Hello Roland,
thanks for reply!
We are using vertical datums transformation in QField, here
Transformation in X, Y and Z from GNNS into our MGI with gridshift is
working correkt!
Herzliche Grüße
Hartl Consulting e. U.
DI Peter Hartl MAS(GIS)
Gröben 11
A-6134 Vomp
Tel.: +43 660 17 42 228
[email protected]
www.hartl-consulting.at
Am 07.02.2025 um 13:42 schrieb Roland Spielhofer:
Hi Peter,
regarding your last point - are you aware of
https://www.bev.gv.at/Services/Produkte/Grundlagenvermessung/Hoehen-Grid.html
In recent versions QGIS has learned about vertical datums - I use
Höhen-Grid in our own processing workflow (not QGIS-related) for
transformation from ellipsoidal height to Höhe über Adria, but I think
it could work in QGIS as well.
Grüße nach Tirol,
Roland
*Gesendet: *Freitag, 7. Februar 2025 um 07:11
*Von: *"Peter Hartl via QGIS-User" <[email protected]>
*An: *[email protected]
*Betreff: *[Qgis-user] QGIS GNSS NMEA Transformation Problem WGS84 to
MGI Austria
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
[email protected]
www.hartl-consulting.at
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