[Qgis-user] Adding topological vertices

[Andreas Wicht]

Hi,

On Fri, 9 Aug 2019 at 14:40, Jan Hartmann <j.l.h.hartmann at uva.nl> wrote:
>
> Hi all,
>
> In QGIS 2 I could add a vertex on a segment shared by two polygons just
> by double-clicking on that segment. When topological editing was
> enabled, a new vertex was added to both polygons, and I could move them
> both just by dragging.
>
> In QGIS 3, when topological editing is enabled, moving a shared vertex
> is a bit more complex. I cannot just click on that vertex and then click
> on the destination location, for then only one of the shared vertices is
> moved. I have to shift-drag around the vertex, then click on the
> selected vertices, and only then all shared vertices are moved. No
> problem with that, by the way.

The vertex tool has issues when you want to topologically edit vertices
while the layer you edit is being reprojected on-the-fly.
Please try again while the project CRS is the same as the layers'.

> The real problem is when I want to add a vertex on a shared segment.
> When I double-click on that segment, a new vertex appears, but only on
> one of the segments. I can move that vertex, but only one segment is
> moved. The underlying segments remain in place. To move them too, I have
> to create vertices on all of them, and move them all to the new
> location. This *is* a problem.

The same applies here.

Cheers