[PROJ] Patterson projection - supported?

[Nyall Dawson]

On Fri, 21 Feb 2020 at 05:28, Even Rouault <even.rouault at spatialys.com> wrote:
>
> Nyall,
>
> > Does this mean that:
> > a. converting the coordinate operation between EPSG:4326 and
> > ESRI:54079 to a **proj** string is not supported
> > b. creating a coordinate operation for this transform isn't possible at all?
>
> Yes to both. They are strongly related.
>
> The "metadata" part of PROJ lacks currently the mapping between the WKT
> representation of this projection and a corresponding PROJ string. Grepping
> for PROJ_WKT2_NAME_METHOD_ECKERT_I / eck1 in the source tree could likely
> serve as inspiration to find the various locations to patch.
>
> Regarding export to PROJ.4 strings of a CRS definition using this projection
> (to be opposed to building coordinate operation PROJ strings), we should
> probably not do it, because it wouldn't be recognized by the GDAL < 3
> ecosystem.

Perfect -- thanks for the pointers!

Nyall
>
> Even
>
>
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