[Qgis-user] Georeferencing a DXF file

[Bernd Vogelgesang]

Hi Walt,

though I do no have a lot of experience with CAD imports and no idea of
the idea behind CAD in general, but I learnt over the time, that doesn't
make much sense to try to make good data out of shitty data, but to
better try to convince those non-geo CAD-users to invest some time in
finding the proper export settings for their data.
I at least received already a good amount of AutoCAD files that went
into QGIS super-smooth without any problem, while from others it was
crap like yours.

So the solution is the person behind the CAD-program, and rather not to
find sophisticated import strategies.

Just my 2 cents

Bernd



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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