[Qgis-user] question on advanced digitizing

[Andreas Neumann]

Hi Gabriel,

Yes - this is possible - but it is a bit hard to find.

I will try to explain (and yes, this would need improvements in the 
digitizing chapter of the QGIS manual).

Steps:

1. Enable Snapping on your active layer

2. Enable "Self Snapping"

3. Press the "Add Polygon Feature" button (but don't yet digitize)

4. Enable "Advanced Digitizing"

5. In the "Advanced Digitizing" panel select the angles you want to snap 
to

6. Start digitizing by pressing the left mouse button and adding the 
first segment with the second click

7. Add any additional segments by staying with the new segments within 
the angle tolerance in order to get new segments with proper right 
angles

8. If you want to close: first press "Alt-A" to fix the angle. Second: 
go to your initial start point and snap to it with the Left Mouse Button

9. Press "Right Mouse button" to finish editing the polygon

Here is a Video demonstrating the steps: 
https://www.youtube.com/watch?v=JimwOpN8dOU (sorry about my voice, I 
don't have a radio voice ;-) )

As others have pointed out, you can uses the different "Add Rectangle" 
modes in the "Shape Digitizing Toolbars", e.g. "Add Rectangle from 3 
points".

Hope this helps,

Andreas

On 2021-05-05 20:38, Gabriel Cotlier wrote:

> Hello,
> 
> I'm digitizing a square using the advanced digitizing tool, however 
> when I'm about to close the rectangle's last angle, the tool doesn't 
> offer me to see how to close it with a perfect square angle at the last 
> click. Thus cannot finish the figure as a perfect square (four 90 
> degree angles).
> 
> How can I perform the square with the 4 perfect 90 degree angles using 
> the digitizing tool?
> 
> Thanks a lot for your help.
> Kind regards,
> Gabriel
> 
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