John Stevenson - BGS jostev at bgs.ac.uk
Thu Aug 7 05:02:32 PDT 2025
When I add a layer with OSGB36 (epsg:27700) projection to a project in QGS84
(epsg:4326), I am given an option to select the coordinate transformation to
use. There are multiple options: https://epsg.io/27700. The best includes a
custom correction grid, OSTN15_NTv2.
Once the layer has been added, is there a way to see which transformation was
used?
Hi John,
you should find chosen datum transformation in "Settings -> Options ->
CRS and Transforms -> Coordinate Transforms" and /or "Project ->
Properties -> Transformations".
Please see:
-
https://docs.qgis.org/latest/en/docs/user_manual/introduction/qgis_configuration.html#transformations-properties
-
https://docs.qgis.org/latest/en/docs/user_manual/introduction/qgis_configuration.html#transformations-options
-
https://docs.qgis.org/latest/en/docs/user_manual/working_with_projections/working_with_projections.html#datum-transformations
Regards.
Andrea
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