[gdal-dev] How do I add a projection to proj 8?

[Javier Jimenez Shaw]

If what you need is really EPSG:3857, yes, use it.

However I have seen strange parameters on your projection. The radius of
the sphere is the "average" 3671 km, and you set a false easting and
northing of just 4.4 km. Is that trying to correct the radius of the
sphere? I do not know why you need that.

Bas, are they really equivalent?

In proj you can convert to WKT1 (see that I added +type=crs):

projinfo "+proj=merc +a=6371001 +b=6371001 +lat_ts=0.0 +lon_0=0.0
+x_0=-4448 +y_0=-4448 +k=1.0 +units=m +over +nadgrids=@null +no_defs
 +type=crs" -o wkt1_gdal


On Sat, 13 Apr 2024 at 06:17, Sebastiaan Couwenberg via gdal-dev <
gdal-dev at lists.osgeo.org> wrote:

> On 4/12/24 11:24 PM, Stephen Woodbridge via gdal-dev wrote:
> > and was able to access it in gdal, mapserver, postgis, etc with
> > "EPSG:900914"
>
> I used to do that too, but switched to EPSG:3857 its non-deprecated
> equivalent. I would recommend that instead of trying to keep using a
> non-standard projection.
>
> Kind Regards,
>
> Bas
>
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