[Qgis-user] Georeferencing a DXF file

[j.huber at post-ist-da.de]

Hi Walt,

I would load the dxf file with the modified building in QCAD and 
move/translate the data there. After saving the modified dxf file, this 
should import in QGIS at the correct location.

You will need two reference points from the existing building structure 
- you could for example export the existing data set from QGIS to dxf 
and load it in QCAD as a reference or write the coordinates of two 
points out manually in QGIS.

Regards
Jochen

Am 03.02.21 um 20:10 schrieb Walt Ludwick:
> 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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