[QGIS-Developer] [Qgis-user] CAD and QGIS - Working with archaeological sites

[Nyall Dawson]

On Fri, 10 Aug 2018 at 08:01, Alexandre Neto <senhor.neto at gmail.com> wrote:
>
> Hi,
>
> On Thu, Aug 9, 2018, 22:27 C Hamilton <adenaculture at gmail.com> wrote:
>>
>>
>> Also is there a way a non georegistered image be imported, make it somewhat transparent, and then interactively drag and resize it on the map somewhat like Google Earth? When you don't really have anything to reference the image to you can't use georeferencer.
>
>
> I guess you could do that on layout mode. Adding an imagem, set some transparency and then try to fit it somewhere.
>
> Once it's on the right spot. Save the layout as image storing a world file. Then you can add it back, and use georeferencer on the original image.

Actually if you save the world file you shouldn't need to use
georeferencer - it should be placed in the correct place immediately
after loading in QGIS.

> I am not a CAD guy, so I would trace it using QGIS.

Just to add to this - the digitizing tools in QGIS are very powerful
now (especially with the new shape digitizing toolbar in 3.0, and the
Advanced Digitizing dock. I'd go with that approach as doing it in the
GIS means that it's inherently spatial data - vs doing it in CAD,
which means you've gotta manage the spatial reference manually.

Nyall