are welcome :-)
>

Sure -- got any tips on where this is done? I'm new to the proj code.

Nyall


> /Kristian