[Qgis-user] Problem loading ArcGIS georeferenced map in QGIS 2.8

[Andre Joost]

Am 11.03.2015 um 10:55 schrieb Nicole Stoffels:

> I have an old ArcGIS project, that was build before we switched to QGIS.
> I have already worked on it with my older QGIS versions (<= 2.6) and
> added new shape files to an ArcGIS georeferenced map.
>
> Now I opened it with my new QGIS version 2.8. My shape layers are
> displayed correctly but my old ArcGIS maps are not shown underneath the
> shape layers. I can zoom to them, but they suddenly have a completely
> different projection (a strange user CRS), while the original EPSG of
> the project is 31466 (Gauss-Krueger Zone2).
>

Guass-Krueger usually has a datum shift, but ARCGIS datasources don't 
store that inside the raster or vector files. QGIS behaves different, 
and stores datum shift or EPSG code in .qpj files only for vector files.

That might be the reason why you get the offset. It might help to change 
the CRS of the layer from the user-defined to the official EPSG code.

The datum shift from Gauss-Krueger to WGS84 is not constant, but varies 
across Germany. The official EPSG code has an average value for Germany. 
Better values can be found here:

http://lists.osgeo.org/pipermail/qgis-user/2012-August/019083.html

and in the links given there.

HTH,
André Joost