[Qgis-user] QGIS GNSS NMEA Transformation Problem WGS84 to MGI Austria

[Peter Hartl]

Hello QGIS Users,

good morning from Winterwonderland Tirol in Austria!

GNSS NMEA interpreted as WGS84 in QGIS can do transformation with 
gridshift from ETRS89 to MGI, that is alredy working very good.

+proj=pipeline +step +inv +proj=tmerc +lat_0=0 +lon_0=10.3333333333333 
+k=1 +x_0=0 +y_0=-5000000 +ellps=bessel +step +proj=hgridshift 
+grids=at_bev_AT_GIS_GRID_2021_09_28.tif +step +proj=utm +zone=32 
+ellps=GRS80

GNSS NMEA data interpreted as WGS84, viewing on map is ok, but saving 
data in MGI (example 31254), default position_vector Transformation 
makes  30 cm gap (parameters are ok, this was before gridshift exists)!

+proj=pipeline +step +inv +proj=cart +ellps=WGS84 +step +proj=push +v_3 
+step +proj=cart +ellps=WGS84 +step +inv +proj=helmert +x=577.326 
+y=90.129 +z=463.919 +rx=5.137 +ry=1.474 +rz=5.297 +s=2.4232 
+convention=position_vector +step +inv +proj=cart +ellps=bessel +step 
+proj=pop +v_3 +step +proj=tmerc +lat_0=0 +lon_0=10.3333333333333 +k=1 
+x_0=0 +y_0=-5000000 +ellps=bessel

*How can I make gridshift from WGS84 to MGI like ETRS89 to MGI?*

*Does somebody know, is verticalshift working in QGIS (similar to 
gridshift in X, Y)?*

Herzliche Grüße

Hartl Consulting e. U.
DI Peter Hartl MAS(GIS)
Gröben 11
A-6134 Vomp
Tel.: +43 660 17 42 228

office at hartl-consulting.at
www.hartl-consulting.at
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20250207/568e4be9/attachment.htm>