[Proj] +towgs84 approximation error

Kristian Evers kreve at sdfe.dk
Mon Mar 27 03:37:18 EST 2017

Let me answer this on behalf of Thomas.

The pipeline implementation will be available in QGIS when the next version of PROJ.4 is released and the various distribution platforms adopt it (OSGeo4W for instance). The most likely scenario is that the QGIS developers doesn't change how they interface with PROJ.4. This will still give you the pipeline functionality but only a subset. You will miss the option to include time-varying transformations and you will probably experience a round-about way of setting up your transformation parameters. So eventually it will be available but you will have to perform some mental agility to use the new functionality within the existing QGIS setup.


> -----Oprindelig meddelelse-----
> Fra: proj-bounces at lists.maptools.org [mailto:proj-
> bounces at lists.maptools.org] På vegne af Jochem
> Sendt: 25. marts 2017 14:26
> Til: proj at lists.maptools.org
> Emne: Re: [Proj] +towgs84 approximation error
> Hi Thomas,
> This pipeline implementation will not automatically become available in
> QGIS, right? I need it in QGIS to be able to transform maps instead of
> points (keeping all the line and attribute information). But, I guess QGIS
> is one of the downstream application projects you mention. Your description
> of your developments sound very promising. I would definitely ask the QGIS
> community to adopt it.
> Regards, Jochem
> --
> View this message in context: http://osgeo-
> org.1560.x6.nabble.com/towgs84-approximation-error-
> tp5313738p5314216.html
> Sent from the PROJ.4 mailing list archive at Nabble.com.
> _______________________________________________
> Proj mailing list
> Proj at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/proj

More information about the Proj mailing list