[Qgis-user] Georeferencing a DXF file

[Andreas Neumann]

Hi all,

If I may chime in:

this is a long-standing user wish - being able to georeference vector 
files in QGIS (in an easy way). This needs to go into core, not as a 
plugin that breaks with future QGIS releases or has dependency issues.

The same discussion also pops up in the Swiss and QGIS user group e-mail 
lists again and again and I believe it should be able to come up with 
funding, if some developer could take the lead on implementing this in 
QGIS core. I was hoping that Jürgen would be available to implement it, 
as he also did the DXF/DWG importer and it would make sense, that the 
DXF/DWG importer also integrates with a vector georeferencing solution.

Jürgen - would you be available to work on it? Or Alex?

Would someone be available to summarize the requirements and approaches 
in a QEP? I think this would help tremendously, writing down the 
requirements. Unfortunately, I don't have time currently to work on the 
QEP myself. But I will help to find funding to get this functionality 
into QGIS core.

Thanks,
Andreas

On 2021-02-03 20:10, Walt Ludwick wrote:

> I've received a 3D AutoCAD file from an architect that i managed to 
> convert into 2D .dxf format and import into my QGIS project, but it is 
> out-of-scale and out-of-place, so i guess i need to add some 
> georeferencing coordinates to the file.
> 
> This should be easy enough, since it's an accurate representation of a 
> building that's already in the project -with an additional wing tacked 
> on- so i'm thinking i could just use a few corners of that existing 
> buildings as ground control points, and map them to the corresponding 
> corners on this .dxf model, then maybe all other co-ordinates could be 
> automatically generated by some tool, if i could just find the right 
> one for the job.
> 
> Is there in fact any such easy way to do this thing?
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