Peter Hartl via QGIS-User <[email protected]> writes: > QGIS interprets NMEA data as WGS84 geographic data which is correct!
No, it is not correct. It is only correct it the receiver is operating in WGS84. That is true *only* for non-differential solutions. That means not with SBAS, not with RTK. And, it's also not correct because WGS84 is an ensemble. > I could not find to say to QGIS that it should use ETRS89 datum! I think that's a missing feature. The feature is missing in QField too: https://github.com/opengisch/QField/issues/2855 There's another problem, which is that proj, when asked to transform from WGS84 to NAD83(2011) 2010.0, uses a null transform. That technically makes sense because WGS84(TRANSIT) is roughly equal to NAD83(1986). But it doesn't actually make sense. > We are using *QField*, here Transformation in X, Y from GNNS into our > MGI with gridshift is working correkt (Vertical girdshift works too > very goo in cm accuracy)! But what is the actual datum your NMEA is in? What kind of GNSS are you using? > The *same QGIS projekt behind with QGIS* shows data in map correct > (set to 25832) but in saving to 31254 it gets shift, without > possibiltity for changing that for me. > > For me it looks like a issue in QGIS! Maybe but you have not answered my questions about what is really going on, and you may be operating in a mode where multiple bugs sometimes cancel and sometimes do not. _______________________________________________ QGIS-User mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
