[gdal-dev] Current state of Winkel Tripel projection support

Even Rouault even.rouault at spatialys.com
Tue Jun 2 03:46:39 PDT 2020


A few remarks:
- There's no EPSG:54030
- There's a ESRI:54030
- ESRI:54030 is World_Robinson, so no Winkel Tripel
- The PROJ implementation of Winkel Tripel supports since 2015 the inverse method, using 
an iterative approach. But there might potential convergence issues. I see it uses a very small 
epsilon in longitude/latitude (1e-12 radian)
- Robinson uses also an inverse method using an iterative approach

The best would be to identify the points that fail to reproject and see if it is expected or not.


> Hi all,
> I'm trying to reproject a raster from WGS84 to Winkel Tripel (EPSG 54030)
> but unfortunately I encounter some error messages :
> non-convergent inverse meridional dist
> latitude or longitude exceeded limits
> I've found some old messages about PROJ not supporting Winkel Tripel
> projection because of a missing inverse transformation function. But I've
> the feeling that this projection is better supported now. So I would like
> to know if there are still limitations with it and hopefully some
> explainations about these errors and a possible workaround. Currently I've
> tried to reduce the target extent but with no luck.
> Regards

Spatialys - Geospatial professional services
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20200602/f15ed183/attachment.html>

More information about the gdal-dev mailing list