I am using QGIS 3x.
I would like to overlay my .csv comma delimited layers in QGIS 3x properly. I have got the Ordnance Survey Maps as the raster players, which CRS is EPSG 27700 1936 British National Grid.
I overlaid these maps with my .csv data, where I set EPSG 4326: WGS 84. As a result, the data is visible, although there are some mismatches, as you can see below:
In the following example, you can see, that the difference is quite big, as the pole appears on the other side of the road effectively. I theoretically know, that the mismatch is driven by different CRS between the comma-delimited layers (WGS 84) and the map layer (British National Grid).
When I change the CRS for my comma-delimited layers, then they don't appear in my location anymore. Their new place is somewhat at the beginning of the coordinate system, as you can see below:
I would like to make sure, that all these layers match to each other as much as possible.
What should I do then?
projinfo -s EPSG:27700 -t EPSG:4326
returns:Grid OSTN15_NTv2_OSGBtoETRS.gsb needed but not found on the system. Can be obtained from the proj-datumgrid-europe package at https://download.osgeo.org/proj/proj-datumgrid-europe-1.5.zip